Need Some HELP
>
> 1. Jan 07, had headers professionally installed on
> 01 A4.Dynamaxx long tube, entire exhaust system and Vararam then
> dynoed. Ran great lots of air in, lots out, never got/get good gas
> mileage 15 - 17 around town and 20-22 highway, before and after
> mods??. That was using real math not gauges, and foot off pedal so I
> could get good test. Just have to add - installed Borla Stingers
> last week - AWESOME ---OK on with problem.
>
> Long story short,several months after install, check
> engine light come on, several days in a row. Wrote down codes,
> brought to local dealer said bad sensors. Have been thru 3 sets of
> sensors, since install. Warranty company is getting upset. Last
> time it happened I brought it to dealer said same problem, drove to
> installer put mechanic and installer on phone, installer made some
> adjustments - ran like a top for about 4 months, gas milage
> increased.
> The other day I got a check engine light -- seems
> like about every 4 months same problem -- Didn't get sensor code - cant remember now
> what past ones were - was writing them when
> happening - will keep track as it happens and hope it doesnt
>
> Thx Len

 

If you gets codes post them on here. After a header install, O2 sensor codes are common. I've had P1153 insufficicient switching. P0420 (tuner forgot to tune out rear O2s when i have none), etc. I usually get O2 codes when it is cold. The front O2s throw codes even if they are good due to the cange in location. My tuner disconnected the front O2s from throwing a CEL but the car still records them. Check your codes and do a search on here. O2 codes are normal after header install. On guy on here had a blown fuse causing o2 codes, that was a new one on me. Anyhow, reset your codes and check them when they come on and post them.

 

Thanks I will do that - you think a year after install there should still be a problem?? Heck guess so been through 3 sets and that might not been the problem. Codes all are talking about I have never seen.

Yes- dyno after the mods -- While exhaust and intake were being installed I had new plugs and wires put on
That begs the question what is the difference between a tune and dyno? I have looked on here and gotten 20 different answers.

New to C5 - when i run the codes I can see H - C and numbers
I have the code list.

But everyone says do a search on here....I have tried that, is there a secret i need to know about, to find what i'm looking for. What is the best place to look - i think there is scan and tune then Tech which is the one i should be using ---I should have kept my 63.67, 72,77 heck I could work those - but the newer ones are great on a trip - like being in your lazy boy at home. my others would wear you out on a trip -

What do the little stars below our names mean - thinking number of posts or replies???

Pen and paper are in car -- nothing goes wrong hate these problems
Apprecaite your patiance with an old fart using a computer ---

 

Stars mean nothing to me. Anyhow, the following thread is typical of what I find on searching: http://forums.corvetteforum.com/show...ighlight=P1153

Personally, my car set a new O2 code 6 months after my header install. I think it may be related to weather conditions at which the PCM sees values outside of the expected range at that point in time. H and C tell you whether the code is current or history. History codes may not be pertanent. I had much help on the forum saving me time $$$ and frustration, so I try to help as much as my limited knowledge will allow. I recommend resetting your codes and see which ones come back. Keep in mind, some common header related O2 codes are P1153 and P1133. Also P0420 and P0430 ocurr and should be turned off by the tuner as you no longer have rear O2s.