high pitch noise at idle

[Bluevitz-rs]

Ok, I have another idea... I too ran a straight pipe axle back for a while and tho it was cool and loud, It also set missfire code because the joint was loose, at idle. Make sure all the joints in the exhaust system are tight. It was doing the exact same thing at idle, minus the noise. The revs were dropping because it was pulling timing back.

[mokmok]

Originally Posted by Bluevitz-rs

Ok, I have another idea... I too ran a straight pipe axle back for a while and tho it was cool and loud, It also set missfire code because the joint was loose, at idle. Make sure all the joints in the exhaust system are tight. It was doing the exact same thing at idle, minus the noise. The revs were dropping because it was pulling timing back.

The joints are tight and the exhaust heat shild is well held in place, but i'm starting to think that my rusted out headers are somehow leaking but why wouldnt it leak when cold... and the timing is pulled back to 2.5 degrees instead of 5 like it normally does