High Idle at Start-up - '94 80

[TroutBear]

I get, what's to me at least, high idle rpms at a cold start - first thing in the morning, after work. 1600 - 1800 rpm, dropping to ~1000 rpm when gear selected. This high run condition continues for a short while, then drops to a more "normal" 700 - 800 rpm idle - doesn't reappear after the truck is warmed up, shutdown and restarted. This seems like the worst possible thing from an engine lub perspective. I can understand a warm-up cycle, but is this out of the ordinary - and what's a possible driver for it? yes, this is new aquisition and our first Cruiser, so no good reference on the issue here.

 

[DuManchu]

Sounds normal to me. Mine does the exact same thing, I usually wait for it to warm up and drop RPM's a bit before putting it in gear though.

 

[Driley]

Same here...

My 94 LC does the same thing. Runs at about 1,500 to 1,600 rpms for a little while, then calms down to ~1,000 rpms. Once warm, idles at ~600 rpms in gear, slightly higher in park.

 

[Doc]

Yeppers, perfectly normal.

 

[Razorshock]

My A/C light doesn't work anymore, so once and awhile I'll leave it on by mistake and get a higher idle.