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Buick 1997 Park Ave bucks and stalls only in the summer

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Old May 29, 2021 | 12:20 AM
  #51  
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If it is not the ICM it could be the IAT, remove it and clean the pintle, then put it back....
My money is on that ir the ICM...
Old May 29, 2021 | 07:35 AM
  #52  
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Originally Posted by WilliamE
If it is not the ICM it could be the IAT, remove it and clean the pintle, then put it back....
My money is on that ir the ICM...
Did you mean to say IAC instead of IAT?
Old May 29, 2021 | 04:02 PM
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Originally Posted by Mad_Coachman
Did you mean to say IAC instead of IAT?
Yeah I did, thanks for catching that for me.

Old May 29, 2021 | 05:11 PM
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Thank you but I already cleaned and inspected the IAC and it seems good. Right now the car is running good but i will know better in a few weeks when the weather
gets hotter. That'* when i normally have my problems.
Old May 29, 2021 | 05:17 PM
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Ahh ok....
I have heard of some holding a hair dryer near the ICM, moving it back and forth for a bit to heat up the ICM to see if it will shut off...
Just don't keep it still and melt anything...
Or just be smart and patient and wait for the heat..
Old May 29, 2021 | 11:42 PM
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I think I'll just wait for the summer heat since that is when i have the problem. Right now the car runs great.
Old Jun 11, 2021 | 01:59 AM
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Ok, well today I finally got to test out the car since outdoor temp. was in the 80'*. All seems ok now no stalling nor bucking on hard acceleration. Engine temp.
reached 205 F and all was okay. Last thing I did was to remove and clean the EGR valve and sprayed the plunger on it. I hope that was the solution to
my problem. I will see what happens this summer as the temperatures get hotter.
Thank you everyone for your suggestions.
Old Jun 19, 2021 | 01:31 AM
  #58  
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HELP!!!!!!!......well today was 90 F and I tried the car out again. Engine temp went to 210 F and started bucking on acceleration. If I put it in P or N the engine idles great
and smooth but once I put it into gear it starts to buck also no check engine light but i get ding, ding, ding from some sort of alert.
I hope someone else has had this problem and solved it. Any help would be appreciated.
Old Jun 19, 2021 | 08:26 AM
  #59  
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I've just been though this in a major tune up on my PA.
The ding ding'* are probably indication of a misfire situation. Mine took a while to finally set a mis fire code.
Replace the fuel filter then....
Lets go back to talking about the fuel pressure test, get er done. Report the psi readings back here!
Compression test on each cylinder should get done as well.Note psi on each cylinder in firing order.
Spark plug wires you mentioned as ac delco how old are they?
I went with NGK silicone set. Car sure runs great now.
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Edit Add: Are you ever having to add coolant to the reservoir? I've had to do the upper & lower intake gaskets now twice on my car.

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Old Jun 19, 2021 | 11:12 AM
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I seen it suggested, but never seen you say you tried it...
Did you try unplugging the MAF sensor when it gets like this?



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