Wht else..Idle problems...

Originally posted by koolone:
Still searching for wht changes when it goes frm cold to hot???
Jim

Just a thought...water pump loading belt affecting??? voltage?

Regards

Originally posted by Sqrlcage:
Just a thought...water pump loading belt affecting??? voltage?

Regards

I just replaced the timing belt, drive belts and water pump last spring....Not sure that is the problem. But hey thank you.
Jim

When I suggested "base throttle blade" setting...that's engine off and the preset distance the throttle blade is set "FROM THE FACTORY" that is set by the "set screw" that isn't supposed to be touched...might want to ck and see if it's been tampered with...I'll try and take a few minuetes tomorrow and ck a few on my cars and come up with an average between them all. Also, my red 88 developed a serious idle flucutation and I thought the TPS was taking a walk...well I ck the original...was at .98 and set the new one to the same...IT DIDN'T LIKE IT!!! had to reset to .72 and have had no more problems at all. Again...if the base throttle is within spec and everything else being equal...I'd throw a Processor/computor at it if ya have a spare sitting around...and if not might not be a bad idea just to have a spare just in case...like I said ...I'll ck throttle settings here tomorrow and get back...just reread posts and didn't see a HEGO in the list??? if ya got one try that...O2 is closed loop...

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Garry McVey "BIRDS OF A FEATHER" Birdoprey always in flight... TBird TC owners are usually wingin' it
TC's 83 project, 86 donor for 83, 86 FUN street car,87 RIP, 87 blue to be stock street car, 87 red donor for blue and others, 87 red daily driver, 88 street and strip HALF WICKED right now, 87 XR4ti project,80 pinto wgn project

Pete if it was a ground problem.....I think it would show up a all times???????

I'm not saying it is a ground problem. Only that grounds are under rated and they can cause funny things

Originally posted by turbocoupes:
When I suggested "base throttle blade" setting...that's engine off and the preset distance the throttle blade is set "FROM THE FACTORY" that is set by the "set screw" that isn't supposed to be touched...might want to ck and see if it's been tampered with...I'll try and take a few minuetes tomorrow and ck a few on my cars and come up with an average between them all. Also, my red 88 developed a serious idle flucutation and I thought the TPS was taking a walk...well I ck the original...was at .98 and set the new one to the same...IT DIDN'T LIKE IT!!! had to reset to .72 and have had no more problems at all. Again...if the base throttle is within spec and everything else being equal...I'd throw a Processor/computor at it if ya have a spare sitting around...and if not might not be a bad idea just to have a spare just in case...like I said ...I'll ck throttle settings here tomorrow and get back...just reread posts and didn't see a HEGO in the list??? if ya got one try that...O2 is closed loop...

Hey turbocoupes,
Sry I misunderstood u about the blade... I'll wait to hear back frm u. I do have and changed out both the processor and the 02 sensor. No luck!!! I'll try to set the TPS voltage a little lower and see if that helps.. Thank you very much for your time.
P.S I'm not opposed to taking it to dealer, however I wounder if they have the means of finding a problem on a car this old... Also Pete.. I understand that you were just bringing up the point about the grounds.. That made me look at the elementary schematics to see if I could find a link to my problem.
Jim

[This message has been edited by koolone (edited 05-17-2005).]

about the only thing the dealer is capable of doing is setting up a direct line of credit from your pocket to their bank. [Image: smile.gif]

Originally posted by powered by turbo:
about the only thing the dealer is capable of doing is setting up a direct line of credit from your pocket to their bank. [Image: smile.gif]

Yep ur right..That's why I'm here..+ I like a good challenge...

Didn't get a chance to check throttle bodies this evening...had kids Highschool concerts and a birthday party to go to...I FORGOT! WILL ck forsure tomorrow...

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Garry McVey "BIRDS OF A FEATHER" Birdoprey always in flight... TBird TC owners are usually wingin' it
TC's 83 project, 86 donor for 83, 86 FUN street car,87 RIP, 87 blue to be stock street car, 87 red donor for blue and others, 87 red daily driver, 88 street and strip HALF WICKED right now, 87 XR4ti project,80 pinto wgn project

OK! [Image: biggrin.gif] Ck 3 throttle bodies and the little screw is a Wide Open Throttle stop...BUT... the proper procedure for base idle/throttle is as follows...1-disconnect idle air bypass connector,2-place trans in Nuetral or park and run engine at 2500 RPM's for 30 seconds,3-let engine idle if it stalls turn throttle stop screw 1 turn clockwise and repeat steps 2 & 3,4-place trans in DRIVE (AUTOMATIC) or Neutral (5SPD) 5-ck and adjust idle speed to 625 + or - 25 RPM,engine off reconnect idle air bypass repeat steps until idle speed is maintained consistantly. After doing this procedure I would reck the TPS voltage and reset as neccessary...if this doesn't help ???will keep thinkin'! [Image: biggrin.gif]

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Garry McVey "BIRDS OF A FEATHER" Birdoprey always in flight... TBird TC owners are usually wingin' it
TC's 83 project, 86 donor for 83, 86 FUN street car,87 RIP, 87 blue to be stock street car, 87 red donor for blue and others, 87 red daily driver, 88 street and strip HALF WICKED right now, 87 XR4ti project,80 pinto wgn project

Garry.... I know the Ford base idle spec, but I have cured a few rough or hunting idle problems on both 2.3T and 5.0 motors by setting the base idle speed to 100 to 150 RPM below the hot idle target speed programmed into the PCM. I am guessing the IAC operates "smoother" when it runs at a lower duty cycle.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 23 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car)