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i experienced this about a yr ago and it could be a vacuum leak,air,idle control which runs about 100 bucks. best way to tell is take it to an automotive store or mechanic and have them run a diagnostics test. auto part stores do it for free but give a list of things it could be as to where a mechanic with the correct tools can tell you exactly what it is, just costs a little money. Also could be mass air flow sensor(MAF) which also runs about 100 bucks.
What else can I help you with?
Where is the idle air control valve in 2002 Pontiac Bonneville?
The idle air control valve on a 2002 Pontiac Bonneville is located on the intake manifold. This valve allows direct adjustment to the engines idle system.
Where is the idle control valve located on a 1995 pontiac bonneville?
to the right
What does a bad IAC cause?
the engine to stall and surge at idle
Why does your Zx2 surge at idle and in gear?
auto or stick shift
What causes my 1996 Bonneville to idle for 5 seconds and then die out?
c.s. magnet
How do you turn up the idle in a 1979 Pontiac Bonneville?
There is an idle adjustment at the carb. Look where the accelerator pulls the butterfly stop and you will see an adjustment screw.
What is causes an idle surge on a 93 Dodge Colt when it is warmed up?
Probaby a sensor.
What causes an 88 Toyota pickup to surge when idling?
The Idle Speed misadjustment, Timeing misadjustment, or bad throttle position sensor. Search one of the 4WD forums like IH8MUD.com or Pirate4x4 for idle surge. check the coolant level.
Why does your 1998 Hyundai accent surge at idle?
I had the same problem and it turned out to be the fuel purge censor
What would cause a 2000 Toyota Tacoma to surge at idle and while driving?
maybe the clutch
What would cause power surge in a 91 ford escort?
A power surge under a load is probably the transmission slipping. If its a manual transmission the pressure plate is slipping on the disc. If it is an automatic most likely it is a worn clutch pack slipping. If it surges at idle with the tranny in park the surge is usually a defective IAC (Idle Air Control) valve.
What is the black knob under the left carb on a 2005 Triumph Bonneville Motorcycle do. How does it work and how do you adjust it?
That is the idle adjustment. Turn it clockwise to increase the idle speed, counter-clockwise to lower the idle speed. You should not adjust the idle until your engine is fully warmed up, about 5 minutes of running. Adjust the idle speed to just over 1,000 RPM with the clutch in and the transmission in 1st gear. This is the most load your Bonneville will have at idle speed. You may need a bit of assistance for this, take care to hold the clutch in tightly if you lean over to adjust the idle by yourself.
