HELP!!!

wiring,

This is a long shot but I would if you are having a problem with the TBI injectors (they have a short in them) that when the fuel demand goes up the fuse blows.

"SnoMan" wrote: > [quote:fe4463976f="Ken"]I have a 92 Chevy Z-71 extended cab, > 5.7 liter motor, 700r4 non electtronic trans. I am blowing the > ECM-IGN fuse... When you start to accelerate the fuse will > blow. I have traced ALL the wires for one that has shorted > out, and no luck. I have checked sensors, and wiring, with no > luck. I need HELP!!! > > kEN[/quote:fe4463976f] > > This is a long shot but I would if you are having a problem > with the TBI injectors (they have a short in them) that when > the fuel demand goes up the fuse blows.

I have not blown the injector fuse. Just the ECM fuse. The injectors are on a totaly seperate fuse, as far as I can tell. I am frustrated :cry:

They are controled buy ECM though. I said it was a long shot. You may have a bad ECM too. I replace on a few years back in a 90 (which would use about same ECM) and it was 90 bucks at Advanced Auto. Are you getting any codes in ECM before it blows? Never seen a problem like this, They only thing I can think of is injector and TP sensor and MAP that checks a lot when you step on gas but those are just signal lines to TP and MAP. ECM does power lockup converter but not sure if you are getting that far.

"SnoMan" wrote: > [quote:3349df72f5="Ken"]I have not blown the injector fuse. > Just the ECM fuse. The injectors are on a totaly seperate > fuse, as far as I can tell. I am frustrated > :cry:[/quote:3349df72f5] > They are controled buy ECM though. I said it was a long shot. > You may have a bad ECM too. I replace on a few years back in a > 90 (which would use about same ECM) and it was 90 bucks at > Advanced Auto. Are you getting any codes in ECM before it > blows? Never seen a problem like this, They only thing I can > think of is injector and TP sensor and MAP that checks a lot > when you step on gas but those are just signal lines to TP and > MAP. ECM does power lockup converter but not sure if you are > getting that far.

If I jack up truck and put on stands, I can run it up to 90 with no problem. Under load it will blow fuse. No codes to ECM. Would it go through ECM before the fuse??? I have been told to check o2 sensor, seems that if it were the TP it would do it in park when I rev up the motor. What about the ESM controller??? I have ran aan electronic short finder along the wires, and it shows open all the way. I am puzzled :?