So I took my car to a friends shop, and after we got done working on it and i left to go home i noticed that there is a wierd vibration coming from under the car. did we forget to put somethign in? I can sort of feel the vibration. Could it be from not putting the main cat hanger back on correctly?

 

if your exhaust is hanging incorrectly then it could cause some unwanted vibration, but you arent really explaining it too well. have you not taken a look at it yourself? we have no idea what youve done. . . did you make sure you put the ground back on? id say get back up to your friends shop and check it out.

paul

 

Basically we partially took off the DP, and the put it back on and got the probe in and connected the main cat back to it and made sure everything was snug. We had to take off the main cat hanger, we didn't take any grounds off.

 

Ok, if it was fine before the EGT install, then recheck your work.