North American Turbocoupe Organization



check engine light blinking...
V6TBird87 Offline
Posting Freak
#1
i havnt pulled codes yet, just wanted to grab a few ideas before i start tinkering again...especially since its cold out, and im already sick

as of recently, ive been having issues with the car hanging idle at 2000rpms, and sometimes at 3000rpms, and if it give the pedal WOT, it will idle down, and at idle, it gives me a blinking check engine light

yesterday, i adjusted the TPS, got it to about .98v, since my volt meter is digital, i was unable to check for deadspots on the TPS sweep, and i forgot to check WOT voltage

now this issue only happens very occasionally, but if the idle hangs, i can shut the car of, start it back up, and have no issues for a while, and it may do it again shortly after, or there are times where the car will have no issues

at this point, im starting to think its the TPS causing this issue, i have swapped IAC's and cleaned em with no change, so i dont believe those would be the issue

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1987 Thunderbird 3.8
1987 Turbo Coupe, 5-speed

www.foxthunderbirds.fast-go.com

aka Tbird232ci
2018 Mustang GT
1988 Turbo Coupe, 5-speed

aka Tbird232ci
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JT Offline
Posting Freak
#2
Have you pulled the codes? Your blinking Check Engine light (it is an '87, right?) indicates that the system has found a fault.

As far as the TPS, have checked the TPS itself to ensure that there is no breaks or jumps when the throttle is slowly moved?

[This message has been edited by JT (edited 03-10-2005).]
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V6TBird87 Offline
Posting Freak
#3
i havnt pulled codes yet, i havnt felt like sitting in the car, with no heat, and in the 30* weather reading the light just yet

as for the TPS, i wasnt able to check for breaks in the TPS sweep because i have a digital volt meter, and it doesnt "refresh" fast enough, even when moving the TPS very slowly

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1987 Thunderbird 3.8
1987 Turbo Coupe, 5-speed

www.foxthunderbirds.fast-go.com

aka Tbird232ci
2018 Mustang GT
1988 Turbo Coupe, 5-speed

aka Tbird232ci
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JT Offline
Posting Freak
#4
i missed the part about the digital meter in your original post.

i would make sure that your TPS voltage is still under 1.0V, or you could have hanging high idle issues.

i don't know what you can really do until you check to see what trouble codes the EEC is reporting, as well as the TPS itself.

Any other issues? For some reason i'm kind of thinking you may see some certain EEC codes, but i could be wrong.
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V6TBird87 Offline
Posting Freak
#5
i havnt had any other issues, i did recently break the vacume line for my EGR, so i just capped it on the vacume tree, but i had this issue before i broke the line, so i have a good feeling they arnt related


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1987 Thunderbird 3.8
1987 Turbo Coupe, 5-speed

www.foxthunderbirds.fast-go.com

aka Tbird232ci
2018 Mustang GT
1988 Turbo Coupe, 5-speed

aka Tbird232ci
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jmthunderbirdturbo Offline
Posting Freak
#6
sme thing on goldie, probably tps. i know its cold, but you need to run codes.

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1987 5.0 sport coupe, intake, exaust.
1987 tc, goldie, stock 5 spd.
1987 3.8, convertabird project car.
without disapointment, you cant appreciate victory, but victory would be nice every now and again.
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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Blue88TC Offline
Member
#7
if its to cold for you little baby bring it to my shop and we'll look at it, lol...give me a call
1988 turbo coupe, ported head, big valves, RW #1 cam, adj cam gear, front mount, ported intake, gillis, k&n cone, exhaust
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Ryan H Offline
Posting Freak
#8
.98 was too high for my car. I had to set it around .91 to get it to stop stalling and idling high at random.

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Ryan Harris

1988 TC 5 speed, all options including sunroof, Walbro 255 LPH HP, Star stage III, bypassed BCS and lots of love Big Grin
'88 TC Smile Walbro 255HP, Stinger FMIC, PIT BOV, Pro 5.0, Kirban, RR cam, FRPP strut tower brace, T3
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Turboy Offline
Member
#9
Mine was doing the same thing - replaced the TPS and the problem is gone for good. My original TPS (factory) always checked OK but caused the problems that you described.....some of the best $40 I ever spent on the car.....
1988 TC 5 spd K & N, Bleeder. Next up - 3" downpipe to 2.5" duals
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Ryan H Offline
Posting Freak
#10
Same here with my TPS, I forgot to mention. I could set the factory one down to .91 or so and it would still act like crap. When I replaced it, it worked perfect [Image: smile.gif]
'88 TC Smile Walbro 255HP, Stinger FMIC, PIT BOV, Pro 5.0, Kirban, RR cam, FRPP strut tower brace, T3
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