North American Turbocoupe Organization



88 Turbo Bird will not start. Have codes Now a Video too UPDATE 8-4-08
Craig Offline
Junior Member
#1
Hi! I bought a 1988 Turbo Coupe and it ran good untill one day it just lost all power! The car started fine went down my drive way stopped and went to leave and it was like the motor had no power it was still running but running rough you know like bad gas so I tryed to rev the rpms up but it really wouldnt go past 1500. After about 3-4 of the car running rough stalling and starting back up the car will not start any more. Now I can spry starting fluid in the air filter and she starts but will die if I dont keep giving it a shot of starting fluid.
I'm new to all of the so I bought a scaner and this is what can up.

41 exhaust gas oxygen sensor voltage signal always lean low value does not switch

42 exhaust gas oxygen sensor voltage signal always rich high value does not switch

63 throttle position sensor signal voltage too low

65 electrical charging system problem occurred voltage to high over 17.5 volts or
engine control system never went into closed loop fuel operation or
transaxle problem- overdrive cancel switch was not cycled during engine run self test

72 insufficent manafold vacuum change detected during dynamic response portion of engine run delf test or problem with message center control assembly- failure in data communications link or
power interrupt detected

I have 1.02 volts on the TPS and 12.09 volts on my batt.

These codes came with the scanner I got(code book). So where should I start to trouble shoot?
Thanks for all of your help This board rocks.
YEAH!!
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5.0TurboCoupe1988 Offline
Posting Freak
#2
do you have fuel pressure?
1988 TC 2.3/5-Speed, 148K
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Pete D Offline
Administrator
#3
If you got fuel pressure then check cam timing.
http://www.turbotbird.com/techinfo/CamTi...t%20Up.htm

Also check all the big hoses are properly located and clamped. Don't overlook the one form the VAM to the compressor inlet
Pete Dunham


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Garrett Offline
Member
#4
i would say change the o2? do you know if it is new/old?

and tps should be .94, but i dont know if 1.02 is a big difference. (pete?)

check your vacuum at warm idle.
88 TC Black/Black Interior, Auto, 2.5" Exhaust w/ Flowmaster, K&N w/ Custom CAI, New Paint, Kicker Sound System, Limo Tint, Smoked Head/Tail Lights, Tripminder, Cobra R
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LightningFastFords Offline
Junior Member
#5
If you are seeing any fouling of the spark plugs..as in being fuel soaked. The VAM could be your problem. If the car is not registering enough air through the VAM..the fuel/air mixture is going to kill it , stall it ..and or make it nearly impossible to start.

If everything else is proven to be operative...try un-plugging the VAM , attempt to start it. If it starts but idles like crap...a bad VAM may be your problem?

Rebuilt VAM's can be bought from NAPA for $119.00 plus shipping costs...they also have a $36.00 refundable core charge.

I have just gone through this whole enchilada within the last two weeks.

The Code 42 with a good 02 Sensor installed can be an indication of this problem.
2000 Crown Victoria (Performance Pkg)
1994 F-150 Lightning ( 5.8L HO )
1994 Bronco ( Eddie Bauer) (5.8L)
1988 Thunderbird Turbo Coupe(5-Spd)
1988 Crown Vic(Police Pkg) 5.8L
1968 Torino GT (Fastback) 351W HP
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Jeff K Offline
Administrator
#6
Your code book is wrong.... there are several codes unique to the 2.3T. For example, CM 72 is power interrupted to PCM when it wasnt expecting it. This code was discussed at length a few years ago... do a search.

TPS base voltage over 1.0 V will cause problems, like hanging high idle, possible rich / lean codes. As noted above, bad VAM can cause idle problems, and rich / lean codes.
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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Dave8338 Offline
Senior Member
#7
WOW...this site with it's collective knowledge is truely awesome! I hope not to need all the info, but it sure is fun to read through the posts and continue to learn the do's and dont's on the TC.
'86 TC: Granatelli adjustible clutch kit, Energy Suspensions, they own me, New KYB's, NOS heater core in the back seat, Chuck Warren Motor Mounts, Wallbro 255, Kirban FPR, New aluminum dual core. The Goal...all I need is the TIME!!
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Craig Offline
Junior Member
#8
Thank you for all the replys
I took a video of the car heres the link.
http://www.youtube.com/watch?v=HtpPtS-ncMM
It looks like it could be the VAM Plesase look at video .Tommorow I will see if it has the right volts and alao adjust the TPS to .96 volts
I hope I can adjust it cause to replace it it will cost 119.00 w/ 50.00 core.
Thank you
YEAH!!
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Gary F Offline
Senior Member
#9
Craig, 5.0TurboCoupe1988 is on to something. I had the exact same symptoms and it turned out to be the fuel pump.
Gary Fraser

I used to be normal...then I got a Turbo Coupe.
'88 T5 Bone Stock w/3G Alt.
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LightningFastFords Offline
Junior Member
#10
Craig,

Has the factory seal on your VAM's top cover been broken?

My VAM had been toyed with by the previous owner..and he neglected to re-seal it afterwards.

My VAM's internals were corroded , rusted and basically shorted out and shot to hell.

I hope for the sake of cost and time...yours turns out to be something else , other than the VAM or a fuel pump.

The fact the the car runs with the VAM un-plugged as I suggested trying is somewhat telling , but possibly not the end all answer.

I also had to replace a brand new Motorcraft TPS that was bad from stock. The internal return spring was bad.
2000 Crown Victoria (Performance Pkg)
1994 F-150 Lightning ( 5.8L HO )
1994 Bronco ( Eddie Bauer) (5.8L)
1988 Thunderbird Turbo Coupe(5-Spd)
1988 Crown Vic(Police Pkg) 5.8L
1968 Torino GT (Fastback) 351W HP
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