North American Turbocoupe Organization



88 Turbocoupe Won't Start....
Trickie67 Offline
Junior Member
#1
I have an 88 Turbocoupe that was running fine one day and the next day started having problems getting started. On cold starts I have to try starting it quite a few times as it usually dies shortly after it starts idling if it ever starts up at all. If it does continue to run it will stumble and run really rough and then just die. After the car is warmed up theres no starting it at all. I've cleared and ran codes numerous times but never get anything back besides a code 34 on the KOER test, but never anything pertaining to any other sensors. When I'm having a hard time starting it I can unplug the VAF and it'll start up but i dont wanna drive it and get stuck as it wont idle on its own; I have to constantly push the throttle a little to keep it from dying. I've done the VAF diagnosis and it seems to check out ok but I only have a Fluke meter that reads only in whole numbers.

Can anyone please help me get this car squared away?

Thanks,
Jeremy
2008 GT Mustang
1988 Thunderbird Turbo Coupe
1967 Blown Alcohol Mustang
1993 Ford F350 Dually Banks Turbo Powered Diesel
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Not B Anymore Offline
Administrator
#2
Try running fuel system/pump diagnostics...

http://www.turbotbird.com/techinfo/Fuel_...ostics.htm

http://www.turbotbird.com/techinfo/Fuel_...ostics.htm
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
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Paulie Offline
Banned
#3
Code 34 is an EGR on off code i think?? Remove the vacuum hose from the EGR valve and make sure their is no vacuum at idle. If their is vacuum the relay is messed uo or commanded on at the wrong time. Their is a big trouble shooting page on this code in the ford book. If the egr valve is working properly we can go further with other tests. but check the EGR operation first Good luck

34 is an EGR signal failure so it may not effect your problem. Just the operation of the EGR valve Check it??
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Trickie67 Offline
Junior Member
#4
Thanks for the links. The pump does come on. I am waiting on my brother to return my fuel pressure gauge to check that. The only thing that stumps me about it being a fuel issue is if it were, why does it run with the vaf unplugged when it wont run with it plugged in?

Oh and I wanted to add it always has spark warm or cold.

Thanks,
Jeremy
2008 GT Mustang
1988 Thunderbird Turbo Coupe
1967 Blown Alcohol Mustang
1993 Ford F350 Dually Banks Turbo Powered Diesel
Reply

Trickie67 Offline
Junior Member
#5
So can the EGR be causing this problem? It's really hard to get it to idle, but I will try that. I dont have a vacuum gauge, will it be pulling strong enough to feel it by hand?

Thanks,
Jeremy
2008 GT Mustang
1988 Thunderbird Turbo Coupe
1967 Blown Alcohol Mustang
1993 Ford F350 Dually Banks Turbo Powered Diesel
Reply

Paulie Offline
Banned
#6
Run the pump from the ALDL connector and when you get your gauge back check presure. If the EGR is closed and no vacuum at the valve it should not effect your problem. Code 34 monitors the solenoid operation according to the ford troubleshooting chart.
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Trickie67 Offline
Junior Member
#7
As far as I can tell without a gauge it isn't pulling vacuum but I can't get the car to idle for longer than 15 seconds so I can't check it after it has warmed up. I will post the fuel pressure as soon as I'm able to check it.

Thanks,
Jeremy
2008 GT Mustang
1988 Thunderbird Turbo Coupe
1967 Blown Alcohol Mustang
1993 Ford F350 Dually Banks Turbo Powered Diesel
Reply

Not B Anymore Offline
Administrator
#8
How does it run with the VAM unplugged? When you said it won't idle on its own, was that both with and without the VAM plugged in?
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
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Not B Anymore Offline
Administrator
#9
And try puling the vacuum line off of the regulator and smell for gas. If it's wet inside or there is a strong fuel odor it's probably bad.
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
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Paulie Offline
Banned
#10
Quote:Originally posted by B:
And try puling the vacuum line off of the regulator and smell for gas. If it's wet inside or there is a strong fuel odor it's probably bad.
Good point B those DAM regulators fail like that and cause All types of problems
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