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MG MGF Technical - OVER FUELING

HGF IN OCTOBER. REPAIRED AND RETURNED, FOLLOWING WEEK WOULD NOT START STARTER MOTOR TRYING BUT JUST WONT FIRE. SOMETINES WILL START BUT NOT RELIABLE. BEEN IN GARAGE EVER SINCE CANT FIND FAULT CHECKED EVERYHTING. SEEMS TO BE OVER FUELING WHICH IS ECU CONTROLLED BUT ECU TESTED AND APPARENTLY NO FAULTS ANY IDEAS????
SIMON

Time to change garage.

Sorry, but I can't think of anything that would cause overfueling bad enough to prevent a start, and certainly nothing that would be effected by a HGF.
Will Munns

Have all sensors/etc been reconnected after the head came off for the HGF?

Bruce
Bruce Caldwell

Tried shouting at it?
Graham Martin

Hi Simon,

Worth pulling every single connector off and spraying with contact spray - sounds electrical to me. One poor connection can be enough to confuse the ECU. Also possible that the rebuild has compounded a broken wire problem somewhere, e.g. the throttle position sensor.

Good luck!
Mike Hankin

Cheers gents, i believe all re conected ok, it seems to start slighly more often if engine is hot. The only way I can get it too start if it doesnt is to tap the fuel shut off valve try starting which drains the fuel push the reset and then it starts staignt away, what can I do to sort??
simon

It could sound stupid, but try to start the engine after you have cleaned the spark plugs. After all those attempts it could well be that those plugs are rather dirty/wet.
Erik

Simon, what is the warm idle speed?
Rob Bell

That does sound like flooding, common causes of flooding are poor driving practice for instance blipping the throttle when turning off or running for very short peroids of time,
Also the Map sensor may give this on an early car it is a tube from the end of the manifold to the ECU, but I would think the car would be undrivable in these conditions.

Does the car run OK to drive once started?
Will Munns

This thread was discussed between 25/02/2006 and 27/02/2006

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