Check for loose Plug Wires, and such. If over 100K Miles, do a Tune-up. It's cheap. You sound like a Plug Wire is grounding out. If it has Coil on Plug, there are Boots, under the Coil Pack. I would start with a Tune-up. Also, use a good Injection Cleaner, from the Parts Store.
SOURCE: rough idle and lopes
Those 4.3L's have a Central Port Fuel Injection system with one injector in the middle of the intake under the plenum, they are good for either the fuel pressure regulator or the plastic lines (that are inside the intake that feed the injector) leaking inside and flooding the intake with fuel. The best way to tell is to take the plenum off and thurn the key to prime the fuel pump and watch for leaks.
SOURCE: have a 96 camry 4
Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) 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: 2000 kia sportage ex, 4 cyl.
Yes there is a sensor that controls Fuel/air ratio.It's called a MAF (mass air flow sensor)
But I think you should have the EGR (Exhaust gas recirculation)valve checked
and The TPS (throttle position sensor)maybe dirty.
Although may things can cause this issue,I would look at the items above first.
Please rate this a blue fixya
SOURCE: 2001 Kia Sportage runs rough
Yes my frend open the bonnet and stand infront of the car, on the left hand side between the engine and the boddy there is a black round container with pipes going into it. next to the container there is a vacume switch, 99% of the time this pipes going into the switch is brohen or the pipe is leaking. Enjoy Willem SA
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