V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

3.1 v6 idling issue 500 to 1500 rpm

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Old Mar 23, 2020 | 12:47 PM
  #1  
luca's Avatar
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Joined: Nov 2016
Posts: 90
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Car: Firebird
Engine: 3.1
Transmission: 700r4 /borg warner t5
3.1 v6 idling issue 500 to 1500 rpm

i got some strange idling issues on my 1990 3.1 v6 the car got 124k miles on it and runs smooth .
when i push the clutch and the car is rolling the idle changes from 500 to 1500 rpm bounces up and down same when i roll to a traffic light , however after a few seconds its at its normal idle
it is so annoying
when i start the car when the engine is cold or hot it idles fine
the parts i changed the fuel injectors , fuel filter all new sensors full tune up ... but it stays the same
i read many threads on this forum but cant find an answer to this problem
would be great if anyone can help me
thanks
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Old Mar 23, 2020 | 01:33 PM
  #2  
Drew's Avatar
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From: Salina, KS
Re: 3.1 v6 idling issue 500 to 1500 rpm

When was the last time you cleaned the IAC pintle and passages in the throttlebody?
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