Discussion
I think that one cylinder may be very low on power and I have a bit of a mis-fire too. In the past I would have run the engine and taken the HT leads off in turn to find one which didn't have much effect. Is it safe to do this with the inputleads to the individual local coils on each plug?
GreenV8S said:
Deliberately causing a misfire by pulling leads off may make the situation worse. Better to test the exhaust manifold temperatures close to the head. A plastic cable tie held against the exhaust for a few seconds will quickly melt if that cylinder is firing.
Ingenious! I like that and will give it a try when I get to work tomorrow. Thanks!
ELAN+2 said:
if its a coil pack problem, you will have 2 cylinders down, not 1, more likely to be a problem with the valves/plug/plug lead/injector/rings etc on the dodgy pot. Infrared temp gauge is good for looking for miss fires (cooler exhaust runner).
good luck
(dont like the idea of melting cable ties on exhaust pipes though!
Why would it affect 2 cylinders? There's a seperate coil for each plug. Sorry, I'm still used to one coil and a distributor!good luck
(dont like the idea of melting cable ties on exhaust pipes though!
BB-Q said:
When I have this problem at work (usually with Renaults. Coil On Plug and yet still wired as wasted spark- bleedin' Frogs) I just unplug each injector in turn. You only need to do this for a split second to find the cylinder. Considering you already have this misfire I'm surprised your MIL light isn't on already. What car are we talking about?
Sorry, just dawned on me that I hadn't mentioned the car!It's an MGZT-T 260.
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