My Park Avenue has a never ending high idle issue! - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-30-2006, 01:01 AM   #11
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Quote:
Originally Posted by Buickman104
Yeah sorry I forgot to metion that we did scan the carputer. We did not get any kind of codes. The only thing that I though was out of place was that. The computer said that the TPS was open at 6% throttle.
OK did you guys calibrate that TPS when you installed it? the 92'* required calibration iirc..

You want that to be 0% at idle

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Old 03-30-2006, 01:02 AM   #12
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Quote:
Originally Posted by J Wikoff
Ah, so your TPS is adjusted wrong or the throttle is indeed a little open.
We asked a 3800 mechanic about it and he said that that was normal to see the throttle like that since they auto zero in the calibrate themselves through the PCM. That is what he said
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Old 03-30-2006, 01:03 AM   #13
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Quote:
Originally Posted by Buickman104
Quote:
Originally Posted by J Wikoff
Ah, so your TPS is adjusted wrong or the throttle is indeed a little open.
We asked a 3800 mechanic about it and he said that that was normal to see the throttle like that since they auto zero in the calibrate themselves through the PCM. That is what he said
In later years they are not adjustable and there is no need to claibrate, I believe that started with the 93 3800... You guys need to go back and move that sensor till the scantool says 0% and then tighten the screws and go from there.. The earlier 3800'* are very touchy about that TPS sensor..

Now on the other hand the PCM will learn the IAC when the correct perameters are met

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Old 03-30-2006, 01:04 AM   #14
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Agreed.
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Old 03-30-2006, 01:07 AM   #15
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Well mine is an LN3 but it uses mostly the same parts...

my revving problem turned out to be a malfunctioning TPS, so make absolutely sure that TPS is working, and make sure it is set correctly. Otherwise i would say it is a vacuum leak, but i am sorta partial to the whole TPS thing...

I am not really sure about those engines, but is the TPS the adjustable kind with the cresent shaped holes or the non-adjustable kind? Make sure that the voltage is rising with the movement of the TPS blade, i found out mine was sending a high signal to the computer and the voltage was not rising with the movement of the blade, guess the brushes were bad or SOMETHING....
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Old 03-30-2006, 01:11 AM   #16
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Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by Buickman104
Quote:
Originally Posted by J Wikoff
Ah, so your TPS is adjusted wrong or the throttle is indeed a little open.
We asked a 3800 mechanic about it and he said that that was normal to see the throttle like that since they auto zero in the calibrate themselves through the PCM. That is what he said
In later years they are not adjustable and there is no need to claibrate, I believe that started with the 93 3800... You guys need to go back and move that sensor till the scantool says 0% and then tighten the screws and go from there
Okay I will give that a shot. The strange thing with the original TPS is that the car idled fine an then when the problem started happening the car idled at 2500 rpms to start. Then when I put in the new TPS the car started at 1700 rpms, but the quickly rose to 2500 as the car warmed up. The car also has a coolant related problem where I get the low coolant light on the car, when the coolant is at a sufficient level and the temperature readings are all normal, but when I turn the car off the coolant coming back to to resevior is boiling and making boiling sounds and steaming.
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Old 03-30-2006, 01:18 AM   #17
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Once you do that let us know the results...

If its still a problem we'll see what we can come up with...

Also do you have access to the scantool at any time?

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Old 03-30-2006, 01:21 AM   #18
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This week we should have access to one, but we are planning to get our own scan tool since Oldsman is going to do a pulley drop soon. For now we don't really have one at any time disposal, but we will soon.
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Old 03-30-2006, 01:27 AM   #19
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See this is what I get for selling you the car. :P
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Old 03-30-2006, 02:17 AM   #20
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Quote:
Originally Posted by Buickman104
Okay I will give that a shot. The strange thing with the original TPS is that the car idled fine an then when the problem started happening the car idled at 2500 rpms to start. Then when I put in the new TPS the car started at 1700 rpms, but the quickly rose to 2500 as the car warmed up.
Mine did the same thing, even though mine was defective, it sounds like a maladjusted TPS, be VERY precise when adjusting it, just as mentioned above, VERY touchy!!

Also, about that whole boiling thing, mine does that too...but i would not know about sensors as LEs don't have crap to tell you anything....just might be as simple as a bad coolant sensor.
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