Originally Posted by babywag
In CL BLM & INT should be ~128
Anything under 128 the pcm is pulling fuel over 128 adding fuel.
Cannot tune VE tables without them.
Need good data to get in ballpark.
Ok, that's what I assumed but wasn't sure. I did use them for the VE tables but plugged them into the excel spread sheet and it did the computations.
IT'S "FIXED"!!!! It was distributor phasing!
Sorry the pictures are so bad. It's pretty hard to get these pictures. I basically video'ed them and screen captured it.
Here it is with the timing plug pulled (timing at 0 degrees):
Here it is at idle with the timing plug in (so timing is at 20 degrees advanced). With the spark that far over, I don't know how it even ran at max timing!! I should have had LOTS of mis fires and back backfires.
I pulled my dizzy, brought it into the garage and unscrewed the pickup lockdown screw. I marked the location of the #1 stud on my cap adapter and rotated it so when the star wheel and magnetic pickup were centered for #1, the rotor tip was just passed the stud. This would mean that at 0 degrees, the spark should be on the trailing edge of the rotor. This moved the pickup about 10 degrees so I screwed it back down.
Here it is after moving the pickup. This is idle at 0 degrees timing:
And the best picture! At 20 degrees of timing, it's pretty much centered.
I took it for a spin. Did my normal route, with 401 tune. I did not data log because I didn't feel like grabbing my laptop and booting it. Got up to 70, eased of the throttle.... NO BACKFIRE!!!!! WOOOOoo HOOOO!!! I got off the freeway, headed down run 3 and cruised at 50, NO BACKFIRE!!!! I was feeling pretty triumphant as I turned at the gas station heading toward home.... then it stalled.
I cranked it over, no start. Are you
'ing kidding me?!?!?!?! Fuel pump died. At least it doesn't backfire anymore.