Tunning question

[asshanson]

Does the airflow signal look normal when this happens? Or is it really just the car running rich with nothing else changing? Can you log a bunch of sensors to verify nothing is changing?

[Gravy]

I should have over a dozen logs, and i've tried looking for anything that changes, Hrz doesn't change any that i've seen, tps doesn't move, but when it goes over the oxygen sensors do register it. Twice in the past two days now i've got it to throw a CEL. However, when i go to pull it nothing is stored. I've even tried to read it when the light was on and still shows up nothing. Happens if i cruise for a long time at the 10.1:1 or around that area, so i assume it's giving me an Oxygen sensor code... but why it doesn't stay is beyond me.

Tonight i'll be going though the logs, i have everything logged as of right now, and am going to make sure nothing is changing when this happens, but i havn't seen anything yet. Someone said it could be the alternator, and i thought long and hard about it, but that's not coresponding, neither is any extra draw or anything else. When the alternator is on, i see about 13.8-14.1 volts, and when it's off it sees high 12's. However it doesn't corespond to the switching. I'm thinking of improving a few grounds and adding a few to the engine bay to rule out that as an issue, but i've got no reason to think that's a problem.

Still quick enough to keep away from a camaro with exauhst, so performance isn't affected at all. Just runs kinda rich, and ruins my gas millage.

May have found something, front 02 is cycling MUCH quicker than the rear, rear doesn't cycle often and when it does it's only for a short time. Doesn't seem to match the symptoms of the rich/lean problem much, but it looks to be a good place to start.

[niterydr]

Originally Posted by Gravy

I can see if anyone has a spare i can borrow. I'll post up on the local 3/s forum. But i have had my caps replaced before they went bad, and i don't imagine them going bad already again. Still does it now, but runs much better than it has in the past.

If the injector drivers or something else in the ecu was damaged from the leaking caps, that could be causing the issue.

[Gravy]

The rear 02 sensor is almost always reading .02v or .94-.95 if i remember correctly, and nothing else. Checking up on them at work to see if one can be gotten, otherwise i'll end up going to the dealership to find it there probably. Not sure of any stores that carry it locally in stock.

Also took my intake off last night and was followed by the following words, "Holly blown turbo batman". Looks like the rear turbo's oil seal may have gone, and if it's going out the exhaust as well(which i see no smoke from) it could cause some issues with the 02 sensor. But my intake around the sensor has a nice trail of oil on the bottom of it, going to use some Mas cleaning spray to clean off the sensors in the intake. And i may be in search of a 13g or a stock 9b turbo to replace it. But i figure if it has to come out, may as well upgrade.