| Author |
 Topic  |
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Aaron Cake
Administrator
Canada
6718 Posts |
 Posted - Jan 15 2012 : 10:44:43 AM
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At such low pressure I'm surprised you are getting a spray from the the injector. Definitely send the 460CCs out for cleaning.
Closed loop can only go so far on these ECUs...
I'm confused...Do you have a Megasquirt or the stock ECU? If you have a Megasquirt then you can just run the 550CC injectors and tune the VE table accordingly. If a stock ECU, you need the proper injectors.
According to the BOSCH L-Jetronic manual, there is a check valve in the fuel pump. That valve may have failed, or it is the pressure regulator bleeding fuel off after the pump has shut down. |
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AGURDI590
Apprentece
USA
19 Posts |
Posted - Jan 27 2012 : 11:46:22 AM
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| Thanks AC ..yes the I'm getting spray @ 17 psi. and closed loop is working great. In Fact the damn thing is running better than it has in a long time and if Im light on the pedal I got 20 mpg combined highway and light city driving. To clarify the S5 NA engine has the following mods: stainless steel racing beat full header to dual mufflers, 550 injectors, turbo II AFM, modded stock fuel rail eliminating the stock FPR, lightly ported intake manifold, modded throttle body, K&N cone air filter, new silicone vaccum hoses, adjustable fuel pressure regulator, external oil reservior for OMP (Castrol 20w50) , Royal Purple 20w 50 in the engine,push 1800 cfm electric fan to help stock fan, stock thermostat with AEM AFR gauge and Temp Gauge. I am only running the stock CPU cause my DIYPNP Megasquirt build could not provide any spark (spend 4 months emailing DIY logs and data but no luck). I believe My cold startups are a roll of the dice because the fuel pressure is not holding in the line and gives me more of a chance to flood it if im not real carefull, I did add a Manual Choke Cable when I did the throttle body mod and It helps a lot if I remember to use it. Im gonna switch back to the turbo II Fuel Pump ..maybe the line pressure will hold then ..if not I have a walbro to try |
AL M GURDIAN |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Jan 28 2012 : 10:24:52 AM
|
Well the TII AFM would explain some of this. Reinstall the NA AFM, and a NA set of injectors....
Don't take this the wrong way, though I'm not sure there is a good way to take this, but your car sounds like a major hack job. Throttle body mod with a "choke" cable?! You should just return the throttle body back to stock.
Use an NA fuel pump with a verified working check ball. Though since you have an aftermarket FPR, the Walbro will do the job becuase you can keep the pressure in line.
Was your DIY registering RPM? Did it output the spark signal to the coils as verified by a scope?
I'm wondering now if there is a very odd problem...like no leading ignition. |
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AGURDI590
Apprentece
USA
19 Posts |
Posted - Jan 28 2012 : 7:40:01 PM
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Ha ! A C thanks for letting me down lightly! Really its not that bad I drive it daily and it only breaks down once a month..just did the water cleaning trick to it cause my FD buddy said my cold start one rotor flooding issue sounded like a sticking apex seal. The Throttle body mod is the standard remove the front throttle plate and seal the holes. the thermal wax pellet was removed. The choke cable is connected to the lever the thermal pellet was using. it works quite well on a cold day. I bumped the fuel pressure to 19 lbs so it does not idle so lean on a hot afternoon. as for the DIYPNP
I will send you the entire converation I had with DIY Autotune
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AL M GURDIAN |
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AGURDI590
Apprentece
USA
19 Posts |
Posted - Jan 28 2012 : 7:43:26 PM
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DIYAutoTune.com Sales (Matt) websales@diyautotune.com
toAL GURDIAN <algurdian@gmail.com>
dateWed, Jun 8, 2011 at 9:11 AM
subjectRe: Fwd: Fw: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
Important mainly because of your interaction with messages in the conversation.
hide details 6/8/11
That's what we need to figure out. I see that you are getting the input correctly, based on your data log that shows a steady RPM signal and no spark loss. And your spark output works as demonstrated by your getting spark with EDIS. So this must be a settings issue. I know you've made a fair number of settings changes, so please send me the latest copy of your MSQ and I will look over your settings.
