High idle - high IAC steps

#11 · April 17, 2019, 2:03 pm

Means nothing.

#12 · April 19, 2019, 3:48 pm

https://www.dropbox.com/s/khjecc0ycui3e6k/DashBoard10.csv?dl=0

Here is a link to today's log. Set to cam #2 and reset learn. Cold start the idle was 800-900 until about 140 degrees, then it increased to what you see in the log. That is what is has been doing though. Only difference in the way it ran was that when I blipped the throttle the idle came down and almost died before going back to the high idle state. You will see that in the log. I did it again later and it did die.

#13 · April 19, 2019, 6:40 pm

Look at your fuel learn. It is maxed out to the negative. This means it is trying to pull fuel from the tune and can't pull anymore. So the system may be adding IAC to get the airflow to keep the AFR correct.

Hold a camera over the throttle body and record while running. I wonder if you have an injector hung open. Normally it would throw a code, but this has me confused. Also,what is your fuel pressure? You are running a return line, correct?

#14 · April 19, 2019, 6:42 pm

Also, I have never grounded the Fitech Black wire. That is for firing the coil when using timing control. Maybe?????

#15 · April 19, 2019, 9:29 pm

I just checked and I was wrong on the black wire. I do not have the Fitech black wire connected to anything. That was another ground that I had run in the same loom.

Yes I am running a 3/8 return. I don't know how accurate the gauge is, but when it pressures up to start it is close to 60 lb. I looked a couple of times today while idling and it was showing only about 45 lb.

I have more pump than I need but the Fitech regulator should manage that. Tanks Inc. GPA-6 High Performance Fuel Pump Module - 400 Liters Per Hour (Walbro)