misfiring PLEASE HELP

[matt 1.2 16v]

Can anyone help.

My car is misfiring when sitting in traffic/statianary.Ive got a k-tec induction kit on it and also a devil back box,ive ruled out the back box after removing it nxt stage to remove the induction kit.was just wondering if anyone can save me sometime and maybe knows why this is happening?

thanks

 

[BenR]

describe the symptoms first please.

WHat do you mean by misfiring?

are you actually skipping a cylinder?

 

[matt 1.2 16v]

Once the cars has warmed and at a standstill it feels as if somones jst hit the back of the car.Also if you watch the engine the hole engine rocks.Also if u listen at the backend the only way to describe it is like a v loud spitting noise.any ideas?

 

[BenR]

hmmm...

try taking off one plug lead at a time to find the culprit cylinder.

 

[matt 1.2 16v]

cheers ill give that a try fingers crossed.What mainly can cause this problem or could it be a variety of things?

 

[Rajk]

sounds silly but all the plug leads on properly, might be a dodgey set of leads, my old BM had a very bad habit of making one of the leads disconnect itself and it was like driving a tractor. The BM leads go in side ways and it used to just fall off due to vibration.

 

[BenR]

its either Fueling or spark........eliminate one an you know what to check on.