Question about 2005 Kia Amanti
My guess would be injector control circuits failed. Or perhaps you got some bad gas which gummed up your injectors. If that is the case, the injectors cannot shut the fuel flow off, for the same reason you cannot completely closed a door if your foot is in the way. It is possible but unlikely, that a computer glitch got the engine computer out of kilter, which can often be corrected by disconnecting the battery for 15 minutes, then reconnecting it. In that case, the computer will go back to original settings programmed in a ROM (Read Only Memory). Good luck!
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Posted on Jan 02, 2017
Run a compression test. Sounds like a bad head gasket, letting coolant into the cylinder and causing misfire. I think you will find one (or two adjacent) cylinders have much lower compression than the others. There should not be more than 20% difference from highest to lowest.
Posted on Sep 05, 2010
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Sep 05, 2010 | 2005 Kia Amanti
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.
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