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MG MGF Technical - Hesitation at low revs

I have just recently purchased 97 mgf which i love. Unfortunately only had car 2 weeks and head gasket went so had that done and everything fine. However in last couple of day I have noticed after engine gets hot i am getting intermittent hesitation or 'burping' which seems to occur at 1.5 - 2.5 revs. has anyone out there got any ideas as ive already spent lot of money on head gasket and cam belt and cant afford another big bill! HELP!
M Clark

Hi Maria,

Firstly, sorry to hear of your early HGF - even though it's a common problem you've certainly been unlucky to suffer so soon.

It sounds most likely that your rotor arm and/or distribution cap needs replacing (you 97 car is probably still using the factory-fitted part, which has done quite well!) - luckily these are cheap and easy to change. I'm sure one of the more seasoned members of the BBS will be able to give you a little more help (such as Rob, Will or Dieter).

Could also be the throttle sensor or throttle body itself, but i'd certainly look at the rotor arm first.

Mike Chase

thanks mike

That gives me something to go on. The car is high mileage having done 94000 but i do love it and actually prefer my mgf to the new tf and im hoping to do lots more miles in the sunshine!!

maria clark

I'm with you Mike - Maria, if your car is an MPi (rather than the VVC) then I suspect that the rotor arm/ distributor arm is due for replacement (also recommend taking the opportunity to replace the HT cables for magnecore items - I got mine from B&G some years back and they've been absolutely reliable).

DIY the dizzy cap and rotor is pretty straightforward - see for more detail :o)
Rob Bell


Had the exact same problem a few months ago and agree with Mike in replacing the dizzy cap and rotor arm. Thsi immediately cure the problem.

Replacing the parts is a relatively cheap and easy DIY job

Dave Allen

This thread was discussed on 16/06/2005

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