Please help: G35 p0300 problem
#16
I haven't been pleased with either of the two dealers I have been to so I'm with you on that boat. I would say bring the car back in and have them diagnose it again. If they charge you for the diagnosis, that's B/S considering they already diagnosed it and were wrong the first time. The least they can do at this point is diagnose it again for free. See what that say. Do the basics by checking the spark plug first, though.
#18
#20
Would cause a misfire on more than just cylinder 6, and timing is all computer controlled on the G anyway. You really can't throw off timing unless your timing chain is off by a tooth in which case your car would barely run, if at all. At least as far as I know. I would say to look at the wires but the car was running with the new stuff and then messed up again. The only thing I can think of that could cause that kind if problem is if your new plug is already fouled. Again, if there was oil in the tube that fouled your previous plug, it could theoretically foul this one.
Not much else I can recommend until you pull that plug. Seems to be the most likely problem.
Not much else I can recommend until you pull that plug. Seems to be the most likely problem.
#21
#22
#23
#24
I appreciate the kind words. We're all here to help. Diagnosing and attempting to fix your issue is a way for both of us to learn more as well.
With that said, to diagnose your injectors the only thing you can do is pull off your upper and lower plenum and manifold until you get to the fuel rail and injectors. With that off, have someone get in the car and turn the key to the "ON" position. The fuel pump should prime the fuel system. If you see any spray coming from any of the injectors, you'll need to replace that injector. Unless someone else has another way to test.
With that said, to diagnose your injectors the only thing you can do is pull off your upper and lower plenum and manifold until you get to the fuel rail and injectors. With that off, have someone get in the car and turn the key to the "ON" position. The fuel pump should prime the fuel system. If you see any spray coming from any of the injectors, you'll need to replace that injector. Unless someone else has another way to test.
Last edited by Bauer418; 04-26-2010 at 01:00 AM.
The following users liked this post:
mpugeda (01-15-2013)
#25
the dealer is saying they want to change the intake gaskets where the intake goes to the head(no charge) bc they think a possible leak.....doubt it......but i will tell them to check this while theyre down there nhopefully they listen and i dont have to do this myself like everything else