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MG MGF Technical - Dead spot on acceleration/de-acceleration

I have an awful dead spot when attempting to accelerate, this also occurs when keeping a constant speed, the engine seems to die the pick up, which in certain circumstances leads to the kangaroo effect. This only occurs when the engine has reached normal temperature. To sum up, accelerate and there is an initial dead spot then ok while under load, release throttle and kangaroo takes over. Please help. PS idle speed varies enormously depending on what mood she is in.
S Everett

Well documented in the archives, and something I'm suffering from slightly too... Often it's a poor connection on the idle control valve that leads to the erratic idle and lumpy overrun. The flat spot points slightly towards the ECU temperature sender being suspect too, again I'd start by cleaning up all the connectors with electrical contact spray.
Mike Hankin

Thanks Mike, bought some contact cleaner this morning spayed the contacts of both ICV and temp sensor. Went for a run and the problem seems to have been cleared.
S Everett

Simon, if your MG is a pre-2001 MGF, then I'd suspect the dizzy cap and rotor... easy replacement too: http://www.mgf.ultimatemg.com/group2/common_problems/distributor/stuttering.htm

HTH
Rob Bell

hi all, im suffering from same problem could you please let me know where to locate the icv and temp sensor. thanks
s hardy

where the icv valve and the temp sensor then
darren
Darren Jeffery

could you point me in the the direction of the icv valve and sensor please ??
Darren Jeffery

Temperature sensor is on the engine coolant outlet stub on the front left corner of the engine: http://mgf.ultimatemg.com/group2/common_problems/hgf_pages/related_problems_overheating.htm

The IACV is usually found on the inlet manifold - on the front left corner of the VVC plenum and similarly on the plastic plenum of the MPi... don't have a picture to hand, sorry, but you should be able to find it easily enough - follow the rubber hoses to the throttle body, and you'll find it! :o)
Rob Bell

This thread was discussed between 08/04/2007 and 06/05/2007

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