Quote:
Originally Posted by rjahl
Just a question, do you need to lock the VVL open to get a reliable compression check?
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I dont think so, because the compression occurs when the valves are closed -> no lift. The tool (pressure gauge) will hold the maximum pressure when you crank for 4 cycles and should be the same pressure for all cylinders
I think you only need to disconnect fuel pump (fuse/relay) and disconnect coil packs, remove the plug and put the tool and cranck for each cylinder
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E90 328i n52 auto, 3 stage IM, k&n drop in, charcoal delete, silicone boot, ebay headers, secondary cats delete, bpc tune. MILVs (soon), MT swap (planning)