Is 200 Misfire Update

[Ryan2311]

So I have changed the plugs and coil packs its still showing a misfire on cylinders 123 any more ideas I'm lost now is there possibly separate ecu,s. Its ok for the first half an hour driving then the misfire starts please please help lol

[wtf is200]

Hi,sounds strange..i would do compression test.check body earths.check ecu connector and its earth points.maybe do headgasket test.check injector connections wiring. For damage.once i had a rat under bonnet and had eaten cable and caused mis fire faults.theres so many things to check.could even be an air leak somewhere.good luck with that one.

[Ryan2311]

Cheers for that will get it in the garage again this week it's driving me mad just weird how its only 1 2 3 cylinders after about half an hour driving

[clifton 94]

hi could be the cat breaking up in the front manifold

[Ryan2311]

While its on the machine it's also saying lean bank does this mean anything

[sjrainsford]

As it's easy enough to do, i'd be tempted to swap your O2 sensors around to see if the fault moves to the other bank.

Just a thought, as they can cause all sorts of problems if not behaving correctly. Plus they aren't relied on during the warm up cycle which may explain your symptoms. Don't forget to inspect the wiring too.