North American Turbocoupe Organization



Update on Hesitation after 4000rpm please read everyone
Ohio88TC Offline
Senior Member
#1
It is still doing it. Can't explain it. I have changed

All Motorcraft
Plugs
Cap
Rotor
wires
Fuel Filter -About 3 weeks ago and ran fine.

T-Stat.

And now I am running out of optioins. It just bucks like crazy after 4000rpm. And the car doesn't have to be moving it can be sitting there and does it. It leads me to belive it isn't an ignition problem but more of a fuel problem. I am wondering if it is either the TPS or the Fuel Regulator. This problem just started last week.

Anybody with any ideas please help? I drive up to Ann Arbor everyday for work and need this car in good running condition. Thanks everybody.
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Pete D Offline
Administrator
#2
How old is the fuel pump? I can send you the fuel diagnostics later today. You can check the TPS but I doubt that's the problem. If you can nurse it through to the weekend and get it to my place, we can check the fuel system.

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NATO Member. it's not a vice, it's an obsession
"The nice thing about each new day is nobody ever used it before" Barnaby Jones
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Ohio88TC Offline
Senior Member
#3
Pete sounds like a good idea i am pretty sure i can nurse it out to your place.

I will let you know
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Ohio88TC Offline
Senior Member
#4
^^^^^^^
bump

and now it is starting to stall when i come to a stop. Still don't know why. Also what is the hose that comes off of the IC to the turbo inlet. This hose is broken and now i have no boost. Also it seems to be a bigger diameter at the IC and then a smaller one when it gets to turbo inlet. Where can I find that hose at? Also is there anyway to relocate the BAP and ECT to a different location? If so where and will I have to seperate the two?
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SteveX82 Offline
Posting Freak
#5
Quote:Originally posted by Ohio88TC:
^^^^^^^
bump

and now it is starting to stall when i come to a stop. Still don't know why. Also what is the hose that comes off of the IC to the turbo inlet. This hose is broken and now i have no boost. Also it seems to be a bigger diameter at the IC and then a smaller one when it gets to turbo inlet. Where can I find that hose at? Also is there anyway to relocate the BAP and ECT to a different location? If so where and will I have to seperate the two?

I think you might have just answered part of your own question. Cars tend not to like vaccuum leaks, and they like boost leaks even less. If this hose has been leaking boost for awhile now, I wouldn't be surprised if that was causing your engine miss. Of course, that doesn't explain why it didn't happen below 4000rpm.
Estoril blue 1987 TC 5spd, 148k mi, a237, Bailey BOV, spec stg3 clutch, spearco FMIC, 50 trim t3/t4, 3" exhaust, Bamafuel, LM1, 55pph
Best 1/4 mile: 12.31 @ 110mph on 25psi
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Pete D Offline
Administrator
#6
The hose from the turbo inlet to the intercooler is a vacuum source for the speed control whenever there is positive pressure (as in boost or lack of vacumm) in the intake manifold. Yes it's a bastard sized hose and no I don't know where to get one, other than another TC. Maybe someone else has an answer on that. I know both of mine are pretty rough.

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NATO Member. it's not a vice, it's an obsession
"The nice thing about each new day is nobody ever used it before" Barnaby Jones
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Alaskanzeus Offline
Senior Member
#7
When I first bought my TC I did the same changes as you did but it bucked as i drove it. Turns out it was my Ignition Switch Module and had to be replaced= buck gone. Just a stab out it, good luck.
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