a little about what im working with. 1990 chevy k1500. 496 stroker motor, bbc tbi, Ebl flash, initial bin is for the bbc 502 tbi. Truck starts and runs, but having a fueling issue. I did a 5 minute datalog that im hoping someone can look at and tell me where i need to make adjustments

 

cant figure out how to attach datalog file

 

Need to zip the .dat file first, then it can be uploaded.

RBob.

 

firstdatalog.zip

 

Not sure how big a cam is in the engine, but it is idling rather rough. There may also be a vacuum leak as the idle speed varies and the IAC is at 0 steps most of the time.

RBob.

 

Crower hydraulic flat tappet INT/EXH - Dur @ .050” Lift: 240°/248° RR: 1.7/1.7 Gross Lift: .557”/.578” LSA: 108° RPM: 2500 to 5900 Redline: 6400 Procomp 300cc aluminum heads, Scat forged crank, scat I beam 6.385 rods, Probe forged small dome pistons(10.1to 1 comp.). Running 93 octane. Longtube headers, Full true duel exhaust, no cats, flowmaster 40's. Drivers side header is leaking pretty bad at the head. gonna do a header swap. need to go with some mid lenght, long tubes interfere with front driveshaft. All brand new intake/ throttle body gaskets, as well as hoses . Vortec fuel pump, external regulator , mounted in the return line running 19 lbs pressure.