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Discussion Starter · #1 ·
OK replaced the TPS car runs great no issues with IDLE in P or in D . BUT !!!!!! When I turn on the AC the IDLE Gets bad in P & really bad in D at a stop. Any ideas of what to do now ??? Some one sugessted to slot the holes on the TPS and adjust it that way ( because it is not adjustable ) but won't that raise my good idle without the AC on. I may just put back the old one & put back the .010 piece of metal on the throttle stop plate under the non adjustable idle screw because that worked before the new TPS was put in. OR if any one knows of a demolition derbie in my area car should last a while it only has 63K on it .
 

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The computer should automatically raise the idle to compensate for the load of the A/C. How low does the idle go?
 

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Phil1998 said:
OK replaced the TPS car runs great no issues with IDLE in P or in D . BUT !!!!!! When I turn on the AC the IDLE Gets bad in P & really bad in D at a stop. Any ideas of what to do now ??? Some one sugessted to slot the holes on the TPS and adjust it that way ( because it is not adjustable ) but won't that raise my good idle without the AC on. I may just put back the old one & put back the .010 piece of metal on the throttle stop plate under the non adjustable idle screw because that worked before the new TPS was put in. OR if any one knows of a demolition derbie in my area car should last a while it only has 63K on it .
Lookit Phil, I don't know why you're having a problem adjusting you TPS (Throttle Position Sensor)!!! I've got my Haynes Manual here in front of me, and it covers 1991-2000 Escorts and Tracers. On pages 4-15, and 4-16, it talks about removing and replacing the TPS on both the !.9 Litre engine, and the 2.0 Litre engine. According to this book, the TPS' on both engines ARE adjustable!!!!! Here's one of the things that it says about adjusting them---
"Turn the Throttle Position Sensor 1/4 turn clockwise from it's installed position, then slide it into position over the throttle shaft blade and rotate the Throttle Position Sensor counterclockwise only to align the scribe marks. NOW GET THIS---Rotating the Sensor clockwise may cause excessive idle speeds." So doesn't that PROVE that the TPS IS ADJUSTABLE????????????????
 

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it is NOT adjustable - the TPS HAS solid metal eyelets for the mounting screws. The only way to adjust it is to drill out/slot the eyelets.

 

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+1
 

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97DragScort said:
it is NOT adjustable - the TPS HAS solid metal eyelets for the mounting screws. The only way to adjust it is to drill out/slot the eyelets.

Well Mr. Dragscort, your picture seems to prove your point!!! So, what then is my idiotic Haynes Manual talking about??? Is it just plain wrong? Or am I interpreting it wrong?
Thanks!!
 

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Haynes is wrong about adjustment- the 1.8L and the early 1.9L were adjustable - the later models were not.

Haynes is speaking more in the way of installation than anything else -

I have my TPS (mind you, Im running a T-Bird TPS on the 3.8TB - same basic setup tho, eyelets and all) marked with a hash mark on the sensor houseing aswell as the TB - for ECU reset, I set it at .95ohms, after idle is learned, I set it to 1.2ohms and I have a good strong idle ~925rpm

also, IIRC, you dont neccasarily have to drill the eyelets out - they are pressed in... we drilled after the eyelets were out to increase the adjustment more
 

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97DragScort said:
Haynes is wrong about adjustment- the 1.8L and the early 1.9L were adjustable - the later models were not.

Haynes is speaking more in the way of installation than anything else -

I have my TPS (mind you, Im running a T-Bird TPS on the 3.8TB - same basic setup tho, eyelets and all) marked with a hash mark on the sensor houseing aswell as the TB - for ECU reset, I set it at .95ohms, after idle is learned, I set it to 1.2ohms and I have a good strong idle ~925rpm

also, IIRC, you dont neccasarily have to drill the eyelets out - they are pressed in... we drilled after the eyelets were out to increase the adjustment more
Thank you Dragscort! My bad!
buzzyj
 

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Discussion Starter · #9 ·
Thanks Guys TPS issue

The repair manual is correct on the install that is the way I installed it but it is non adjustable early models yes this one no unless I slot thoses holes. Now get this I have been driving around with the AC on & the Idle is getting better now when I stop while in drive the shaking is getting less and less. Could the computer have something to do with this possibly readjusting it self to the new TPS ???
 

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Did you notice a change in idle when you are in Drive or Park (without the AC on) right away or has it slowly been getting better?
 

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Discussion Starter · #11 ·
Bad IDLE

Idle Got better right away with no AC on.
But slowly getting better with AC on.
Why do you ASK ???
 

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Just replaced mine last nite and reset the ECU will I was at it. But, before I reset the ECU, I started it up and let it sit for a minute and didn't notice anything right away.... Not sure if there is a difference but mine is a 2001 as you said yours is a 98.
 

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Discussion Starter · #13 ·
TPS

I do not think there is that much diference between the cars. Mine run good then the idle gets rough then it run good again ???
 

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The replacement came new from Autozone. The only thing I can think of is that maybe 1 of the 2 screws isn't tight enough. The heads of the screws seemed pretty soft and got stripped a little. Trying not to damage it any further, I got it as tight as I could before it was totally stripped. Kind of a hard place to get to....
 

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hey my car is kind of doing the same thing. its a 97 auto and sometimes at idle it will just start to chug from 400-1000ish RPMs. drove with my buddys Ethos hooked up to it and nothing was out of the ordinary except the number 2 O2 sensor by like 5 pts. any ideas?
 

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97DragScort said:
I replaced mine with allen head screws - no problems since :D
That's not a bad idea. Might have to change them out if I can get the other ones out... Where did ya get the replacements?
 
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