62 Ride height and Idle problems

[notatreehugger]

I've searched but can find the answer. What is the factory height on a 62 and where do you measure it? I measured mine between the front and rear doors, 68. 5 inches, but I don't know if this is good or bad. Second, I tried the unlit torch method to find the vacume leak in my 3F, but no luck, which should be a good thing, but now I have no idea why my ride idles at 1200 rpms. Any suggestions?

 

[JBBenson]

Either a vacuum leak or your thermostat is stuck/broken open, not letting it warm up properly and not dis-engaging the cold start injector.

Mine thermo was broken open, took 10 minutes to warm up and the idle never really slowed to where it should be.

 

[bigbertha]

or

adjust your throttle cables and throttle position sensor.

 

[notatreehugger]

Alright, after a long night of wrestling with all the junk around and on the thermostat housing, I got it changed. Thermo was stuck open, I didn't know what a heater was for until yesterday. No more cover-alls in the 62! I also adjusted the throttle cable. To no avail, still high idle woes. How exactly do I adjust the throttle position sensor? And I checked the idle air valve, seems to be operational, clicking on shut down.

 

[dallen341]

probably the coolant temp sensor going south. It will idle fast until coolant is hot. If the sensor is bad, the ECM never knows that the coolant is hot and will cause the truck to idle fast.

Don

BTW, it's a royal PIA to get to.