'94 mustang gt not firing need help???????? - Page 4

EHardy1971 · 03-26-2009, 04:19 PM

I went through this problem in my coupe with the different EEC's.

http://streetstangs.net/showthread.php?t=10583

natedawgg94 · 03-26-2009, 08:03 PM

i was wrong the car does not have a a9l it has a ecu out of a 94 cobra meant to post that when me and lee were discussing it.

EHardy1971 · 03-26-2009, 08:12 PM

How did you check the TFI module? I know you said you checked it,but it sounds suspect to me.

QWKSNKE · 03-26-2009, 09:01 PM

he swapped it with the one off of his dad's cobra I think

coupe · 03-26-2009, 11:32 PM

Maybe the SN95 Cobra and GT computers have differences like the fox? Where's Dale?

natedawgg94 · 03-27-2009, 04:50 AM

i know there is some differences in the cobras but not sure exactly what other than fuel. this is the same setup i had with the stock motor only thing that has changed is the motor. i know looking back on the thread it seems that the ecu was changed when i did the motor but it wasn't.

QWKSNKE · 03-27-2009, 06:50 AM

Quote:

Originally Posted by coupe

Maybe the SN95 Cobra and GT computers have differences like the fox? Where's Dale?

there are programming differences but not enough where a car will not run.

Typically the pushrod GT and cobra differences are
Fuel mapping
Timing mapping
MAF transfer curve
speed limiters

As i stated though these differences will not cause a car to crank or be driveable, it just won't run efficiently

EHardy1971 · 03-27-2009, 07:39 AM

Quote:

Originally Posted by coupe

Maybe the SN95 Cobra and GT computers have differences like the fox? Where's Dale?

I know for a FACT the wiring harnesses are completely different! I did a V-6 to V-8 swap on a '95 for a guy Geoffrey and I know from work. I acquired a '95 Cobra harness for it,put it in,and it ran like ass. We got another harness from a '95 GT,put it in,and it ran perfect. I read up on those when I did that about three years ago,and there are some differences,but I can't remember what all they are right now though.

natedawgg94 · 03-27-2009, 06:16 PM

k i found a ecu and its on the way should play with the car some tomorrow. did some checking on the relay and they seem to be 80 bucks so hoping its just the ecu.

natedawgg94 · 03-27-2009, 06:52 PM

k just went out to the car when u turn the car on i hear the fuel pump kick on for a minute to prime, the normal lights are on indash. but for some reason the cooling fan is kicking on???? i tried the fuel pump reset in the truck nothing. car spins over fine with no out of the normal sounds. if anyone has any input of questions feel free to call me 256-770-1063

03-26-2009, 04:19 PM	#31
EHardy1971 Trunk Monkey Join Date: Jun 2007 Location: Home Posts: 5,708	I went through this problem in my coupe with the different EEC's. http://streetstangs.net/showthread.php?t=10583 __________________ Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS

03-26-2009, 08:03 PM	#32
natedawgg94 Senior Member Join Date: Apr 2005 Location: Ohatchee, AL Posts: 713	i was wrong the car does not have a a9l it has a ecu out of a 94 cobra meant to post that when me and lee were discussing it. __________________ 1994 Cobra Pace Car #365 of 1000 light mods 1994 mustang GT 3.55's, 331 stroker, 75mm tb, 75mm maf, mac h pipe SOLD (ole yella u will be missed ((>>. Rubbing Is Racing

03-26-2009, 08:12 PM	#33
EHardy1971 Trunk Monkey Join Date: Jun 2007 Location: Home Posts: 5,708	How did you check the TFI module? I know you said you checked it,but it sounds suspect to me. __________________ Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS

03-26-2009, 09:01 PM	#34
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	he swapped it with the one off of his dad's cobra I think __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

03-26-2009, 11:32 PM	#35
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Maybe the SN95 Cobra and GT computers have differences like the fox? Where's Dale? __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

03-27-2009, 04:50 AM	#36
natedawgg94 Senior Member Join Date: Apr 2005 Location: Ohatchee, AL Posts: 713	i know there is some differences in the cobras but not sure exactly what other than fuel. this is the same setup i had with the stock motor only thing that has changed is the motor. i know looking back on the thread it seems that the ecu was changed when i did the motor but it wasn't. __________________ 1994 Cobra Pace Car #365 of 1000 light mods 1994 mustang GT 3.55's, 331 stroker, 75mm tb, 75mm maf, mac h pipe SOLD (ole yella u will be missed ((>>. Rubbing Is Racing

03-27-2009, 06:16 PM	#39
natedawgg94 Senior Member Join Date: Apr 2005 Location: Ohatchee, AL Posts: 713	k i found a ecu and its on the way should play with the car some tomorrow. did some checking on the relay and they seem to be 80 bucks so hoping its just the ecu. __________________ 1994 Cobra Pace Car #365 of 1000 light mods 1994 mustang GT 3.55's, 331 stroker, 75mm tb, 75mm maf, mac h pipe SOLD (ole yella u will be missed ((>>. Rubbing Is Racing

03-27-2009, 06:52 PM	#40
natedawgg94 Senior Member Join Date: Apr 2005 Location: Ohatchee, AL Posts: 713	k just went out to the car when u turn the car on i hear the fuel pump kick on for a minute to prime, the normal lights are on indash. but for some reason the cooling fan is kicking on???? i tried the fuel pump reset in the truck nothing. car spins over fine with no out of the normal sounds. if anyone has any input of questions feel free to call me 256-770-1063 __________________ 1994 Cobra Pace Car #365 of 1000 light mods 1994 mustang GT 3.55's, 331 stroker, 75mm tb, 75mm maf, mac h pipe SOLD (ole yella u will be missed ((>>. Rubbing Is Racing