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11-06-2010
So my grand prix was straight piped for quiet sometime and my check engine light was always on for the o2 sensor, i just had the cat installed and the o2 sensor and my check engine light went off then came back on and continues to do so, i went and got it scanned and it said it was an o2 sensor. my friend said this happened to him already and is normal.. is this normal or is something wrong
11-06-2010
NO not normal need a new friend lol, The new cat might be too small
11-06-2010
I know of a few people that have installed "aftermarket" cats. Apparently, they don't quite do a good enough job and the computer throws the code. They just put black tape over the light.
11-06-2010
If it is a universal or high flow, they will still trip the code...IMO, I woulda just left it out so you could always rule out a converter as an issue.
11-06-2010
Yeah some universal or high flow cats will set the code. Put a spark plug non fouler around the 02 and it should fix your problem.
11-06-2010
That's a big thing in the foreign car world, especially BMW and Audi from what I've read...it works and its cheap.
11-06-2010
yeah, i had to put a cat on because the first owner didnt have one and noone would pass my inspection and it is an aftermarket cat and the code is now gone, does the computer just self adjust to the cat or am i an idiot?
11-07-2010
When it adjusts you know...because the code will either be on or go off.
Like stated...high flows sometimes flow too good for the rear o2 to believe there is a converter there so it does throw a code. But who needs a rear o2 anywayz
11-07-2010
Had this on my GT after I Installed a ZZP Catted Downpipe ... just had the code set to no report ... problem solved
11-07-2010
well in my state to pass inspection you must have a rear o2 sensor to pass so, thats why i have one, i was straight piped for the longest time and i may go back that way very soon.
11-07-2010
Blue is from the same state as you.
11-07-2010
oh didnt even notice, yeah blue your pretty close to me, my buddies dad runs a golf course in liberty.
11-08-2010
Cardinal Hill? I live in Liberty right by the High School. I got a guy if you need it inspected, let me know.
11-08-2010
no i just passed lol. Do you know a guy named devin montague? im good friends with him.. I live about an hour south of you actually. St. Joke Missery (st joseph)
11-08-2010
Nope, don't know the guy...does he have a certain car or something that I should keep an eye out for?
11-09-2010
A certain car... Well has certain carsss... Hes dad collects late model mustangs and vettes and he himself I believe drives a porsche carrara (sp)
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