Originally Posted by BillBoost37
Only thing that comes to mind is you reduce rpm and add load to the motor. A change in map there should be normal.
Charlie, got your pm. I'm thinking you should tell her to make it soon.
I hear ya. But I need to back up... I put 50 miles on the car today and have a whole different read from the other night.
First, i have the elevated MAP reading at idle virtually all of the time. My -10 on the Boost gauge is equal to 10 or less inHG on my scantool. I'm getting 10.9, so the needle is up. Ratz. Plus my LTFT at idle is at 9-10. Double Ratz.
But here'* the VERY good news... before i replaced those HVAC vac lines, when I went on-throttle towards WOT, the composite of the LTFT and STFT would head screaming towards the P0171 range. Now they do the opposite, they head to (and bounce around) net 0.0. General driving around I'm a little lean in the LTFT 4 range (STFT near or at 0.0). But if the LTFT starts bumping up higher, the STFT immediately goes negative, to pull it back down.
(Note: I had to disconnect the battery while working. I know the computer needs a good 75-100 mi to get its act together. But IMHO, you can get general trends before the computer closes in on its hard numbers.)
Correct me if I'm wrong, but I believe this is good news for the INTENSE mods which have been sitting in a box over in the corner for 2 weeks, while I rewrote the script to this air/fuel soap-opera.
This still leaves me with issues in the low band. The MAP reading is not in line with the air coming through the MAF at idle, which ends up with the trims compensating to out-of-range readings. Idle is a distinct "cell" where the computer "learns", while it appears I'm getting love from of all of the on-throttle "cells" (accel, decel, WOT, etc).
I'm starting to think its time to revisit the lower than normal fuel pressure (low 40s psi vs high 40s+). One of the reasons is that I accidentally noticed something while in death-on-wheels mode. (That'* when I'm driving around scrolling and reading the scantool, while veering all over the road.)...
When I sit at a light and my foot slightly touches the gaspedal and gets the TPS from 0.0 to 0.4..., the boost gauge drops, and the MAP reading drops to 8.0 from 10.9. Where it should be at idle. ??? Weird.
That being said, I don't consider it a big showstopper, and the top-end is safe for mods now..
Any comments would be appreciated. Thanks.
PS. Bill, negotiations for a firm date are on-going. Trying to get those two to make a decision is like trying to herd cats.
I just mentioned to them that I'd like to get this settled while I'm still young enough to drive.