Tmony69

88 IROC 305 TPI BLM is 122 intergrator is 108. Nothing unusual on scan data. Fuel pressure 35 psi at idle, 42 wot, no drops. New plugs, wires, cap rotor, air filter, fuel filter, oil, and filter. All new gaskets. Injectors were professionally cleaned, tested and balanced, so was cold start injector. The car is running a little warmer than usual(210-219), even after new edelbrock high flow pump, new thermostat, new radiator, high pressure flush, fresh coolant, and additive. I am also getting some hard throttle pining, and timing is only at 6btc, and yes I unhooked the plug when I set timing. The car runs and starts great hot or cold. Other than the readings being off, and the pinging, it's great. I have a feeling that there is actually a lean condition, but some how the computer thinks it's rich. O2 bouncing around 200-800, but then out of now where goes down below 100(24-50). It doesn't last very long, but it doesn't seem to change BLM, or intergator readings. Did I miss anything?

Tmony69

I moved the MAT out to the front of the intake. Could that have any effect? I know that as the computer detects high incoming air temps it pulls timing out to prevent detonation. Could this be part of my problem?

ULTM8Z

I struggled with a problem like that, but it turned out that the chips I was burning were bad due to corrupted software on my PC. Don't know if you're burning chips or not...

When did you notice this occuring? Did you change something and then it started? Or did it start up by itself?

Basically, something is causing a lot of extra fuel to be dumped in and the computer is having to take it out.

Tmony69

The chip is a stocker, and the computer is a reman. I hadn't scanned the car until after the work was done and found the SES had tape over it, and guess what, good ol 32 was there and 34 and 36. I fixxed all that stuff, and it's still the same. I now have the timing at 0, and is running OK no pinging, but lost a little bottom end. The pinging and wierd running hot on the freeway just don't seem right to be rich. It acts more like it's lean and even though O2 says rich, so the computer pulls fuel out making the problem worse. What could cause a lean condition and fake the O2 out? Bad O2? I didn't change it, the only part I haven't changed. But the readings are lighten fast, and I've never had a bad O2 read that quick.

Tmony69

Sorry I got carried away there. To answer your question, everything, new parts, and repairs, got done at once. Didn't start the car up until everything was done. The bad connect at the MAF made the car run really crappy so it was kind of masking everything else. Don't get me wrong, the car runs good, and pulls hard. I'm concerned out the lack timing/pinging problem, and the temp creeping up on the freeway. You can let it idle in the driveway with the AC on all day and it won't get past 195. But at 65mhp 1850 rpm temp slowly climbs to 220 and stays there until you get back into stop and go traffic. Backwards huh? Somehow I think the timing, temp, and O2 are linked together.

1bad91Z

iTrader: (1)

Those readings are a little on the rich side. Moving your MAT to the air-lid will make your car run richer than it normally would.

Tmony69

can a bad o2 tell the computer that it's rich when it really isn't?

DannyT

Do you have the stock 19lb/hr injectors? What about an AFPR?
I would definitely change the O2 sensor anyways

Tmony69

Yes stock injectors. AFPR?

DannyT

Adjustable Fuel Pressure Regulator