Scanmaster readings have me confused...

[fly89gta]

Ok, i'm running rich, hella rich..and my oil is very gassy smelling

Since i've had the car my BL's have always been low, like around 105. This is with stock injectors with trasher chip and now Blue Tops with Trasher chip

My BLM's while cruising are at 105, and don't move till i give it some gas, then they jump to 128 and lock there(just about, they might drop a bit to like 120) yet my INT stays at 128 usual, -OR- sometimes it will be 107 and jump to 118, then to 128 and stay, while the BLM's dont move

I'm getting 12MPG, oil is gassy smelling, WAS running 17#'s but i don't ever bring it up that high anymore, i was at the track the other night before i really started lookin into this problem and people said i was pouring black smoke, which indicates my richness..

FP is 45#'s line off, like Trasher wants, and turning down the FP doesn't do a damn thing O2's at the track were 850's until top of third where they were 810-ish

HELP!! Could a bad coolant temp sensor be it?? why is the oil gassy smelling..time for a new ecm? i'm kinda getting worried here

 

[fly89gta]

another thing is that i'm going into open loop at like half to 3/4 throttle, guess i should check the TPS sensor but that doesn't seem right to me..

 

[Dan Thompson]

Is there an exhaust leak before the O2 sensor, like a cracked DS header?

 

[fly89gta]

Originally posted by Dan Thompson
Is there an exhaust leak before the O2 sensor, like a cracked DS header?

not that i'm aware off, couldn't that cause lean conditions instead of rich?

 

[fly89gta]

hello? anyone?

 

[6=8]

Chip sounds fine...

Real Quick like...

I was reviewing the thrasher programming last week, and the 128 value is "Reset" after a WOT pass to prevent unwanted computer fuel changes during PE. According to the notes, if you were to let the computer adjust these settings without resetting back to 128, it could negate (Cancel) fuel pressure adjustments made with the AFPR. The other symptoms you describe also sound like some of the features programmed in the chip (Such as going in to open loop, etc.)

I don't have a thrasher chip, so all I can recommend is you find this site and read/understand what the chip is designed to do. I feel you are having some other problems causing the over-rich condition, and since the chip seems to be doing everything it can to let the AFPR set the fuel mix, I would not question the chip at this point. Maybe the MAF though! You sound like you are running too rich, no matter what you do!

Since you indicated this has been an on-going problem before and after changing the stock setup, I would check the fuel pressure again. If it is indeed correct, have your fuel guage checked for accuracy... Maybe you're setting it way high without even knowing it. Maybe the guage itself or the regulator is bad!

Other than this advice, I would see what other fine folks on this board have to say about correcting an over-rich condition. In the mean time, get some more background info on the chip you are using! It may help with the confusion and get you on the right track!


Good luck!

 

[fly89gta]

i'll check the MAF, but i've verified the FP with 2 differen gauges, and the regulator is new

thanks for the advice

 

[6=8]

Fly89gta,

At least we are thinking the same about the gauges!

About the regulator though...

I think the vacuum line is disconnected only for initial setting, then it is added back for normal service. There isn't a problem with this hose/connection, is there?

Man, what else could there be that would cause more fuel to dump in than you need? Other than a bad MAF lying to the computer about how much air is entering the engine. What about the camshaft sensor? Have you tried batch-fire mode by unplugging the cam sesnor to see if leans out a little? Heck, I don't even know if you can do this test with a thrasher chip!

Can anyone else take a stab at this one?

 

[fly89gta]

someone else said it could be the MAF as well, i'll try that, i just really hope i don't wash out the rings due to running that damn rich

I appreciate your help, I really do...just trying to think of anything I could say that would help with the troubleshooting....hmmm...could a faulty coolant temp sensor do that? I'm not sure how much of a factor that plays into fuel mixture on turbo buicks, i know it does on the TPI cars(the CTS that goes into the intake manifold). Maybe I should look at that as well.

Keep the idea coming!

 

[fly89gta]

throughout my problems the MAF and ECM have been 2 constant things, i'll start with the MAF, but is there a chance it could be the ECM too?

 

[fly89gta]

oh yeah, doens't appear my O2's are cycling all the time like they should be, O2 is brand new heated one, so that leads me to believe it could be the ECM, i dn't know, frustrating...

 

[fly89gta]

anyone else?

 

[SilverSleeper]

Just a thought...
Might be a leaky/stuck injector?
Will it hold fuel pressure after shutting the motor off? I had this problem with my stock inectors. The car would run really rich and the pressure would fall quick after shutting down. One of the injecors wasnt fully closing, letting more fuel in than it needed. Every time I would go to start it up it reeked of gas for awhile.

I would try a different chip if you can get one. It is always good if you can eliminate something quickly like that. Otherwise you may be chasing the problem down for awhile. Good luck!

 

[fly89gta]

takes about 20-30 minutes to lose all the fuel pressure which isn't too bad from what i'm told

 

[Night Train]

Lose the heated O2. Most have problems with them, either not coding problems or just not working correctly. There a few brands that some on the list have had better luck with, but I would try the O2. Might be the best $25 you spend.

 

[fly89gta]

Originally posted by Night Train
Lose the heated O2. Most have problems with them, either not coding problems or just not working correctly. There a few brands that some on the list have had better luck with, but I would try the O2. Might be the best $25 you spend.

i had the same problems with a regular O2 as well

 

[GNVAIR]

If you are running the stock non heated O2 sensor, then make sure that it is an AC Delco and not some off brand, Pep Boys deal.

 

[TT/Ameasap]

I have the same thing wrong with my car too!

blm's are at 105 all the time. Just put on 50# inj. and switched from thrasher 92 to pit-bull chip and now I have this problem

boost is 15# and FP line off 30#
and still running rich!


What gives??

 

[fly89gta]

what gives? i don't know but its frustrating

I don't really get on it at all now but if i do from a stop i let out a HUGE black puff of smoke

 

[TT/Ameasap]

TTT for ya!! or for us!!!