DomsE36Garage Posted June 9, 2020 Report Share Posted June 9, 2020 Hi Guys, I'm running the G4+ pnp for the M50 vanos motor. I was out at the track yesterday and the car was misfiring on Cylinder 1 each session which I identified after session 2. A bit of background is the last time I was out racing before Covid, my high mount turbo setup blew out the downpipe gasket and I had a small fire right next to cylinder 1 and coilpack 1. Once the downpipe blew out, the car sort of went into limp mode and I limped it back to the pits and put out the fire. I've since fixed all that and the car sounded like it was running fine, however out on the track yesterday, you could hear it clearly at full noise brumming away on 5 out of 6 cylinders. I tried multiple tests (swapping known good coil for the potentially bad coil, also the wiring loom to coil 1 was pretty toasted so I snipped out the bad wires and did some trackside rewiring with no luck). So I'm pretty sure the coil is OK as it ran fine on another cylinder, and I'm pretty sure the sparkplug in Cyl1 is ok because it also worked fine in another cylinder, so I'm trying to work out a way to troubleshoot this. Q1. A mate recommended I set a 'logged channel' to see the voltage output, or at least some output recorded by the ecu each time the coil fires to see what is going on....is this possible to do and if so, how do I do it? Q2. Also, he suggest I try to get the ecu to test the coils by firing them on command so I can test for spark....is this also possible and how do I do it? I also plan on doing a compression test and depending on the spark situation, i'll check out the injector on Cylinder 1 too....I can't think what else may be the issue but I have a very strong hunch that whatever it is was caused by the fire in the engine bay. Here are some pictures of what's going on there too (all the white stuff is fire extinguisher residue from months ago), hope you can help Cheers, Dom Quote Link to comment Share on other sites More sharing options...
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