I would send you mine, but I hacked it into pieces to make my SRI

 

and just so everyone knows, we haven't nailed down WHY this is throwing a CEL, because nobody with a cel has put a wideband in the exhaust stream to take measurements. Until someone has those measurements we can't be sure if it's the SRI that is causing the CEL or the ECU not being able to compensate for it. We may be able to fix this problem with a little tuning, which you should be doing if you are modifying your car anyway my $.02

Drew,
I forgot to ask, have your outside temps remained stable, or did it get warmer when your CEL went out and snap back to cooler when it came back on?

 

No. It has illuminated during very hot weather!

 

tuning FTW then

 

i would understand tuning after installing a few different parts... but just for the SRI in its lonesome... kinda a waste of money specially since the SRI doesn't really make a big difference

I mean yes it does affect it to where its noticeable but my father-in-laws Dodge Durango 5.9 V8 shouldn't be getting better MPG than my 2.4 4 cylinder... thats just not right

 

that could be from your stock pig rich TUNE though

 

I fail to see how one would tune for SRI (at least when its coming to this lean code) other than patching the problem for unmetered air by increasing it by a factor... but thats not very linear (and is a very large factor considering that its maxing out the long term trims) and would involve a dramatic amount of work compared to utilizing the sensor in its intended fashion.

 

you're running lean until the code sets and then you are running hella rich because PCM is dumping fuel in a failsafe attempt and BATCH FIRING injectors dependent on load... and pulling a good many degrees of timing at the same time. Don't believe me? get a 4 trace or better oscilliscope and watch those injectors under load also note that timing advance while normal... ish under idle conditions will barely raise w/ rpm

 

see, the problems you are describing wouldn't be fixed with a tune if he was really maxing out his system, but he's not. nothing is being maxed, he is modifying his stock engine and finding that when you modify the engine sometimes tuning is required.

the problem we seek to resolve is an issue on some cars and not others. It is less likely this issue is really causing a lean condition as far as fuel is concerned and more likely the turbulence now in the air at the MAF sensor is throwing it off.

The stock tune on this car is so rich you can run much more that an SRI without a CEL. that's what is so puzzling about this code

 

SRI = Tuning< Money in Wallet

starting to think I shoulda kept the ES with alignment/suspension problems... would have cost less in the long run...

 

modding your car and not tuning=irresponsible

 

now we are back to tuning just for an SRI...

just off the wall.. whats a decent price for tuning

 

you should be tuning for all your mods, but yeah in this case it would have to be just for the SRI. changing anything on the engine will affect the way the engine operates, and therefore will change your optimum tune. The stock tune is far from optimum, and messing with the engine and not making compensations in the tuning is going to cause issues sometimes.

And I keep saying that it may not be something you can fix with tuning, it may actually be the SRI causing a problem with the MAF. the only way you can be sure is to either try and add more fuel to the piggyback without knowing what is going on, and that's a bad idea, or hook it up to a wideband and do some logging to actually see what is going on.

 

Jsut to bury the idea, I wont be buying a wideband anytime soon! The logic makes sense to me tho.

 

thats what I was saying, but the fact that the sensor is so far off range as to throw codes suggest a LARGE amount of correction needed... enough that it would probably be easier to just modify the intake setup so that the sensor works properly... instead of trying to tune the problem away.