gregnash
Anal Retentive Analyst
So I confirmed last night that my ECM is dead (did short jumper wires and reconnected the ICS like normal). I had grounded the ICS to the carb body (Green Wire mod) and the truck runs fine but after doing some further reading from JimC it appears while this is a fix, it really is not one but more of a bypass.
From the reading I have done, while grounding the ICS allows it to function it does not FULLY function like it should. My understanding is that the ICS performs multiple duties between the ECM and Vac that it sees during normal operation. It basically becomes a meter of the amount of fuel that is let into the carb based on reading from the computer and vacuum from the fuel cut switch.
From what Jim has said in other posts basically once you do the Green Wire mod and ground the ICS to the carb body it keeps it in basically an open state anytime it is energized. This is not necessarily great for the engine because it causes excess fuel usage and thus that fuel has to go somewhere (like the cylinders, out the exhaust, in the cat and out the tailpipe, destroying everything slowly as it does).
So with that said, before I drop $50 on a used and supposedly good ECM for BeBe, is there a way to test mine to see that it is truly the culprit and I do not have a break in the grounding wire somewhere. I am not an electrical person so this will have to be dumbed down for me.
I will pull FSMs when I get home but at work I cannot pull up dropbox or any other such site (web security).
From the reading I have done, while grounding the ICS allows it to function it does not FULLY function like it should. My understanding is that the ICS performs multiple duties between the ECM and Vac that it sees during normal operation. It basically becomes a meter of the amount of fuel that is let into the carb based on reading from the computer and vacuum from the fuel cut switch.
From what Jim has said in other posts basically once you do the Green Wire mod and ground the ICS to the carb body it keeps it in basically an open state anytime it is energized. This is not necessarily great for the engine because it causes excess fuel usage and thus that fuel has to go somewhere (like the cylinders, out the exhaust, in the cat and out the tailpipe, destroying everything slowly as it does).
So with that said, before I drop $50 on a used and supposedly good ECM for BeBe, is there a way to test mine to see that it is truly the culprit and I do not have a break in the grounding wire somewhere. I am not an electrical person so this will have to be dumbed down for me.
I will pull FSMs when I get home but at work I cannot pull up dropbox or any other such site (web security).