Hey guys, hate to post this but I'm kind of stumped. I have an VR6 Stage 1 OBD2 Corrado that the other day was running great, 12.6-12.9 range on boost, 14.6-14.9 while cruising. Nearing the end of my cruising I was in need of some gas and stopped to fill up. Started heading back home and decided to get on it for a second and once I did it went no where, no power AT ALL! Looking at the boost gauge at around 3200 I was @ 5PSI but only pulled like I was at 0. By the time I realized I was probably running lean about 5-10 seconds had passed. So I opened the glove box (where my wide band is stored) and even at cruising throttle It'd fluctuate around getting 14.6-15.6 on the gauge, MUCH to lean of course for just cruising. The oment I'd get on it it would occasionally run very well, richen to 11.6 but then peg out around 12.6-13. Not exactly as good as before but acceptable.
I figured at this point, given the MAF is a used component that maybe it was starting to go out as well as maybe bad fuel (place I stopped at didn't look to be used as much as some other places). So a few days go by, I drained the fuel out entirely, put in fresh and tried to start the car. For some reason it wouldn't start, long story short I unplugged my MAF and the car fires up and runs fine (albeit a check engine light on now). I figured I'd see how it ran with the MAF unplugged because I figured it's in safety mode and would run the system richer than usual which would point me to the MAF being the issue...Nope, no such luck. At idle I run well, 12.6-12.9, but under boost it goes to 11.6-12.6 for a few seconds and then walks itself out to 13-14-15, by the time it is hitting 14, I've usually let up but it's what the scale is showing so I figured I'd let you know.
So, with the MAF unplugged I run just as lean when (at least with stock VR's) I should be pegged fairly rich in all parts. What would just up and suddenly make the car run like crap now? I have a known good 4bar fpr from a OBD1 car, could I run that and see if things improve or would that be to much?
Stock VR6 head & block
OEM G60 fuel pump (unsure of age/mileage)
Fresh fuel filter (just installed in Feb)
30# injectors (truthfully need cleaned but ran fine on the previous car)
Intake - 3" K&N to 4" MAF housing back to 3" all the way to 3" turbo inlet
All Vac lines checked and good (only have I think 3 due to all emission being taken out)