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MAF gets dirty, reads lower? & my O2 never reads > .
Posted: Thu Oct 27, 2005 4:54 am
by douglas vincent
So it used to be that my MAF at idle read .90 average on the multimeter. Now it reads .3 and I am getting a piss poor general run. i.e. it tends to miss.
also, my O2 sensor now never reads above .51. No matter what I do, full boost, full throttle off boost, whatever.
Just venting.
but then again, even though the wagon runs kinda like crap, on boost I get full power and no knock. go figure.
Posted: Thu Oct 27, 2005 5:08 am
by vrg3
The lower MAF reading could in part be a result of the misfiring rather than a cause.
Is Torco sensor safe? Maybe it contaminated your oxygen sensor. I really hope you're running richer than 0.51v on a properly functioning oxygen sensor.
Posted: Thu Oct 27, 2005 5:20 am
by douglas vincent
Yeah, I don't know. One of those things where you dont know WHAT exactly is doing the fuckup. And therefore it takes ALOT of messing around to figure out what is going on.
I have a few theories which I will attempt to correct in the next few days, if I have time. Yeah, its all about time. And sometimes money.
Posted: Thu Oct 27, 2005 5:25 am
by douglas vincent
OH, and my messed up O2 sensor may be whats making everything run right.
Here is my theory.
On boost.........
MAF is crazy high 4.7 -5.0
O2 sensor is only .5
This means lean condition.
ECU may attempt to correct by both pulling times AND dumping more fuel.
Is this a possibility?
Posted: Thu Oct 27, 2005 6:12 am
by vrg3
That's possible, I suppose... I don't know.
Couldn't the misfiring at idle be due to the big injectors?
Posted: Thu Oct 27, 2005 6:16 am
by douglas vincent
yes, but I didnt have this problem before on the previous engine block.
Posted: Thu Oct 27, 2005 6:20 am
by douglas vincent
My O2 sensor could have been damaged by the torco. Its a possibility.
But the MAF has me puzzled. I will be replacing tommorrow.