OK. My 91 3.0 was running pretty good, but had a definite "burning oil" smell coming from the engine. I found that the passenger side valve cover was leaking at the rear of the engine, so I took the plenum off and replaced the valve cover gaskets/upper intake gasket. I broke the connectors on all of the injectors on the passenger side, so I soldered on replacement pigtails. I reassembled everything and I think I got it right, but on first startup I found I had forgotten to reattach a small coolant hose just rear of the throttle body and that sprayed coolant into the little valleys of the intake and then it started smoking like a beeyotch. I took care of that and then restarted the truck.
Current situation: The truck is harder to start cold then it used to be. It starts, then goes to about 800 rpm, which should be the hot idle. I can rev it and sometimes it goes to 1100 or so cold. Then it drops down to 5-600 rpm and no amount of turning the idle adjustment screw will increase the idle. I realize I lost a little coolant, so I added some to the overflow tank but the level of the tank never changes. The idle seems to go lower and lower as the truck gets hot. By the exhaust I hear it sputter occassionally, but I assume that is a symptom of the low idle.
At this point my thought is to remove the throttle body and clean it out. I has a ton of build up past the butterfly valve. Does this seem to be a reasonable solution?
Posted: Mon Sep 30, 2013 6:26 am
Joined: 07 Aug 2013
Location: Harrisburg, NC
Fixed. Throttle body cleaned and cooling system burped.
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