Hi Guys,

My 1.7 has a missfire at idle but drives okay otherwise?
Possible problems?

Should have a video up tomorrow


Thanks

Id start by cleaning the MAF and a set of new plugs, while your there check the rocker cover gasket isnt leaking

Cheers, sounds more internal... But will do that, I'll post a video in a while of it running.

that would definatley be my first port of call, then if it is still miss firing you have dealt with the most common probs first

Just started it for the first time in a while there, and it's not as bad as I thought.

I'll put up the video in a min.... It clears after 3k revs.

yeah i think what ive suggested should sort it mate

Right checked plugs and MAF..... Still the same...


Anything else to try? I'v another engine hear so can swap over bits

what about the coil pack? take the one from your other engine and swap it over.

Already tryed a coil pack... But I took it off my 1.4 Puma, was still the same.


It has to be simple as the car still drives perfect

Have you got a maf to try? I know you've cleaned it, but got to be worth a switch if donor is available. They are very common to fail. On the hot-wire.

Matt

I'd guess the Idle Control Valve.



It fits diamond kinda shape where those two little holes are on the inlet.

i had one that did the same, tried loads of things, ended up puttin new leads and plugs on and it was sorted

that's usually the problem when they do this.

Have swapped in another MAF.
Have swapped in another Idle Control Valve.

Will just try leads and plugs (I think I already tried it, but sure what harm)

Thanks for the help guys.