When you installed the 140amp small pulley alternator did you change the drive belt or use the OEM belt?

Ed

 

Thanks for the reply.

PCM power reset could be caused by a bad PCM power relay. Will disassemble relay and check contacts or replace. I have had relay issues before but not with the PCM.

"Vref": is that the FICM or system Vref? I have no injector codes or indication of a bad injector when the motor runs.

ED

 

Use standard belt with the 58mm pulley

Josh

 

Vref is the 5 volt system reference, not just injectors.

 

I said nothing about a relay. I said the pcm is reseting from either a vref or injectior short. That is my uneducated guess.
The fact you dont have injector codes is completely meaningless, the fact you have a truck that resets the pcm when it happens means you at best would have a p0603, p1000, p2614 or p2617, p0344. Its restting and basicly ram memory.

 

If one were watching the Vref and it was the Vref that was shorting would
you be able to see that on the SGII or would you need something with a bit
more power like a VCM with the data recorder dongle?

Also if it was an injector would that show up with VCM and recored?



Sean

 

To catch a verf short mid stream my guess is an oscilloscope. No the vcm wont catch an injector shorting out in that manner.

 

When an injector shorts out.
You could lets say be running down the road nice and happy
and BAM it hits you. Does it go to a full dead and have to
restart or more of a stumble? I would think that if the PCM
was doing a reset that you might have to restart.



Sean

 

"Uneducated guess"

he he he. Yeah, that's a good one. Thanks for the humor this morning.

 

Its an instant death. Would feel like someone just turned the key off.