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I would need some help here.

Car: Clio 2, 2000, 1.2 58 Hp, gasoline, D7f, 8V, 90000 miles

The car has trouble starting when hot. It runs nicely and can drive it, until that happens: RPM go up in the middle of a drive to some mid level even if nothing is pressed, car looses power. If I try to accelerate rpm goes down and won't move even if I wait a minute. There isn't any shaking, it just doesn't have power. It won't shut down on it's own. After I turn it off and wait, start it again it works normally and I can drive. That happened 2 times recently.

Is that a misfire or not? What could it be? I don't know, I guess in case of misfire car would still run of few cylinders and have some power back after few seconds?

In the last 7000 miles I changed: ignition coil, oxygen sensor, spark plug wires, spark plugs, head gasket, oil, fuel pump, crankshaft position sensor, air filter. I recently removed, cleaned the throttle body completely with its sensors and tightened it enough to prevent vacuum leaks. That issue still happened. Rpm are a little too high at idle, not completely stable. It smells a bit of sulphur, but not a lot.

Alex J.
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1 Answers1

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You're not describing a misfire.

The weird driving, power and RPM symptoms that you mentioned can all be explained by a fault in the accelerator pedal position sensor or the wiring and connectors between the ECM and the accelerator pedal. A fault here should be accompanied by multiple fault codes, which you have not mentioned.

You should scan this car for codes before you do anything else. You have not said why you have replaced a multitude of parts or whether those part changes were an attempt to repair the current problem or to fix unrelated problems.

I'm not suggesting you run out and buy a new accelerator pedal assembly. Yours may be perfectly fine but the cable or connectors could have a fault. Methodical diagnosis is the only way to know for sure.

MTA
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