I just adjusted the timing on my truck listed above it is a 5.7 liter. My truck was getting horrible gas mileage and I had already done everything else (i.E. Replaced every sensor). The timing was set at around ten degrees so I set it at zero (or about as close as I could get it to zero.) This was a pain as every time I tried to tighten that distributor bolt it adjusted the timing slightly. Anyways. When I got the bolt sufficiently tight I checked the timing one last time and then turned the truck off and reconnected the black-tan wire under the firewall (ECT or something?) I drove it around for a bit and rechecked the timing when I got back. I left the black-tan wire plugged in and noticed that my timing was way advanced (probably around sixteen degrees) and fluctuating slightly as the rpm's went up and down while idling (this is one of the annoying things I have been trying to fix). So I unplugged the wire and started to re-do the timing adjustment. Well after I unplugged that wire the timing was back to zero degrees.
So what the heck? When the wire is not plugged in the timing is at zero. When the wire is plugged in the timing reads around sixteen. Should I leave the wire unplugged? Or is it normal for the timing to jump back up when you plug the wire back in?
have the same problem?
Sunday, March 27th, 2011 AT 11:07 PM