When idling my 92 will dip to 300-400 rpm then back up

[Dannnnn_The_Man]

I recently was passed down a 92 gsr that has a problem when idling. When i idle, the rpm's will dip down to 400ish and the car begins to shake a little bit. Today it got so low that I thought i was going to stall in traffic. Has this happened to anyone else and or is this a known solution? I saw a similar thread but there was no sure answer.

 

[DA9teg1]

clean the idle air control valve if that dont fix it try adjusting the fast idle air valve that one is guna be a bitch to get to tho. but in that fails go to junk yard and get like 2-3 idle air control valves and try them. happened with my 90 DA still does it but mine is idling at 2-2500 depending on how hot it is that day. i cleaned mine to get it that way before it would rise to 3 gran and drop to 850 then back up again.

 

[TA4S]

Either the IACV (as mentioned) or you have a vacuum leak.

To test the latter- car running, spray carb cleaner around the intake manifold and brake booster. If it stumbles then check/replace the hose or gasket.



TA4S

 

[djzachtyler]

check vacuum lines that connect to the MAP Sensor assembly for any cracks & clean out your IACV with a shot of carb cleaner.

 

[integragsr2002]

I got the same prob but then after a min it stalls PM me Please with answers.