Thanks,
Matt Cramer
DIYAutoTune.com
AL GURDIAN <algurdian@gmail.com>
--------------------------------------------------------------------------------
Re: Fwd: Fw: Diypnp help 1990 mazda rx7 NA Version 1.1...found spark!
--------------------------------------------------------------------------------
algurdian@gmail.com <algurdian@gmail.com> Sun, Jun 5, 2011 at 1:39 PM
Reply-To: algurdian@gmail.com
To: "DIYAutoTune.com Sales (Russ)" <websales@diyautotune.com>
Ok...after changing ignition settings I got the damn thing to start! runs rough and tach reading is way off reading about3k at idle of 600. (Car tach is dead) but only in the EDIS MODE is where I get spark ...switching back to toothed wheel kills it and no spark is showing on my timing light . The other problem is my fuel kill switch has to be on for the car to run! The kill switch would normally cut all fuel off to the engine with stock cpu . If I turn on the fuel switch ..car immediately floods. How can this be happening?
Sent via BlackBerry by AT&T
--------------------------------------------------------------------------------
From: "DIYAutoTune.com Sales (Russ)" <websales@diyautotune.com>
Date: Fri, 03 Jun 2011 13:03:45 -0400
To: AL GURDIAN<algurdian@gmail.com>
Subject: Re: Fwd: Fw: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
Hi Al,
Matt is out on Vacation until Monday. It can sometimes be difficult for us to enter another tech support conversation, but this is just a quick question that doesn't require me to go back and re-read your entire email conversation history to get up to speed as to what's going on.
Yes, if the last temp in your table is 160 degrees, any temp warmer than that will use the value entered at 160.
Thanks,
Russ Patrick
DIYAutotune.com Technical Support
Please quote your previous emails when you reply, as this will help me look up what we have been discussing and respond to you faster.
On 06/02/2011 02:19 PM, AL GURDIAN wrote:
Hi Matt I went to the defaults and had to convert Centigrade to Fahrenheit ...the temperature range is much different than Arron Cakes settings ..
I dont know why i need a -40 below for florida ..but I put it in -40 to 325 is the low setting and 160 to 101 is the high setting
as stated the high temp is 160 degrees ...what happens if the car is hotter than that ..does it use the 160 degree setting?
On Wed, Jun 1, 2011 at 8:42 AM, DIYAutoTune.com Sales (Matt) <websales@diyautotune.com> wrote:
That table came out a bit weird. You may wish to go back to the MS2/Extra defaults. All I can tell for sure is you need less cranking PW at your temperature.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up our conversation and reply faster, as I'm usually assisting several customers.
On 5/31/2011 5:08 PM, algurdian@gmail.com wrote:
Heres what I used...
Setting Value
10.0330
30.0300
50.0275
70.0255
90.0240
110.0230
130.0215
150.0195
170.0170
180.0160
Sent via BlackBerry by AT&T
-----Original Message-----
From: "DIYAutoTune.com Sales (Matt)"<websales@diyautotune.com>
Date: Tue, 31 May 2011 16:20:14
To:<algurdian@gmail.com>
Subject: Re: Fwd: Fw: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
I suspect you're using too much cranking pulse width; that'll flood it
pretty quickly.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up our conversation and reply faster, as I'm usually assisting several customers.
On 5/31/2011 4:10 PM, algurdian@gmail.com wrote:
Matt the car floods with gas is is hard to start when I put the old stock cpu back in
...luckily I have a fuel cut off switch to help with that . There is no spark or it is weak and getting dosed with too much gas
Sent via BlackBerry by AT&T
-----Original Message-----
From: "DIYAutoTune.com Sales (Matt)"<websales@diyautotune.com>
Date: Tue, 31 May 2011 15:25:29
To:<algurdian@gmail.com>
Subject: Re: Fwd: Fw: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
Looks like you are getting a good RPM signal so it should be sparking.
