93 GMC yukon 5.7 L. Replaced head gasket. now its starts and can get it idling. But hit accelorater and it bogs down or sometimes runs high RPMS Or runs to rich. HELP

SOURCE: 2002 Saturn idling high then drops to normal

Your 2002 Saturn car has an electrical recall .I think its the ignition modual.Owners should contact saturn @ 1-800-553-6000, Prompt 3
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SOURCE: 1990 Toyota Celica GTS. Idle races too high

sound very much like a vacuum leak.... also maybe your timing is off? possibly advanced? try retarding it with the distributor if thats the case...

Marvin

• 85242 Answers
• Posted on Apr 07, 2009

SOURCE: 1993 olds cutlass supreme 3.1 multi port loading up at idle

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

SOURCE: '93 D21 ka2.4. miss fire,surge, and runs rich

sounds like you have a very dirty mass air flow meter. invest in a new one and be sure to clean the throttle body with an appropriate cleaner and tooth brush.

SOURCE: 2002 gmc yukon denali rough idle, low idle about 500 rpms

Clean the trottle body & Check spark plugs.