Why am I losing power after changing the spark plugs?

Having changed my spark plugs and leads my car loses power after about 10 minutes of driving. What could be the problem?

Jason Valentin (Sprighill)

Aug 2011 Filed under: fault

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Expert answer

Hi Jason,

We've come across these symptoms before and they usually mean a camshaft or crankshaft sensor is faulty. The issue is that they work fine when cold, but when they warm up the fault creeps in. Bring your car to a garage when warm and get them to put it on a diagnostics machine to confirm.

Hope that helps.

Shane O' Donoghue - Complete Car Adviser
@Shane_O_D