North American Turbocoupe Organization



Help - Runs real bad until warm
Quick 8 Offline
Member
#1
Hello all..

I'm having some problems I need help with. My engine runs real bad until it is warm. It runs exactly like a carburator without a choke. It chugs,jerks, and coughs and won't accelerate.

There are no codes. I tried replacing the ECT, but there was no change. I cleaned the IAC and checked the TPS.

I'm not sure where to go from here.

Got any ideas?

Thanks,
Jim
-Jim Lamb
88 TurboCoupe
63 Falcon
68 F100
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Pete D Online
Administrator
#2
Codes?
http://www.turbotbird.com/techinfo/Retri..._codes.htm

Jim, might help if you would put some of the basics about your car in your signature. Year and major equipment and mods may help getting needed responses.
Pete Dunham


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Quick 8 Offline
Member
#3
Thanks for the reply Pete.

You must have missed it, but I mentioned it has no codes. Well, actually it had code 34, but it had the recall done, which I understand trips code 34.

The car is an 88 TC with a 255 walbro pump, kiban reg, and manual boost controller. Currentl set at 14 psi max.
-Jim Lamb
88 TurboCoupe
63 Falcon
68 F100
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Pete D Online
Administrator
#4
My bad on the codes.
What is your base fuel pressure set at? What was the last thing that happened before this started?
Pete Dunham


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Quick 8 Offline
Member
#5
The fuel pressure is 39 with the hose off. The last thing I did when this started is lower the pressure to 39. When I originally installed the pump and regulator, I set it at 45. It then crept up to 48 for some reason?! It gave me a code 42. When I lowered it to the stock rating, the code went away, but it started running like crap before it was warmed up.
-Jim Lamb
88 TurboCoupe
63 Falcon
68 F100
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Jeff K Offline
Administrator
#6
Do you have any kind of AF gauge? Even if it is just a narrow band?
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Quick 8 Offline
Member
#7
Yes, I have an Innovate wide band that I use to tune carburetor cars, but There is no extra bung in my exhaust for it, So I don't know how I can use it. The car runs just like it is too lean when it is cold.
-Jim Lamb
88 TurboCoupe
63 Falcon
68 F100
Reply

Quick 8 Offline
Member
#8
Does anyone have any ideas?
-Jim Lamb
88 TurboCoupe
63 Falcon
68 F100
Reply

Pete D Online
Administrator
#9
This condition is often a bad sensor. I see you changed the ECT, which can cause this. Did you get a good brand replacement? I found out the hard way this is not one to get the cheap replacement
Pete Dunham


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Quick 8 Offline
Member
#10
I believe it was an echlin from NAPA.
I replaced it because I was guessing that the computer used the ECT to determine whether the engine was cold or not, and if the mixture needed to be on the rich side. When it didn't change how the car runs, I didn't know what to think. I guess I could try another brand. Does motorcraft still make one that fits?
-Jim Lamb
88 TurboCoupe
63 Falcon
68 F100
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