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Hi everyone. Maybe someone know good diagnostic service for my vg30dett? Do not want go to the service who don't know nothing about this engines.

Basically problem is with first cylinder. Probably it misfire. I checked all coil packs, they working, new spak plugs, yesterday I check spark plugs again all looks the same. But when I put them back from exhaust come out white smoke(maybe it was after rain, because I didn't drive for 1 week)

When I'm disconnect plug from coil pack, nothing changing.. Other cylinders fine. Compression also low 128psi in all cylinder same compression. So I think maybe problem with ecu.. And maybe there is a point to clean injectors.. Is there any ideas?

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Sounds like an injector might have failed. Clean the plug and test the impedance. If the impedance is out, then you need to replace the injector. Fairly common now due to the age of the cars.

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