My 1994 olds cut supreme 3.4 engine
Dear BL: this car runs very good, except when at stop sign,
or parked in idle, will surge, idle rough, then die, but will start
right up any ideas
Check engine light, codes? If not,
sounds like possibly a vacuum leak or the Idle Air Control valve is full of carbon.
A common place for a vacuum leak is the main vacuum-T on the top of the intake near
the valve body.
Also vacuum leaks can occur at the EGR mounting or the adapter under the EGR valve.
Try removing the IAC valve and clean it.
If the 3.4l dual overhead cam engine (position 8 of vin=X) then a VERY common area of
vacuum leak is the lower intake manifold gaskets leaking. Another condition is a very
high idle when cold.
Back
Dear BL: this car runs very good, except when at stop sign,
or parked in idle, will surge, idle rough, then die, but will start
right up any ideas
Check engine light, codes? If not,
sounds like possibly a vacuum leak or the Idle Air Control valve is full of carbon.
A common place for a vacuum leak is the main vacuum-T on the top of the intake near
the valve body.
Also vacuum leaks can occur at the EGR mounting or the adapter under the EGR valve.
Try removing the IAC valve and clean it.
If the 3.4l dual overhead cam engine (position 8 of vin=X) then a VERY common area of
vacuum leak is the lower intake manifold gaskets leaking. Another condition is a very
high idle when cold.
Back
1- Vacuum T
2- IAC valve
2- IAC valve
Other related questions
Where is the idle control valve located
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