Oh, one more thing. What do the spark plugs look like?
Doug Fedeli
Kyle Kozubal wrote:
> > OK...next question on this...(Been thinking about it some more)
> >
> > Let's go back to the basics for a second: He's replaced the sensors, IAC,
> > had a tech scan the computer (analyze it), changed fuel pump and sock, and
> > it still dies at idle. Has anyone checked the preset screw on the TB yet?
> > I know that the IAC controls the idle...but if the blades are too far
> > closed...it will stall. (Found that one out the hard way...was playing
> > around with the screw a long time ago.)
>
> True Bernd, and I actually looked the 'idle adjustment' screw on the spring
> plate, which basically acted like a door stopper and allows the throttle
> blades to spring back and close the bores, just enough to keep idle down and
> let the truck get enough air flow to keep running. I really though about
> this, but couldnt justify messing with it/adjusting the blades open more at
> idle, since I have never messed with this adjustment screw. The one thing
> that still gets me though, my truck has been idling higher than normal since
> all this started. It always idles and 650-700rpms, and throughout this
> ordeal, the truck has idled at 900rpms-sometimes even 1000rpms. When the
> truck dies is when the rpms actually drop back down to the 700 range, then
> it cuts out and dies. Thankfully it restarts. Like I said though, it has ran
> great the last two days. Is there a given factory spec. measurement on how
> far in/out the adjustment screw should be at.......other than saying the
> truck is supposed to idle at 600-650rpms. I mean I could open/close and keep
> playing with this adjustment screw, but I dont want to screw anything up
> more if there is no need to mess with the screw. Oddly enough also, the
> truck runs considerably worse when the MSD ignition is unplugged and the
> stock ignition is put back to work. getting strange isnt it?
> Kyle
> 93 Dakota 4x4 V6
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