Datamaster Results

[iggy913]

As some of you know I have been working on a fuel mileage issue with my 93 Z28. I finally got my hands on my buddies laptop, an ALDL cable, and a copy of the TTS Datamaster software. I installed the program, and the driver for the cable and presto we have data streaming to the laptop while the car is running. Pretty neat to see it in realtime.
So I sent a copy of the datalog to Solomon of LT1pcmtunning.com and he told me I had a bad O2 sensor on the passenger side, numbers were all over the place, and an error code 26 for the CCP system.
I've looked all over and found the CCP system has something to do with capturing fuel vapors, is this a neccessary system to keep? It has a solenoid on the passenger side of the intake manifold I believe and some vacuum lines running off of it. Is there a way to remove it and keep everything happy? It seems like a possiblity to remove some clutter under the hood and cap off some possible vacuum leaks?
Oh and the funny thing is the CCP code should have thrown the check engine light but mine is not lit, I think the previous owner pulled the bulb for it in the dash, what a tool! Lets pull the bulb for the check engine light instead of fix the problem! Mouth Breathers, I tell ya!

[Z28pr0jekt]

26 Evaporative Emission (EVAP) canister purge solenoid valve circuit Quad-Driver Module (QDM) #1 circuit
applies to:
- AIR pump relay circuit
- EGR solenoid
- EVAP solenoid

[iggy913]

So what does that mean in English? Does that just mean something is wrong with one of those three systems? I'm getting ready to eliminate the egr and air systems and will have them turned off in the tune. I guess that means if the code is still there once that's done I'll know it's not those two systems.

[Chris]

When my car had a 93' pcm it threw the Quad driver one code. Nothing to be worried about.

As for your o2' if your o2 was bad the numbers wouldnt be all other the place they would be flat lined. <_< Unless you are shorted out or something.

[Z28pr0jekt]

yes one of those systems is screwed up

[iggy913]

The readings on both sensors were a little below average and the passenger side sensor was reading well below the drivers side but would also read the same as the drivers side at times. It does sound like a short but with 100k miles and not knowing if they've ever been changed I have ordered new oxygen sensors so well see what happens. Thank you all.