FITECH EFI TUNING tips, info sharing, ideas, settings, etc...
Guys, hoping you can help out this B body. You guys seem to be better versed in the Fitech issues. I'm getting a bit desperate.
Engine: 440
Fitech: EFI 4 600hp
Vacuum: 7.5hg
Cam: Comp cam 21-225. Intake 240 duration at .050, total lift .507. Exhaust 246 duration, total lift .51. Lobe separation 110.
IAC at idle: 3-10. +11 to 21 when fan is on.
Timing control: No (Started with timing control but could not make it work. Fire but would not run)
Idle RPM: 900
Cam is set to #3.
Ignition is a MSD pro billet, MSD 6A ignition.
I've fought this thing for 3+ weeks now. Car is not yet driveable so everything is parked.
Initially I tried to run timing control but the car would not run. Fire but would not run. Tried all the tips I could find. Finally switched back to distributor with TACH setting.
Fitech sent me a new IAC since I did post periodic P0505 IAC faults as well. Replaced IAC with new one sent from Fitech.
The engine fired right away after the change, ran good, warmed up and settled into its learning routine.
It has a tendency to quit without warning. Posted some 53 faults, not sure what these are or the causes. Not all the time and not consistent.
I've done numerous steps to try and shield wires and even moved the coil away from the Fitech unit.
Car ran for 6 minutes this morning then quit on its own again. No faults posted. Once it quits on its own it will not start again unless I do a hard reset.
Ran it again for about 3 minutes, at temperature, with no problems but it did post some code 53 errors early but apparently worked through them.
I have been logging data for about 11 runs now and can't seem to find the issue in the data. I did notice that the Spark Advance readings seem very
"noisy". See the chart.
Any suggestions out there? Not sure where else to look. I have emails into Fitech and will be calling again in the morning.
Thanks
Guys, hoping you can help out this B body. You guys seem to be better versed in the Fitech issues. I'm getting a bit desperate.
Engine: 440
Fitech: EFI 4 600hp
Vacuum: 7.5hg
Cam: Comp cam 21-225. Intake 240 duration at .050, total lift .507. Exhaust 246 duration, total lift .51. Lobe separation 110.
IAC at idle: 3-10. +11 to 21 when fan is on.
Timing control: No (Started with timing control but could not make it work. Fire but would not run)
Idle RPM: 900
Cam is set to #3.
Ignition is a MSD pro billet, MSD 6A ignition.
I've fought this thing for 3+ weeks now. Car is not yet driveable so everything is parked.
Initially I tried to run timing control but the car would not run. Fire but would not run. Tried all the tips I could find. Finally switched back to distributor with TACH setting.
Fitech sent me a new IAC since I did post periodic P0505 IAC faults as well. Replaced IAC with new one sent from Fitech.
The engine fired right away after the change, ran good, warmed up and settled into its learning routine.
It has a tendency to quit without warning. Posted some 53 faults, not sure what these are or the causes. Not all the time and not consistent.
I've done numerous steps to try and shield wires and even moved the coil away from the Fitech unit.
Car ran for 6 minutes this morning then quit on its own again. No faults posted. Once it quits on its own it will not start again unless I do a hard reset.
Ran it again for about 3 minutes, at temperature, with no problems but it did post some code 53 errors early but apparently worked through them.
I have been logging data for about 11 runs now and can't seem to find the issue in the data. I did notice that the Spark Advance readings seem very
"noisy". See the chart.
Any suggestions out there? Not sure where else to look. I have emails into Fitech and will be calling again in the morning.
Thanks