Next time it won't start, try pulling a spark plug, see if it's wet with
fuel or dry.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up our conversation and reply faster, as I'm usually assisting several customers.
On 5/31/2011 1:17 PM, algurdian@gmail.com wrote:
Hi Matt ..were you able to review the logs yet?
Sent via BlackBerry by AT&T
-----Original Message-----
From: "DIYAutoTune.com Sales (Matt)"<websales@diyautotune.com>
Date: Fri, 27 May 2011 10:20:12
To: AL GURDIAN<algurdian@gmail.com>
Subject: Re: Fwd: Fw: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
Hello Al,
I'm at home today as my wife is feeling sick - I will analyze these once
I get back to the office. Sorry about the delay; I don't have all my
software at home.
Thanks,
Matt Cramer
DIYAutoTune.com support
Please quote your message when you reply, as this will help me look up our conversation and get you a faster response.
On 5/26/2011 8:14 PM, AL GURDIAN wrote:
Hi Matt
Here are the logs you requested ...the car does not smell of fuel as bad as
before when I did these.
Please note this is my daily driver so it is running fine ( albeit Rich )
with the stock CPU. or my modded stock CPU
---------- Forwarded message ----------
From: Al Gurdian<AGurdian@tbsfl.toshiba.com>
Date: Thu, May 26, 2011 at 8:08 PM
Subject: Fw: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
To: algurdian@gmail.com
Al Gurdian
GEM Accounts Representative
agurdian@tbsfl.toshiba.com
561-236-7063 (Cell)
561-214-6189 (Direct Dial)
561-214-7401 (Fax)
----- Forwarded by Al Gurdian/TBSFL on 05/26/2011 08:06 PM -----
*"DIYAutoTune.com Sales (Matt)"<websales@diyautotune.com>*
05/24/2011 10:24 AM
To
AGurdian@tbsfl.toshiba.com
cc
Subject
Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
That is the correct way to do this - for some reason, though, I only see
about three engine revolutions actually recorded. It would be great if
you could make another composite log using the same procedure as well
as, at this point, a regular data log.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up our
conversation and reply faster, as I'm usually assisting several customers.
On 5/23/2011 5:03 PM, AGurdian@tbsfl.toshiba.com wrote:
Hmm ..I must be doing it wrong cause I cranked for 30 seconds
I hit start then i cranked for 30 seconds and hit stop then click
capture to log?
Al Gurdian
GEM Accounts Representative
agurdian@tbsfl.toshiba.com
561-236-7063 (Cell)
561-214-6189 (Direct Dial)
561-214-7401 (Fax)
"DIYAutoTune.com Sales (Matt)"<websales@diyautotune.com>
05/23/2011 04:59 PM
To
AGurdian@tbsfl.toshiba.com
cc
Subject
Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
About 5 seconds of cranking should be enough.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up our
conversation and reply faster, as I'm usually assisting several customers.
On 5/23/2011 4:49 PM, AGurdian@tbsfl.toshiba.com wrote:
Yes...How long do you need it to be ?
----- Original Message -----
From: "DIYAutoTune.com Sales (Matt)" [websales@diyautotune.com]
Sent: 05/23/2011 04:39 PM AST
To: Al Gurdian
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
Could you get a longer composite log?
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up
our conversation and reply faster, as I'm usually assisting several
customers.
On 5/23/2011 1:29 PM, AGurdian@tbsfl.toshiba.com wrote:
No
----- Original Message -----
From: "DIYAutoTune.com Sales (Matt)" [websales@diyautotune.com]
Sent: 05/23/2011 12:41 PM AST
To: Al Gurdian; algurdian@gmail.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
Composite log showed sync if only briefly. Is it getting spark now?
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up
our conversation and reply faster, as I'm usually assisting several
customers.
