mjcmusic

I hear a rattling [clicking] sound upon hard acceleration. Could that be detonation? I hope not. I did not hear that sound with the stock ECU and first heard it when I took my test drive after chipping. Any ideas? Thank you

BlueMaxx

Let it sit like that for 2-5 minutes. This is a necessary step in installing the ECU with the new chip, and if you didn't do it before, do it now.

jon-jon

its "..I'm hearing a strange" not "strage".

heehehe. sorry just really picky. and being a jerk of course.

wmdunn

hearing a ping. My first action would be to check the quality of the fuel. I have about 20k on my 2000 with APR v3.0, and nary a noise of any kind except the spool up. I use mainly ARCO, which in CA is 92 octane. Good luck.

audiohs

My car made a similar noise too when I test drove it (bought car used last year and had Wett chip already). But the car lot most likely put 87 Octane gas in it and now I run Sunoco 94 without any problems. As wmdunn suggested below, check the grade of your gas.

How long does the sound last? If it's only for a brief second, the knock sensors are doing it's job adjusting the timing. Probably just some minor pinging. If it lasts longer, I'd be a little more concerned.

mjcmusic

I realized I had misspelled the word strange about 1.8 seconds after I posted it. Thanks for the friendly reminder. Ha, ha.

Žob

Fluttering could indicate a failed BPV. Pennies are bad gas

Gman01

APR SUCKS DUDE