Send my ecm off to auto computer specialist and got the email this morning the found shorts in my lift pump circuit, app pedal & cpu. Truck has a fass 100 on it which seems to be working fine( it's running and it's pushing fuel to the vp) & I'm replacing the apps With one from genos garage(I stuck a junky Amazon knock off on it to try to get me by, didn't work so don't waste your time) anyone think there's any thing to worry about with the lift pump circuit?  98.5 24v

It is best to let the ECM control the lift pump.

You can get your APPS from this site. 

 

 

Man, what is it with these ECMs all of a sudden......

4 minutes ago, gipperkid said:

Man, what is it with these ECMs all of a sudden......

They're approaching expiration date 

3 hours ago, gipperkid said:

Man, what is it with these ECMs all of a sudden......

Mine went 9 years ago. Found this site right after that.

Edited March 20, 20196 yr by dripley

Does the Fass have a relay in the wiring?  If not, I'd put one in.  The newer ones come with a wiring harness and relay, not sure about the older ones. 

My fass didn't come with one because it was one of the 1st fass they made. So I had to add one too