On 5/22/2011 2:23 PM, AGurdian@tbsfl.toshiba.com wrote:
Hi Matt
My new personal email is algurdian@gmail.com
here is my latest composite log ..car still did not start and I again
smelled fuel
Al Gurdian
GEM Accounts Representative
agurdian@tbsfl.toshiba.com
561-236-7063 (Cell)
561-214-6189 (Direct Dial)
561-214-7401 (Fax)
"DIYAutoTune.com Sales (Matt)"<websales@diyautotune.com>
05/18/2011 10:03 AM
To
AGurdian@tbsfl.toshiba.com
cc
Subject
Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
It's possible; what's your composite log look like now?
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up
our
conversation and reply faster, as I'm usually assisting several
customers.
On 5/17/2011 8:00 PM, AGurdian@tbsfl.toshiba.com wrote:
Hi Matt
I checked the and Yes i had alt cam to grd , however I noticed some
metal
of the resistor it was also touching the proto area . I adjusted it
up
so
it clears everything
do you think this may have caused the problem?
Al Gurdian
GEM Accounts Representative
agurdian@tbsfl.toshiba.com
561-236-7063 (Cell)
561-214-6189 (Direct Dial)
561-214-7401 (Fax)
"DIYAutoTune.com Sales (Matt)"<websales@diyautotune.com>
05/17/2011 01:08 PM
To
"AGurdian@tbsfl.toshiba.com>> Al
Gurdian"<AGurdian@tbsfl.toshiba.com>
cc
Subject
Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
The second trigger input does not appear to be working correctly.
Do you
have Alt Cam connected to ground through a 51K resistor?
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up
our
conversation and reply faster, as I'm usually assisting several
customers.
On 5/15/2011 8:07 PM, AL GURDIAN wrote:
Hi Matt here is the Composite log
Date: Tue, 10 May 2011 16:36:36 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
You'll need to check the box to save it to a file first, but
otherwise,
that's it.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me look up
our
conversation and reply faster, as I'm usually assisting several
customers.
On 5/10/2011 12:37 PM, AL GURDIAN wrote:
ok ..i will have to pull the old CPU out and try to get the
composite
log ..so i just hit start on the composite logger page of Tuner
studio
when i start cranking and stop when i stop Cranking?
Date: Tue, 10 May 2011 12:38:38 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no Spark
That is a normal data log, and it shows me you're losing the RPM
intermittently. I need a composite log. That will tell me WHY
you're
losing RPM intermittently.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me
look up
our conversation and reply faster, as I'm usually assisting several
customers.
On 5/10/2011 9:25 AM, AL GURDIAN wrote:
Hi Matt
will this work ?
Date: Tue, 10 May 2011 08:22:01 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no
Spark
Hello Al,
To use Toothed Wheel mode correctly, you must put the ECU in
either
Extended or Advanced mode instead of Fuel + Spark. If that
doesn't
work,
please use the Diagnostics tab to make a composite log of an
attempted
start. You can see how to use the composite logger here:
http://www.msextra.com/doc/ms2extra/MS2-Extra_tooth_logger.html
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me
look
up
our conversation and reply faster, as I'm usually assisting several
customers.
On 5/9/2011 6:21 PM, AL GURDIAN wrote:
okay here is the file
Date: Mon, 9 May 2011 16:25:05 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no
Spark
Connect TunerStudio to the MS and go to File -> Save
Tune As.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me
look
up our conversation and reply faster, as I'm usually assisting
several
customers.
On 5/9/2011 2:43 PM, al_gurdian@msn.com wrote:
Where would I find the Ms file?
Sent via BlackBerry by AT&T
-----Original Message-----
From: "DIYAutoTune.com Sales
(Matt)"<websales@diyautotune.com>
Date: Mon, 09 May 2011 14:15:00
To: AL GURDIAN<al_gurdian@msn.com>
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1...no
Spark
Aaron's settings appear to be for an older firmware variant.
