KirkB
07-11-2021, 07:41 AM
Can you guys point me down the road or give your input. All new to Datalogging and diag from sensor values and would like your opinion on what I have. I have a 91 350 TPI with 305 heads running 10:1 comp on 93 oct gas. DTC currently are #13 O2 sensor (which seems to stay in proper value range) and is new this week. Also have #23 & #25 for MAT which makes sense since it's stuck at 61* F when it's at least 75* F in the shade. Also seem to have excessive blow by as vent V/C side will build pressure and valve side seems in working order and connected at lwr intake port with good vaccume. Vehicle seems to run like a loaded op 2 stroke when cold but when in open loop surging is gone but still seems choked as it doesn't respond well under throttle. At about 1 min in datalog I increase speed and knock counter goes wild showing retarded values but seems like timing advance values look ok so I'm confused but guessing I have more than timing issues going on under the hood. Anyone's suggestions appreciated and hope attachment works for you to view datalog.