1993 jeep grand cherikee the car will idle suddenly it will rev up the idle and run fast then it will decrease the idle and almost to a halt then rev up again and keep repeating the process.

SOURCE: HIGH IDLE

check for deposits in the airhorn at the breather end

Dar

• 2007 Answers
• Posted on May 15, 2009

SOURCE: idle to fast when i start up the car this a 2001 grand am se

Faulty idle air control valve.

SOURCE: 300zx erratic idle 1993 n/a

Your Idle Air Control Valve is at fault. These never set a code when they fail and they always fail.

Check this item out on eBay.

http://cgi.ebay.com/ebaymotors/nissan-300zx-OEM-idle-air-control-valve-IACV_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQhashZitem5189d6b9f7QQitemZ350204901879QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

They aren't usually this expensive so search the net and you should find a much better deal.

You shouldn't need to worry about the gasket when replacing this. They usually don't tear and stick to the manifold. If it does tear though you should replace it

Marvin

• 85242 Answers
• Posted on Jul 01, 2009

SOURCE: 1993 ford ranger won't Idle right

I am a Ford dealer Tech and this is what cures this issue most of the time.

, 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: 1995 Jeep grand cherokee is missing while running.

I have the same problem on my 95 grand cherokee laredo. Sometimes it starts out fine and after about 10 miles it starts spitting and sputtering. Then after a while it seems to clean out and run fine again for a little while. Then other times it starts out spitting and sputtering at the begining. I changed the fuel filter and that was not it. It is a 4.0L 6cyc. Any Ideas?

Thanks,
Broken Arrow, OK