pinpoint engine noise

[Torinalth]

hey guys, I've been saving up some cash to replace a few things on the car and am trying to figure out what the cause of my noise is so i can corispondingly fix it with performance parts

anyhow. i've been going back and forth on if its detonation, or something else. i only really seem to hear it when i wind out to redline in second gear, and cant remember if it does it in third... anyhow, its kinda a metal rateling sound and cant figure out if it is detonation or something in the midpipe, etc. I've run 87 and 93 occtane with no change... seems that i dont notice it (does not mean its not happening) when its cooler out. any other way to test it out? if it is detonation i think its because i've gotten to lean and i'll get the Xcal... if its not then i'd like to get my midpipe. any way to be 100% sure its detonation or not will be most welcomed.

Torinalth

 

[sgarlic]

Sound like that dieseling noise when you shut an old car off and it keeps blubbering?
That's the detonation noise.. and if it doesn't happen in colder weather, then detonation is DEFINATELY a possibility. It's more noticable when hot temps are introduced.

I would suggest doing something QUICK if you're having this problem often.. these stock internals won't take a whole lot of detonation without giving you some feedback..

 

[Torinalth]

hmmm... guess i'll get the tuner first then and richen the mixture first off. it kinda sounds like i have a rock stuck in my midpipe that bounces around under WOT from like 4k-5.5k been seriously hard to figure out it not being consistant... but it has happened a lot, and for a good period of time... if it is detonation i suppose i am lucky. I'll grab the tuner online tonight and see if it fixes it. at the very least i can go to a premium mode and get some power

Torinalth

 

[BennyBlown2v]

If it is detonation it could be a number of different sensors that are screwed up, how is that lucky? lol

 

[Indy_00GT]

check midpipe for loosened nuts. It could be something like the connection between the headers and top of the mid pipe. Easy fix if so...