BACON BITES!

[popo8]

Erratic. It starts and idles fine (although I can't get it to stay alive under 1000 rpms) until it warms up and goes into closed loop. When it gets to around 13:1 afr it starts popping in the exhaust. Seems like one cylinder every few seconds. As it gets warmer it gets louder. Im wondering if the cap might be cracked.
Timing stays constant when it goes into closed loop by the way.

Are the O2s functioning properly? Figured u must be monitoring them as well.

And Im not sure how aggressive ur cam is... But i cant idle under 1k once in closed loop.

I also idle lean to keep the plugs clean. Usually anywjere from 15-17 during idle.

Co-Owner/Admin @ LTXtech.com

[firebird_1995]

This system only uses one o2 sensor. I currently have my lm1 wideband (with new sensor) with the analog output feeding the dfi. I don't think its a very aggressive cam, 223/234 .575 lift. As much as I want to find out what's wrong with it I was relieved to see taking the supercharger off didn't make a difference.
I know I'm nowhere near the dollar amount or time involved as The SRZ is but I could only imagine how much worse it gets as time goes on.

[popo8]

This system only uses one o2 sensor. I currently have my lm1 wideband (with new sensor) with the analog output feeding the dfi. I don't think its a very aggressive cam, 223/234 .575 lift. As much as I want to find out what's wrong with it I was relieved to see taking the supercharger off didn't make a difference.
I know I'm nowhere near the dollar amount or time involved as The SRZ is but I could only imagine how much worse it gets as time goes on.

You know it man.. the more complicated ...the more variables... the more confusing something simple could be. Is that set up required to run two o2s? for the computer to adjust itself. SOrry if questions are dumb... just trying to learn how your set up is.... and where it could be messing up... Obviously we never rule out the opti... however i would like to think something is happening when it switches LOOPS......

[firebird_1995]

No it only requires one sensor. It also operates the injectors in batch fire, like the 93. I've got a few datalogs and I've watched for something to jump out at me. For the most part it seems good. After startup the iac brings down the idle to around 1200, ignition advance stays constant, it will sit at about 11-12:1 running fine then when closed loop starts it begins to auto adjust the AFR to dial in the actual to requested. After it leans it out to 13-14:1 it starts popping. Kind of lightly at first, ending with firey explosions. I have tried different plugs, wires, checked for header leaks, changed the bad msd opti, ran with stock injectors and throttle body. The only thing left is the opti or the dfi

[popo8]

No it only requires one sensor. It also operates the injectors in batch fire, like the 93. I've got a few datalogs and I've watched for something to jump out at me. For the most part it seems good. After startup the iac brings down the idle to around 1200, ignition advance stays constant, it will sit at about 11-12:1 running fine then when closed loop starts it begins to auto adjust the AFR to dial in the actual to requested. After it leans it out to 13-14:1 it starts popping. Kind of lightly at first, ending with firey explosions. I have tried different plugs, wires, checked for header leaks, changed the bad msd opti, ran with stock injectors and throttle body. The only thing left is the opti or the dfi

Hmmmm, when you changed plugs...how did they look? Did they ALL look close to the same condition?

and are you just runing stock plugs, gapped at what (although that really only matters with boost.)

[firebird_1995]

All plugs looked identical. Soaked in fuel and carbon fouled. I started with auto lite 103 gapped at .040 then went to stock ac delco at .055 fouled it out and went back to the a103 cleaned up

[popo8]

All plugs looked identical. Soaked in fuel and carbon fouled. I started with auto lite 103 gapped at .040 then went to stock ac delco at .055 fouled it out and went back to the a103 cleaned up

Hmmmm ok.

So it def needs to be leaned out more when idling.....


And i guess right now it does not matter since ur not boosting ut... But thats a huge gap for boost. I gap .028-.030

But since ur experimenting...and not boosting right now....wamma try a hotter plug to see if it helps stay away from fouling longer.... And burns more of the fuel? ( shot in the dark really... But we need to get her to not soak plugs....

Co-Owner/Admin @ LTXtech.com

[firebird_1995]

What plug do you use?

[popo8]

Ill have to go thru my reciepts cause the afr 227s require short plugs . but 1 deg colder than factory

Co-Owner/Admin @ LTXtech.com

[popo8]

One of these...cant remember if it is the "x" or not

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Co-Owner/Admin @ LTXtech.com