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tps voltage

  • tadpole19
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8 years 5 months ago #8230 by tadpole19
tps voltage was created by tadpole19
ok i have a 2001 ford mustang gt 4.6 2v , my question is what should my tps voltage be at when idleing, ?the idle screw had been turned by guy i purchased it from , he had a bad iac and thats reason he adjusted the screw, should i do a base idle reset and put my multimeter on the tps as i adjust tb screw to set it correctly to correct tps voltage?

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8 years 5 months ago - 8 years 5 months ago #8231 by tadpole19
Replied by tadpole19 on topic tps voltage
also this is a non slotted tps on the 2001 gt
Last edit: 8 years 5 months ago by tadpole19.

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  • ScannerDanner
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8 years 5 months ago #8235 by ScannerDanner
Replied by ScannerDanner on topic tps voltage
Disconnect the IAC electrical connector and set your min idle speed first, then recheck TPS closed position. You also may want to do a battery disconnect when your done.
As I said in that YouTube comment, Ford TPS closed throttle voltage is usually around 1 volt.

Don't be a parts changer!

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8 years 5 months ago #8236 by ScannerDanner
Replied by ScannerDanner on topic tps voltage
I think it was this video you asked the question on right?

Don't be a parts changer!

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  • Tyler
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8 years 5 months ago - 8 years 5 months ago #8247 by Tyler
Replied by Tyler on topic tps voltage

ScannerDanner wrote: Disconnect the IAC electrical connector and set your min idle speed first, then recheck TPS closed position. You also may want to do a battery disconnect when your done.
As I said in that YouTube comment, Ford TPS closed throttle voltage is usually around 1 volt.


Sage advice right here. Ford uses a 'ThrPosMODE' PID, which is based entirely on the TPS reading when the key is turned on. If you change the idle speed OR the TPS without relearning this PID, the PCM will think you're off idle at all times, and never idle right.

Here's an example of some data from an '03 Crown Victoria:

Attachments:
Last edit: 8 years 5 months ago by Tyler.

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8 years 5 months ago - 8 years 5 months ago #8252 by tadpole19
Replied by tadpole19 on topic tps voltage
yes sir sure was that video , ok so just need to make sure that the tps voltage is at 1 volt or under that just a tad with key in the on postion correct? ok and from what i gather on the base idle set, i first clear my keep alive memory which i can do with my sct tuner, then unplug iac connector, crank car and set idle so that the motor just idles with it almost to stalling point,check tps voltage, then cut car off wait 2 minutes ,then reconnect iac recrank and let it relearn the idle correct?

i have been useing this to do the base idle reset all but the battery dissconecting part , because i can clear kam with tuner

How to do it
1. Disconnect the battery's negative terminal to reset/clear the computer's memory. Leave it disconnected for 30 minutes. WARNING: Whenever removing your battery cables ALWAYS disconnect the negative battery cable first and reconnect it last. Otherwise you could destroy your computer or cause a battery explosion.
2. Disconnect the plug going to your idle motor which is located on the front of your throttle body.
3. Reconnect your battery's negative terminal.
4. Start the engine, and set the idle to the rpm you want with the stop screw on the bottom of the throttle body.
5. Turn off the engine.
6. Reconnect the plug on the idle motor
7. Make sure all accesories (radio, blower motor, a/c, lights, etc) are off and start the engine.
8. Let engine run for two minutes.
9. Turn engine off and wait two minutes then restart engine and let idle for two minutes with all accesories on.
Last edit: 8 years 5 months ago by tadpole19.

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8 years 5 months ago - 8 years 5 months ago #8273 by tadpole19
Replied by tadpole19 on topic tps voltage
well today i got out and tried to adjust the idle lowest i could get the tps voltage was 1.02 and stop screw was way to far out not even hardly touching throttle ,so i raised the idle back up a tad reset the kam and tryed idle relearn its almost where it needs to be ,reason i say that is because when i put the car in drive the rpms raise little and they dont drop to far below my set idle but still is a tad outta wack, before hand the rpms would go way up to like 1100 rpms when put in drive then dip way below my set idle rpm's then back up to idle but so close to stalling
Last edit: 8 years 5 months ago by tadpole19.

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8 years 5 months ago #8501 by tadpole19
Replied by tadpole19 on topic tps voltage
well today i got in there car drove to local car wash ,washed the car , then drove about 3 miles and noticed car was skipping kinda like a 02 was going bad , went little father and noticed smoke comeing from hood area pulled over poped the hood, didnt notice anything so i let it set for few minutes, then went about 100 yds on it and smoke was pouring outta hood pulled over and poped hood again and 2nd coil from front on passengers side was smokeing had melted, dunno what caused that at all ! left it at local shop to be looked at, Also car was running half way desent at the time before this happened today other than it did have a slight miss

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  • Noah
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8 years 5 months ago #8531 by Noah
Replied by Noah on topic tps voltage
Sometimes a little water will expose a failing coil ;)
That sounds like a pretty severe failure though, not something I would expect from driving through a carwash.
Most of the melted coils I've seen were due to a short to ground on the control side.

"Ground cannot be checked with a 10mm socket"

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