Injector Pulse Width

[bobbing]

Is the injector pulse width PID accurate? I have a 97 S10 4.3L. When I check the injector pulse width, one bank is 3msec the other bank is 300msec. Seems a little unrealistic to me.

[Weston@PPE]

Which PIDs are you looking at exactly? I just double checked GM.ENGINE.INJPWM_B1 and GM.ENGINE.INJPWM_B2 against the data GM sent us. They both follow the GM data, and are scaled exactly the same as each other. If you're looking at these 2 PIDs, you're seeing the actual values reported by your vehicle as far as I can tell.

If you are looking at different PIDs, let me know and I'd be glad to check into them.

Is your S10 running well currently, or are you chasing down a problem?

[bobbing]

The PIDs are:

GM.ENGINE.INJB1: Injector Average Bank 1 (mS)
GM.ENGINE.INJB2: Injector Average Bank 2 (mS)

I have a newer injection spider I installed 2 years ago (MPFI).
For the hell of it I took readings from my buddies 96 GMC 1500 Z71 5.7L and got the same kind of data (really high on one bank).

I will take another reading and let you know which bank is reading high

[Weston@PPE]

We have a fix for you to try, there are some things about that PID that look weird to me.

Please email support@palmerperformance.com with a link to this thread and we'll get the fix to you.

[bobbing]

I applied your fix.
I am getting readings in the 380-430ms range for each bank. Seems high to me (100X)

As a very rough guide the injector pulse widths for an engine at normal operating temperature at idle speed are around 2.5 ms for simultaneous and 3.5 ms for sequential.

[bobbing]

Could you apply a fix for this in the next release? You have both banks the same now with the last fix, but the numbers are 100x what they should be reading. 3ms is what an injector pulses at.

Thx