Bogging after Coasting

[XfireZ51]

Originally Posted by Ccmano

I’m going to be giving this method a try today or tomorrow. After I installed the Injectors and coils last week the IAC count was at 29. After resetting the IAC motor I got it down to 16. I can’t imagine it’s that critical but Mark certainly knows a heck of a lot more than I do.
H

I posted this a couple of years ago on setting Min Air :

As for setting the IAC count for Minimum Air, the procedure I follow is:
(Do this procedure once you have warmed motor to C/L operating temps. otherwise it may very well not idle. Also, you will have converted your throttle stop stud to a hex bolt I think a 7mm hex head. I would also recommend that u set the Min Air as the fans kick on as this puts an additional load on the motor and the IAC will compensate.)

1. Jumper the ALDL as you would for reading codes.
2. Turn ignition to ON, not start.
3. Leaving ignition ON, remove the IAC harness connector. This fully extends
the IAC pintle and closes off the IAC port.
4. Shut ignition OFF and remove the ALDL jumper.
5. Start the motor and get it to idle. May need to use a bit of throttle at first.
6. Check idle rpm. Turn the throttle stop screw until the motor is idling at an
rpm just below what your target idle rpm. I want my idle at 875-900, so I
set Min Air throttle at 800-825rpm. You may need to adjust TPS Voltage
so that ECM stays within idle TPS Voltage range.
7. Tighten everything up and shutoff motor.
8. Plug in IAC. I also undo the negative BATT cable to drain the ECM
memory.
9. Reconnect BATT turn ignition ON, and check TPS V. Adjust to .53-.57v if
necessary.
10. Start motor and quickly raise to ~2000rpm for a brief period. This resets
the IAC.
11. Shutoff motor, then restart. Allow motor to idle down and check your IAC
counts and your TPS Volt which may need to be adjusted one more time.

When u modify the motor, it obviously changes air flow, most likely to flow and need more. Adjusting the Min Air "gives the motor what it wants" as a well known tuner would often say.

Hans,

If u r swapping Accels to FICs, you will also need to change the
Injector Bias v BATT values.