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MG MGF Technical - Engine running rough

I have a '97' MGF VVC, head gasket replaced in Jan, starter motor replaced in Feb. I have noticed just recently especially this morn, that may car has been running a little rough, especially this morn when it took 10 mins to start. Over the past few days it seems to run rough by juddering a lot as i change gears, i spose the simplest way of putting it, is as thouhgh its got kangaroo juice in it.....When I got to my destination today, I looked at the engine and noticed the pipe to the air filter box (note, I am by no means an expert in this area) had come loose, could this be the prob????

Anyone with any ideas would greatly be appreciated....


Any one gonna help??

Hi Andy,

Sounds like it needs a service, particularly check ignition system, plugs & leads etc.

I also always change oil more regularly than the stated 12K interval and use the best parts I can get my hands on (platinum plugs etc). It will pay off in the long run.

Keep an eye on the temp gauge & water levels also, rough running can precede an HGF.

Cheers, Russ.
Russ D Mellor

Another thought is an inlet manifold leak.

How is the car idling?

What makes the problem worse?

Any untoward noises?

A classic problem with the VVC is the cam bolt working its way loose - might be worth removing the cam belt cover and checking the torque of the retaining bolts...
Rob Bell

My 2000 vvc had a similar problem whwn the map sensor failed. It was particularly bad on cold mornings and gave the 'kangaroo' effect. It was found after a session on Test Book and cost 120 for a new sensor.
Stuart Elliot

This thread was discussed on 08/03/2006

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