maybe2fast

Running terrible, backfiring. Suspect opti, but we just replaced harness and installed a thought to be known good opti. Here is a link to the log files. alot of knock retard and in and out of closed loop. HELP...not an opti again. I need another set of eyes.

1994 Camaro LT1 M6, cc306, LTs, MadZ28 tune

https://drive.google.com/folderview?...jQ&usp=sharing

02s are switching and the other sensors seem to be performing propperly
the fuel trims seem rich at idle, but seem to regulate once some load is applied
the DTC is a 16, but we are not sure if it was an old code from before
no stalling

Injuneer

Clear the codes, see how fast DTC 16 comes back.

What are the differences between the 3 files?

maybe2fast

nothing. friend sent them for me to look at. I see that he was driving in one and just extended idle in another. Notice the excessive knock count!

Injuneer

So is this for your car, or for your friend's car?

A quick look at the 3rd of three shows that the PCM is repeatedly dropping out of closed loop, for extended periods.

maybe2fast

Not sure what the relevance of who owns the vehicle is, but its a friends and my sig stats that I have a 95 Firebird and I said in the 1st post it was a 94 Camaro LT1 M6 with a cc306 like me

It is a friends car and he sent me some log files. The open and closed loop was him turning open and closed loop on and off with FreeScan (sorry).

I had him check the plug wires and so far the drivers side was properly placed and the passenger side he labelled but is going to recheck. When the low res code (16) is cleared it does not return immediately.

Let me know it any other data is needed. Thank you

maybe2fast

we replaced the opti, and it runs better. It did have a weird stall after the install, but seems to be running well now. Will keep you updated

blac94Z

hey what is the Baro pressure-kPa and AC pressure ?