code 21 ect out of range

[Sicktight722]

Hey, I ran codes today and I let the engine idle for about 2 minutes towarm up a little but it was already pretty warm outside. Anyway I got a code 21 which is a ect out of range. would the engine not being warmed up all the way throw this code? I'm also having a problem that when I crank the truck up I get high idle and high rpms. when I press the clutch in the rpms shoot up about a grand or more and stay there. After a couple of miles if I come to a stop the truck will idle down to where it is suppose to be and be fine untill I turn it off again. Would the ect cause this?

guess I should mention: 90 Bronco II, 2.9L Manual tranny 4x4.

 

[IMenriched]

Hey, I ran codes today and I let the engine idle for about 2 minutes towarm up a little but it was already pretty warm outside. Anyway I got a code 21 which is a ect out of range. would the engine not being warmed up all the way throw this code? I'm also having a problem that when I crank the truck up I get high idle and high rpms. when I press the clutch in the rpms shoot up about a grand or more and stay there. After a couple of miles if I come to a stop the truck will idle down to where it is suppose to be and be fine untill I turn it off again. Would the ect cause this?

guess I should mention: 90 Bronco II, 2.9L Manual tranny 4x4.

the code test or getting codes, should be done with a fully warm engine. or it could throw a false code.

clear codes, then take it for a short drive at least 5-6 miles... 10-12 is better, then recheck codes

 

[Sicktight722]

thank you, I'll do that first thing tomorrow