It appears I have fixed these issues and is running perfectly now!! Only thing I have to hook up still is vss as the loom goes straight from ECU to vss but I am unsure if they have the same signal...

I hear what you are saying, it is a difficult situation . earth's are all good I have 5 of them , some direct to battery some to body, harness earth's are connected to these aswell. Both my ecm s are...

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I seem to have fixed the surge that is not happening now . main issues now are information on scan tool is all backwards and wrong, and idle will not go below 1000 rpm, IAC won't let it. I have a...

Been through all the wiring all looks good . where does the vss wiring go to? as I'm not running a instrument cluster, and still getting 250 mph in park. Also my map vaccum is backwards is 25 inhg...

Hi I never removed any of the chips from ecm .
My harness goes from behind engine to bellhousing area , tranz wires go back and engine wires go forward . I pretty confident none are near any...

I don't think it has vssb I haven't seen one or anything about one. It is getting a signal to ecm its just 250 mph ish in park but unplug it and goes to 0 .

Yep the standard one out of original pickup using pickup transmission aswell , so nothing has been changed.

So quick update . plugged scan tool in to see if it was any better , it is not . still only code 34 but values are strange like in park at idle says its doing 250 mph , map is like 8inches VAC at .84...

Hi yes I find it strange that wire was missing aswell. According to all the paperwork it is the correct loom. So I went through all the pinouts the other day and the crank signal was the only one...

Thanks Dave yes very strange , I was thinking wiring too I just can't seem to find anything wrong. Wiring did not have schematic just instructions, was all labeled and and quite easy . only wire I...

Hi I have a 88 GMC 5.7 TBI that was running great . I pulled it out and put it in my Chevy van , using a swap loom and a all new fuel system . ever since I started it up it surges at idle and has a...

Hi there I have a 88 GMC 5.7 TBI that was running great I took it out and put it in my Chevy van , since I fired it up it has had this surge and misfire. I used a new swap loom and new fuel system ....