I bought an exhaust set-up from MAC. The headers, h-pipe with cats, and dual exhaust. After a few months time I got the check engine light came on. Then I bought those 02 eliminator cables which made the light go off for about a year or so. Now in the last six months its been coming off and on, and in the best 3 months it hasnt shut off or go off.

I tried everything cleaning the O2 senors, i replaced an EGR valve, and I cant get the ligth to go off. The code read out always shows a cataylyst efficency on bank 2.

Any ideas would be greatly appreciated!!!

Also, I read that some guy said that its because the back presure is less going from the factory Y-Pipe to the after market H-Pipe, he said something about drilling holes and putting 2 screws , but really doesnt go into detail.

If anybody has any clue what to do please help!!

But I say dont buy anything from MAC, if they are making prodcuts that dont even work! What the hell ?!?

 

well obviously it works you just the check engine light came on, does it give you a deep sound?!?!?! ok then it works. I have MAC and havent ever had problems, who installed it, if it was a shop take it back and find out whats going on.

 

Maybe it might be something else

 

Don't worry about it, as long as it works, it's all good.

 

Put a peice of electrical tape over the light. Worked on my old Topaz great!!

 

LOL, thats awesome, I just took the cluster out and pulled the check engine bulb.....works just as effective

 

WAY to much work...I'm very lazy

 

No the problem is not that the light is on, its that it wont pass inspection WITH the light being on. So i need to have the light turned off, so it can pass inspection.

 

Well, how do you know what codes are going off? Theres thousands... Go to autozone and get a free scan. Dont the 6'ers not need back pressure because its an even fire engine?

 

engines don't need backpressure. it only hurts.