Could you
please email me a copy of your MSQ file? I'd like to start
by
checking
your settings.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help me
look
up our conversation and reply faster, as I'm usually assisting
several
customers.
On 5/8/2011 12:40 PM, AL GURDIAN wrote:
Hi Matt ..I finished the assembly and did all the Tuner
Studio
pre configured settings based on Aaron Cakes MS2 page
Plugged it in and ...Nothing ! Of Course it cranks but it
wont
start .......Only a years work of painstakingly trying to prevent
this
embarassment and I get it anyway
I checked for spark on each plug as I could smell the fuel
...they are all dead ..what did do wrong?
Where do I start to troubleshoot this ??
i purchased the registered versions of both mega logger and
tuner studio ..
Date: Fri, 6 May 2011 16:57:52 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1
That depends, do you have an output curve for it?
The Mazda gauge is not connected to the ECU in any way.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will help
me
look up our conversation and reply faster, as I'm usually assisting
several customers.
On 5/6/2011 2:31 PM, AL GURDIAN wrote:
Hi Matt
I have an AEM temperature gauge with a RS232 input? and a
0-5
volt output ..can this connect to the DIYPNP CPU ?
Mazda Temp gauges are pure crap so it would be great if i
could wire this in
How would i do so? ...would this then render the mazda
gauge
dead? or can i still have both?
Date: Fri, 6 May 2011 13:54:36 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1
Yes, you can remove the AFM. Maybe easier to set it up
with
the AFM
first and then remove it when it's running on the MS.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will
help me
look up our conversation and reply faster, as I'm usually assisting
several customers.
On 5/5/2011 10:19 PM, AL GURDIAN wrote:
THANKS MATT
with this megasquirt set up can I remove my AFM ? how
would
you suggest doing it ..set up with the afm first then try to remove
it?
After I finish the soldering corrections ..can I
plug
it in the car and set up the laptop ..or do I have to do more ecu
configurations ON TUNER STUDIO ?
Date: Thu, 5 May 2011 15:11:25 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version 1.1
That is correct.
Thanks,
Matt Cramer
DIYAutoTune.com
Please quote your message when you reply. This will
help
me look up our conversation and reply faster, as I'm usually
assisting
several customers.
On 5/5/2011 2:03 PM, AL GURDIAN wrote:
Hi Matt
I used a diode from the IAC output to 12 volts,
banded
end toward
12 volts. Is The R5 slot located in the 10 pin
center
header ?.... which is what I used
Also ...Yes the AEM has two analog wires one is
output +
(white ) and the other is Output - (brown)
So I should ground brown wire to SG ..correct?
Date: Thu, 5 May 2011 13:04:20 -0400
From: websales@diyautotune.com
To: al_gurdian@msn.com
Subject: Re: Diypnp help 1990 mazda rx7 NA Version
1.1
You'll need a diode from the IAC output to 12 volts,
banded end toward
12 volts. The R5 slot is a convenient place for it.
I would not ground the AEM to SG; use regular ground
unless it has a
separate analog ground. (I'm pretty sure they
don't).
The AEM analog
output positive wire goes to O2. No problem with
wiring
the AEM to the
DB15; we used a similar approach with an LC-1.
Thanks,
Matt Cramer
DIYAutoTune.com
--------------------------------------------------------------------------------
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AL M GURDIAN |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Jan 29 2012 : 10:20:41 AM
|
quote:
Originally posted by AGURDI590
Ha ! A C thanks for letting me down lightly! Really its not that bad I drive it daily and it only breaks down once a month..just did the water cleaning trick to it cause my FD buddy said my cold start one rotor flooding issue sounded like a sticking apex seal. The Throttle body mod is the standard remove the front throttle plate and seal the holes. the thermal wax pellet was removed.
