Question concerning a recent tune up

[jamessr]

I just had the plug and wires changed on my car, however I notice at my exhaust there is a small thump/popping sound. It doesn't sound like detenation or anything terrible just a constant small thump/popping sound once it warms up. I left it there over night and the guy looked at it again. No codes are showing, he drove it and with my permission loaded it up to see. The engine isn't missing, not idling rough but the sound it driving me crazy cause ofcourse I didn't notice it before. I have a Borla cat back stock headers. Anyone ever run into this issue or maybe have a suggestion?
Btw no power lose in the car, its actually better.

Thanks in advance

[jamessr]

[johnjzjz]

Originally Posted by jamessr

I just had the plug and wires changed on my car, however I notice at my exhaust there is a small thump/popping sound. It doesn't sound like detenation or anything terrible just a constant small thump/popping sound once it warms up. I left it there over night and the guy looked at it again. No codes are showing, he drove it and with my permission loaded it up to see. The engine isn't missing, not idling rough but the sound it driving me crazy cause ofcourse I didn't notice it before. I have a Borla cat back stock headers. Anyone ever run into this issue or maybe have a suggestion?
Btw no power lose in the car, its actually better.

Thanks in advance

when i was a kid an old timer showed me a trick they used in the 30s before testing equiptment was invented, for telling if a cylinder is not firing in the motor -- take a single piece of loose leaf paper tare it in a 1/3 rds take one piece and place one end against the exhaust pipe alowing the paper to fly like a flag and listen - if it has a miss it will make a banging POP sound each time the cylinder does not fire corectly -- to check if you have it correct remove one plug wire and try again that wil be the sound of a dead cylinder a partial dead cylinder will have a much lighter banging _ POP - sound -- this will not really be easy with a hot cam or more than stock compression as the exhaust note is interupted by performance parts --- jz

[Slo86Bird]

i just got my car like 3 weeks ago and i have the same sound. i cant remember if it was before seafoamin it or after seafoamin it.....

[jamessr]

Well I found out what was making my noise. #1 and #2 plug gaps were closed. Here is the link

http://www.njfboa.org/forums/showthread.php?t=27004