North American Turbocoupe Organization



A new problem
mikeL Offline
Junior Member
#1
need help!! my car has been acting up. here is the situation. after driving the car for a while lets say I drive the car for a couple of hours (start and stop the car periodically) after this time when I try and turn the car on it barely stays on and seems like it is starving for fuel and when I hit the gas there is no response. it just idles around 200 to 300 rpms and wants to turn off. I just tuned it up and change the external fuel pump as well as a new IAC about two months ago. *but it will run and idle really good after the car cools down/sits for a while. today, when after trying to start the car it did the same thing starving for fuel (after driving about 20 miles). I pumped the throttle until I was able to get it up to idle but after driving the car for about 10 minutes I came to a stop and the idle basically jumped for a slight second from 1000 rpms down to about 800 rpm and back up. when I gave the car gas it pretty much sputtered. I stoped the car for about 10 minutes and took off again. when I came to a stop the idle jumped up and down starving for fuel and just shut off. I couldn't get the car started after this. I basically let the car cool down and sit for about an hour and it fired right up-idled and drove fine. Can anyone give me some info. as to what seems to be happening?

Mike
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jmthunderbirdturbo Offline
Posting Freak
#2
most likely the TFI module. they get more and more responsive to heat as they get old. this is the grey metal and plastic thing on the distributor. unplug it, remove it using the special star bit tool, and have it tested at your local parts house. if it checks out, replace it anyways, as they are cheap, and hard to get at(might as well). but continue to look for your problem, if it doesnt go away.

-J0N
APRIL 2018 - LOOKING FOR A NEW CAR. PM me if you have an 87-88 roller or cheap TF for sale.
1988 TC 5MT-Blue/Blue check-off car. resto-project.
2006 Honda Odyssey 5AT, baby-mobile.
2013 F-150, 5.0, 6AT, 4x4, snow white paint.
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Jeff K Offline
Administrator
#3
Yup, sounds like classic symptoms of the TFI / PIP on the way out. FYI, Ford recommends that both the TFI and PIP be replaced if either one fails.

IMO, removing the TFI and having it tested is basically worthless. When a TFI is failing, it typically doesnt show symptoms until it gets good and hot, but behaves normally if it is cool. Having a cold TFI tested will tell you nothing about how it behaves when it is hot. About the only thing testing the TFI will tell you is if it is totally dead.
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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thejon1880 Offline
Member
#4
i have the same kind of problem, would the TFI and PIP cause me to loose power at higher rpm and boost. The car also jumps when i let off the throttle, and very bad idle, i have a new IAC and TPS comming...im concerned that im putting parts on the car that i dont ness need, i used a digital multimeter on the tps and ran the test on it, ive been told that i need an analog tester to find dead spots!
87 Turbo coupe-5 spd-gillis valve-custom hood-K&N in front bumper-and one PORLY running engine.
http://www.cardomain.com/ride/340516
Check out the Turbo Bird
LONG WORK IN 0PROGRESS-DONATIONS WELCOME!
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Pete D Offline
Administrator
#5
thejon, does it have a problem only after it warms up or does it do it cold? Have you pulled any codes?
Pete Dunham


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thejon1880 Offline
Member
#6
well when the car first starts up no it idles kinda good, however the high boost/rpm problem persists...but i have the idle kinda under control... i havnt pulled codes yet but i promise to on monday....ill post results...thanx
87 Turbo coupe-5 spd-gillis valve-custom hood-K&N in front bumper-and one PORLY running engine.
http://www.cardomain.com/ride/340516
Check out the Turbo Bird
LONG WORK IN 0PROGRESS-DONATIONS WELCOME!
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Jeff K Offline
Administrator
#7
Look for CM codes 14 (intermittant loss of PIP signal) and/or CM 18 (intermittant loss of IDM signal)
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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thejon1880 Offline
Member
#8
Problem fixed with no pip code,= new IAC, Motorcraft wires, Autolite plugs,dist cap and rotor......problem solved..COMPLETLE
87 Turbo coupe-5 spd-gillis valve-custom hood-K&N in front bumper-and one PORLY running engine.
http://www.cardomain.com/ride/340516
Check out the Turbo Bird
LONG WORK IN 0PROGRESS-DONATIONS WELCOME!
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