Engine ping under light throttle

nis350 · 02-22-2017, 05:58 PM

I don't have a scanner. It is my wife's DD and the ping started around 60k miles under condition described on the first post. It occurs intermittently and can't be reproduce at will (unfortunately).

Carbon build up was my first guess. We ran through many different kind of fuel cleaners but didn't really help much. However, it may not be the cause since it doesn't occur under load.

As for exhaust leaks, should be noticeable at idle during the cold start? Engine idles smooth and quiet under all condition.

Quote:

Originally Posted by Jhill

First question. how many miles on the car (carbon build up)? Do you have access to a scanner with data access to see knock counts? Are you sure it is knock and not something else like an exhaust leak, not common on this car from what I've read but have had some pin hole exhaust leak that can sound like pinging under part throttle load.

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