Can someone give me there impressions.

For the last 6 weeks I have been pottering with the FAST. I sufferred from some problems that just did NOT want to go away. I would get decel popping which I eventually solved by increasing my VE tables to about 80 'ish and I also had popping whilst holding the car at cruise levels. The AFR would be about 12.5 to 13.5 whilst this was happening.

I would also get an intake backfire sometimes on tip in. Logging also indicated a lean spike on tip in. That being said, once the car was up into the mid to high range it felt reasonablly good.

None-the-less, driveability was a major issue.

So a buddy came by to give me some time. He has an 8 sec 'stang and although has not worked on a lot of cars, he has spent a LOT of time with his own.

We go for a drive and he richens the VE tables up A LOT. I mean a TON. Mid range VE is about 90. The AFR is reading 9 -10's but there is absolutely no denying that the car is running very well. We may have to do a little more tuning at idle as it is a little rich.

He of course is saying, "this doesn't seem right. The VE numbers are WAY to high and the AFR reads really rich but..." I do NOT have black smoke pouring out the back. We pulled a plug and it looked great.

BUT here is the variable. The car has been burning oil - this was on a freash rebuild. In addition, at one point I pulled the O2 and "cleaned" it with WD40 which I have now been told is a 'no-no'

So can anyone provide some insight. Is the O2 faulty? Is there some calibration of the AFR/ wideband and the VE tables that are out of sync?

Or is it a case of "whatever works, don't worry about it?"
Thanks guys

 

glad to see you are making some headway. as an innocent bystander listening to your situation i'd say your o2 is giving false readings. your can't argue with the car running well no matter what the readings are.

 

I was told buy a very reputable mechanic (my Dad been wrenchin for 48 yrs) that even the oils on your hand can screw up an O2.
That beeing said i'd guess that the WD-40 bath didnt help much either. Put new O2's in it (dont buy the Auto Zone junk). Then go from there.

 

New WB O2's sensors are about $350 or so. No Auto Zone;s for me

However, I have been playing some more and the WB O2 sensor DOES seem to be working OK..........so far.