Tired of reading and not finding answers - need some help.
With a ARAP bin and a $6E mask, I'm looking for how to change the injector constant. I can find two lines that look like it refering to single fire and double fire mode at 40 psi. Is this it? Tried adjusting this in double fire mode since I figured from what I have read that this is how the car is running. The setting that was there to start with was about 37. I am running 24 # injectors, so I dialed it down to 24 and the car would barely run. How is this supposed to work?
How do I adjust the idle speed, ie, what parameter in the $6E mask do I look for. I couldn't find one that was straight forward, or do I have to play with one of the IAC lines?
Any and all help is appreciated

 

Are you using tunercat? Or other?
Yes adjust single and double fire-I leave them both the same constant.
What scan tool/program are u using? You must have one! adjust to blms of 128,s.
Desired idle speed vs coolant temp.

 

Using Tunerpro RT. Interesting about using same value for single and double fire as mine has 37 for double and a value of something like 130 for single fire. I use tunerpro RT to scan. Desired idle speed vs coolant temp - okay, thanks!

 

Careful with that, in double fire mode, the injectors are firing half as much, so the constants will need to be different. Also, make sure the conversions are right in Tunerpro. IIRC, the injector time is 1/flowrate of one injector.

 

Something doesn't sound right. When does the ECU enter double fire mode? How should we caculate the change? Arap bin should show as follows using a 6Ev011.ecu mask...

 

Both double fire and single fire need to be the same. When you change your injector constant, change it to match in both constants.

The 6E ECU/XDF included with TunerPro does the correct conversion. (I've done plenty of inj constant modifications to my own tunes to know).

 

For some reason I remember one needing to be 2x the other. Oh well, jsut ignore my comment.

 

DOH! My bad... Ive been working in assembly/raw binary so long that Ive forgotten that the tuning software packages covert the inverse flowrate over to actual flowrate. In the actual bin the stored inverse flowrate for single is 2x that of double fire mode. Havnt really used a tuning package in over a year and at this rate Im going to forget the decimal system.