Except on the NA, you don't gain anything by removing the tertiary throttle plates. They are just there to prevent you from going wide open throttle when the engine is cold. The water thermo valve allows vacuum pressure to an actuator which pulls them closed. Then as the valve opens up due to coolant temperature increasing, the plates are pulled open by spring pressure as the vacuum actuator loses vacuum. Of course without the thermowax, you need to resort to such interesting tactics as a "choke" cable to hold the throttle open when the car is cold.
On a standalone like the Megasquirt, the BAC supersedes the thermowax so the missing thermowax isn't a big deal (I normally remove it when installing a standalone).
quote:
a hot afternoon. as for the DIYPNP
I will send you the entire converation I had with DIY Autotune
I can't read all of that right now, but I will be on a flight later this week where I will have nothing to do but read it.  |
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AGURDI590
Apprentece
USA
19 Posts |
Posted - Jan 29 2012 : 10:58:18 AM
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| No problem enjoy your trip! .. Please note: My interesting tactic was not my Idea it was Mazdas ..cause I remember my dads rx2 had a choke!! |
AL M GURDIAN |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Feb 02 2012 : 10:11:14 AM
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| An RX-2 was carbureted, hence the need for a choke. EFI systems shouldn't require such hacks. |
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AGURDI590
Apprentece
USA
19 Posts |
Posted - Feb 04 2012 : 6:09:25 PM
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| True ..a modern EFI system ..not this one |
AL M GURDIAN |
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AGURDI590
Apprentece
USA
19 Posts |
Posted - Mar 15 2012 : 08:02:58 AM
|
| Hi AC ..guess you never got back from your trip?? ..I think I found out why my fuel rail presure drops to zero ..I added a pair of BMW checkvalves in the fuel line one just after the fuel pump and one just before the metal fuel line on the engine after the fuel filter with a gauge in the middle. It holds pressure for two to three seconds after shut down, then I hear a clicking noise and pressure drops to zero ..I traced this to the fuel pump relay resistor. Is this normal operation for the relay resistor, or should I look at the cpu? I know your busy but if you could look at my megasquirt email trail I would truly appreciate it |
AL M GURDIAN |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Mar 17 2012 : 10:43:12 AM
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Shit, I actually just totally forgot. After the vacation it was auto show after auto show after auto show, then I got back on the Cosmo. I'll read up on your email exchange within the next few days.
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AGURDI590
Apprentece
USA
19 Posts |
Posted - Apr 18 2012 : 08:29:49 AM
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| Hey No problem I know you got a shit load of stuff goin on ..running water thru the engine once a month ....now it starts fine cold and hot! ..got mu 460 injectors back and will set some time to install them. still cant hold line pressure more than a few seconds I hear a clicking noise and pressure drops to zero ..I traced this to the fuel pump relay resistor. Is this normal operation for the relay resistor? |
AL M GURDIAN |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Apr 22 2012 : 10:33:45 AM
|
| I did look up the fuel pump in the L-Jetronic manual and indeed, there is a check valve in the pump. So it should hold pressure for quite a while after it stops drunning. The ECU will cut the fuel pump once it no longer receives a signal from the AFM that the engine is running so that part sounds normal. |
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AGURDI590
Apprentece
USA
19 Posts |
Posted - May 19 2012 : 11:23:53 AM
|
Hey AC ..been driving the car daily. She's running as good as ever . The only issue I have is that I have no line pressure after she shuts down and this is after installing two check valves in the line one after the fuel pump and one before the injectors. so cold starts take 2 to 3 attempts. As I mentioned it holds line pressure for two seconds after shut down and then I hear a clicking noise from the fuel pump relay resistor and the pressure drops to zero . so my guess is that the pressure is being released after the injectors.
Would you suggest I move the second check valve to after the injectors bunt before the adjustable fuel pressure regulator.
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AL M GURDIAN |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - May 20 2012 : 10:32:36 AM
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| What aftarmarket FPR do you have? Some of them drop pressure as soon as the pump stops. My Aeromotive does. |
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RX7 Turbo II Strange Hot Start
