"Pinging sound"

[infiniti05]

my g35 still has a pinging sound coming from the undercarriage of the car. i have always used octane 93 and switched to different gas stations and took it to the dealer n they couldnt find the problem.....is this pinging sound normal???

[szh]

No, it is not normal to hear pinging. Is it rapid engine pinging when you accelerate? or do you mean something else (like metal expansion and contraction sounds)?

If engine pinging:

1. You may have some bad gas in there. Might be worth trying some ISOHEET to remove water (that is a SWAG) ... make sure it is ISOHEET, not plain HEET.

2. Or carbon build-up. Some WOT's may clear it out, or you may need to use a can of BG-44K in the fuel tank and see if that helps.

3. If that does not help, then a power injector rail flush may work

These are guesses ... good luck and let us know if you figure out what it is.

Z