Weirdness with Quella: Attn Dennis!

[NISTECH]

Your Alpha indicates the car is running very lean. O2 also indicate that it is runing lean but that number will fluctuate rapidly. The alpha will not fluctuate that rapidly. I say your maf looks ok. so on a limb here I would guess there is a vaccum leak. I assume they removed the plentium to do the injectors so my thinking is either a vaccum line is off or they mistakenly split the plentium gasket.

Also the resistance problem could also cause this problem. If the ground is falling off prematurely or it is fading away to quickly the injectors pulse width will be shorter then the computer is telling it to be on. Did they get the injector pulse time on the printout as well?

[AZhitman]

I will inquire as to the issues you mentioned, NISTECH:

Vacuum leak, bad plenum gasket, injector resistance, and a look at the crank angle sensor.

Dennis, anything else should I specifically ask for?

[Q45tech]

Really hard to evaluate unless O2 are pretty new [?]........what would be nice is a FULL set of readings at 2,000 rpm cruise. THEN a WOT set [start the datalog at 3500 rpm and record to redline], be sure to provide ambient and altitude.

Both inj time, O2 voltage, block learn, advance, coolant temp, MAF, rpm, TPS.

Of course you must measure fuel pressure at WOT and all the way up to 6,000 rpm .......making sure it stays above 40 psi [43.4 psi]!