After the engine was at normal operating temperature, turn off the truck for 60 seconds. This is to let the idle motor adjust for higher rpm when starting. After it has been off for the idle motor to adjust, remove the connector to the idle motor and the coolant temp sensor. When you start back up the idle will be very high. According to my book it should be between 2400 to 2600 rpm. There is a bolt that that comes out of the idle motor that will need to be adjusted. My truck actually idled at about 3400. I had to turn the bolt clockwise to lower the idle. After I adjusted to 2500rpm, turned the truck off and reattached both the idle motor and coolant temp sensor connectors. The truck now idles very well. I used to have trouble when starting my truck that the idle would go up to aroung 3400 rpm and stay ther for an extended amount of time. It would go down but was putting pressure on the transmission when putting into gear. Hope this helps.
Veteran
where is the idle motor and which one of the coolent temp sensors, my truck idles real low around 400 and even 200 rpm
Rookie
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now that is interesting and good info. so with no vacuum at the regulator, the fuel pressure would be less than required, or more? (sorry, brain dead here this AM)Originally Posted by olddakota89
Earlier I posted that I had checked vacuum and it was good everywhere except the EGR valve. I did not have vacuum at the fuel pressure regulator but did not put that in the post since I got bad information from the dealer regarding vacuum at the fuel pressure regulator. I took the truck in to the shop and guess what they told me, no vacuum at the fuel pressure regulator. They pulled vacuum from another source. The truck no longer died or ran really bad in cold weather but something else was amiss. It ran rough and idled high. I took throttle body off of truck last weekend and bought a rebuild kit. Cleaned all vacuum ports with throttlebody cleaner. While the throttle body was off decided to replace vacuum hoses, much easier with it off. Put throttle body back on and used the original port for the fuel pressure regulator. Truck is no longer missing, but still idles high. Found prcedure for idle adjustment in my book and set the idle to the correct rpm. The truck runs like new. I have now driven it the last week, even in cold early morning weather and it has been running great.
