I'm stumped on 350 tbi motor

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Chevrolet - 20 Dec 2006 23:33 GMT

Motor ran awesome or so I was told before it was puled.. I can't get the
damn thing to stop the slight rough idle.. It runs fine and smooth then gets
a slight miss to it.. I've changed every sensor, tried timing it and still
no luck ALSO I can get the fdamn thing to time to 0 with tan wire unplugged
or it chugs then stalls.. If I leave it around 4-6 it seems to work great..
minor miss no and then, but as soon as shut the truck off, and plug the tan
wire in, it runs good for 1 min then back to missing slightly and acting
weird Any advice ?... thanx

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Chevrolet - 22 Dec 2006 00:48 GMT

since i got no tips.. I did some research which took a day surfing.. The 350
tbi motor in my truck had a cam put in it when rebuilt so the 305 tbi ecm
couldn't handle it So I found a used 350 ecm and plugged it in and what a
difference !! like night and day. Now they are saying I have to change the
ESC from 305 to 350 and knock sensor..oh well.. at least it runs beter

> Motor ran awesome or so I was told before it was puled.. I can't get the
> damn thing to stop the slight rough idle.. It runs fine and smooth then
[quoted text clipped - 4 lines]
> and plug the tan wire in, it runs good for 1 min then back to missing
> slightly and acting weird Any advice ?... thanx

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