RobRomero

iTrader: (1)

I have a 2002 LS1 that sounded/ran great when I bought it. Last summer it had about 5 passes down the track so I could get an idea of where my times are and what my mod considerations should be. Over the last few months I have noticed this sound that always happens at WOT, but on occasion does happen during normal driving as well, just not as pronounced. To explain the sound I guess it would have to be like the chirping sound of a whistle, but not as high pitched. I have installed new exhaust manifold gasket, but still getting the same sound. I'm looking for constructive ideas on what the problem could be. Please help.

Darkman

iTrader: (2)

Things that might chirp at WOT but not at other times would include belts and power steering pumps.

Bo's 98 TA

iTrader: (4)

Does it affect the drivability of the car?

RobRomero

iTrader: (1)

Doesn't effect drivability at all. I'm just worried maybe it's problems with the timing chain, valves, lifters, or something else I'm not thinking of. I haven't been able to isolate the sound and it only happens while in gear. I've done revs in park and nothing happens.
I did also notice that after I changed to a larger MAF the car started shifting earlier (not saying the MAF was the problem). I went back to OEM size, but still having the same problem. This may be contributing to the "chirping" b/c it seems to chirp almost like it's out of time. It doesn't seem like the car is downshifting when it should and it up-shifts too early.

Any thoughts?

RobRomero

iTrader: (1)

I know what you mean. I'm very familiar with the "belt squeaks" but this sound is different.

RobRomero

iTrader: (1)

Some suggestions please?

rich5368

iTrader: (2)

I had a 4 banger that chirped like a cricket at 4600 rpm at WOT. I found the issue was a leak in one of my intake couplers. Probably not your issue but an idea.