[97Formula]

Originally Posted by 97Formula

Just had it out tonight. I punched the gas at around 40-45MPH, and when it kicked into 2nd, I think I heard some ticking while under hard acceleration for a second (this was in the 3500-4500 RPM range). But when I slowed down to idle, the car wasn't really ticking at all.

EDIT -- I am now thinking that it was due to being close to a guardrail on a ramp (causing a "reverberating" effect). Tried a few times just now on different roads and was not able to reproduce the "ticking" sound I heard before on harder acceleration.

Quick update to this particular post -- I am now worried that it was detonation I heard for that little bit! Reason I was thinking is I had my car at the dealer replacing the fuel pump since I was still trying to solve the "slow prime" issue and occasional slightly harder cold starts. They tested fuel pressure, which was 45PSI with key on engine off, and 35PSI when running. Was told that GM specs called for 55-60PSI, and after the new pump it showed 58PSI (and the car accelerated a bit stronger and smoother, so I guess I was gradually losing power along the way as the fuel pump started to go).

How would I know if I damaged the engine (since I did not know the fuel pump was really on its way out but still did WOT runs here and there)? I am perplexed that I did not get a SES light or even a trouble code all this time...