glenn-tc88
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Joined:
Nov 2010
Florence, NJ
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when it idles high tap tps lightly and if it idles down its tps. mine did same swapping tps fixed it.
Glenn Dembowski
2003 Mercury Marauder Black
1988 Thunderbird TC Sandalwood 5sp
1974 Harley Davidson FLH
1998 Chevrolet K1500
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(06-27-2020, 02:16 PM)glenn-tc88 Wrote: when it idles high tap tps lightly and if it idles down its tps. mine did same swapping tps fixed it. Thanks Glenn !!! Makes sense to me. Won't get to it till next week & wiil post results then.
Thanks again !
mike
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vegas_ss
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Joined:
Jun 2005
Las Vegas, NV
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I get the random high idle occasionally... usually notice it happening after a freeway drive. I do have a manual so it's not a big issue for me. Usually shutting off and restarting cures the issue. Other times just driving a bit takes care of it. I did replace the VAM about a year ago for a different issue, that didn't have any effect on the random high idle as it has been occurring for several years but not often enough for me to remember checking it out. Getting old I also get forgetful 
1987 TC, 5sp, Boport Stage 3 Head/2.1 Cam
1996 Impala SS, DCM, Borla Cat Back, too much other stuff!!! (SOLD)
2009 Pontiac G8 GXP 6M, 6.2l LS3, Kooks Long Tube, Hi Flo Cats, Mild Cam
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BJL
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Joined:
Apr 2001
Williamstown, New Jersey
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typical TPS getting a lil wacky. try resetting base TPS setting or buy a new TPS.
Brian Larkin
88TC 330,000 miles
Slightly Modified
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(06-28-2020, 02:38 AM)BJL Wrote: typical TPS getting a lil wacky. try resetting base TPS setting or buy a new TPS. Did the reset to .94 v as Jeff K suggested.....helped, but didn't last long. It idled fast when i had the hood up, tapped the tps as suggested & it came right down.My Ford dealer is getting me a new tps.
Thanks EVERYONE !!!!mike
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anasazi4st
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Joined:
Feb 2015
Phoenix, AZ
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(07-06-2020, 02:09 PM)t c mike Wrote: (06-28-2020, 02:38 AM)BJL Wrote: typical TPS getting a lil wacky. try resetting base TPS setting or buy a new TPS. Did the reset to .94 v as Jeff K suggested.....helped, but didn't last long. It idled fast when i had the hood up, tapped the tps as suggested & it came right down.My Ford dealer is getting me a new tps.
Thanks EVERYONE !!!!mike
Yeah sadly like so many, this pretty much has to be a Motorcraft part. I had problems with 3rd-party ones as well.
Another proud dues-paying member.
1987 Turbo Coupe w/T5OD, 8.8 axle, grey smoke; most options. Got it in 1991 with 41K miles: 3 turbos, 2 heater cores, 3 T5OD full rebuilds, 6 clutches, 1 head gasket, 2 Teves II ABS units, etc. later....
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Update : new tps installed, voltage @ ,94, iac cleaned w/new gasket. Dual exhaust completed and my Turbo Coupe runs GR8....finally.
Adding duals & non chambered mufflers lets boost come much sooner. Love it. Next will be manual boost control, but won't crank in too much since it has auto trans.
I just want to drive it......
Thanks to all !!!
mike
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Where can I get a new motorcraft IAC for my 88 tc? I would pay good money for one.
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