Accel 6 DFI Help
Accel 6 DFI Help Friend of mine has a SBC with the DFI system, and when you rev the throttle real fast and get out of it, it back fires out the intake. car revs up fine if you do it slow and drop it, even semi fast, but when the "pump" table is activated, it back fires. i even maxed out the tps and map tables and it STILL is too lean and back fires out the intake. im really freakin lost. its been on a dyno, car was fine, over the winter, now it back fires out the intake, nothing in the setup has changed. PLEASE HELP!
no, hes the one that taught me what a timing light was. hes the old school guy, im the ls1 guy who pisses him off cause i went 11.5 with a stock motor and hes yet to see 11.5 with his monstrous bad *** sbc.
i did some research and some people with this problem actually had to send the unit back to accel so i can be repaired. *roll eyes* this is gonna suck.
i did some research and some people with this problem actually had to send the unit back to accel so i can be repaired. *roll eyes* this is gonna suck.
There are 2 or 3 tables that have to do with rapid changes in MAP...you know replacements for accelerator pumps and power valves. I have a high performance 406 with holley 950 port injection and The rate of increase needs to be really steep for a large cammed engine that flows a lot of air. With the ls1 we have the MAF to tell the computor to dump in lots of fuel but with SD you have to get the values high enough to keep it from going lean.
I would check timing at idle and at 3000rpm to make sure it is following the spark map.
Then new plugs - check wires, rotor and inside cap.
Then play with the Accelerator maps. Holley has some flow charts in the manual that are worth following, for different rates of throttle opening.
Jim
Then new plugs - check wires, rotor and inside cap.
Then play with the Accelerator maps. Holley has some flow charts in the manual that are worth following, for different rates of throttle opening.
Jim
explain to me, preferablly in a pm, someone!!! what the hell is dfi????
does it replace the ecu, and harness>>>> how do i still have blinker, headlamps, and such and so on... is this ideal for my plans on a 402 ls2 w/ p1sc twin intercooled???
does it replace the ecu, and harness>>>> how do i still have blinker, headlamps, and such and so on... is this ideal for my plans on a 402 ls2 w/ p1sc twin intercooled???
