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Author
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Topic: TPS voltage
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darien87
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Member # 2022
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posted
 
 
I'm trying to fix the damn idle problem that so many people seem to have.
What my car does is wants to idle around 1,500 RPM's. If I tap the gas, it will come back down to 900 or so. But usually within 10 seconds or so, it will jump back up to 1,500.
I've done the 10-pin cleaning, APEX Motorsports supposedly replaced my TPS. Today I tried setting the voltage. When I first probed the TPS I got a reading of .74 volts. I've read that it's supposed to be between .94 and .98. So I got it to .95, then opened the throttle and watched the voltage increase. But when I released the throttle cable, the voltage went back down to .85! I increased it to .95 again and drove the car around a bit. The quirky idle was still there. When I got home, the TPS voltage was back down to .85!
The TPS is only a few months old. Why won't it keep the voltage I keep setting it at? I've tightened the screws down about as much as I can. I don't want to strip the damn things.
I know that if the TPS voltage is too high it causes a high idle, but does it also screw up the idle if it's too low?
Posts: 206 | From: South Bay Area, CA | Registered: Oct 2002
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JoeT
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Member # 298
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posted
scan for your codes, hi/low TPS will trigger a code.
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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Stimson
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Member # 51
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posted
.75 to .85 are good TPS levels. Have you cleaned your IAB? Is your MAF sensor good?
Posts: 2373 | Registered: Jun 2000
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darien87
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Member # 2022
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posted
Unfortunately, I don't have a code scanner. Guess I should get one. I was just about to go clean my IAB. My MAF should be good. It's a Pro-M Bullet 75mm, only a couple of months old.
Posts: 206 | From: South Bay Area, CA | Registered: Oct 2002
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darien87
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Member # 2022
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posted
Well, cleaned out my IAB and the car idled great tonight. Figures it would be the last thing I check. I guess I didn't let the IAB dry out all the way though, cuz I got kinda freaked out when I started my car and a huge James Bond smoke screen of white smoke came out of my tail pipes, lol. Went away after a few minutes. It was embarassing as hell though.
Thanks for the suggestions guys.
p.s. st5150, I take it you're a Prince fan? Me too, seen him in concert about 4 times.
Posts: 206 | From: South Bay Area, CA | Registered: Oct 2002
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Stimson
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Member # 51
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posted
You don't need a code scanner for '86-95 Mustangs!
A simple piece of wire would do. Ask AaronC on here, I once scrounged the ground for a piece of metal and pulled codes for him at the track.
http://www.corral.net/tech/maintenance/eecivtest.html
As for Prince, yeah, I'm a huge Prince fan and a huge 2pac fan...I have a ton of unreleased stuff by both of them on my computer if you want to trade, but make a post in general talk or email me about it ![[Cool]](cool.gif)
Posts: 2373 | Registered: Jun 2000
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darien87
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Member # 2022
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posted
Well that would be hella handy, but of course I have a digital voltmeter, not analog. Oh well. Maybe I'll go buy one of those.
Posts: 206 | From: South Bay Area, CA | Registered: Oct 2002
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