high idle???

[vhaines]

Driving my 93 tonight n got off the freeway n the idle was up way high prolly 1200 Rpms or so as i was downshifting. Rolled up to the light and after a min it would kick down to normal. Stopped n restarted didn't help. All wires n linkage looks normal. Just had injection pump completely rebuilt at southwest diesel technologies in phoenix. Is there something sticking? Any ideas?

 

[DVolk]

Im guessing a bad govornor shaft , or pump contaminants was the pump turned up ?

Im still fighting with the pump shop that did mine basicly they say too bad

 

[vhaines]

No as far as i know its stock. I haven't asked anyone on here about turning it up yet because of diesel prices going up. Does it hurt anything to drive it this way?

 

[vhaines]

How do i fix it? Is the governor shaft just something i can replace or do i gotta take the pump off? How do i troubleshoot to find out if that's definitely what it is?

 

[Mikey-KE7LBB]

Throttle cable frayed and sticking perhaps??? Happened to me once and i found that it was the cable frayed in the lining and holding it at a higher RPM than idle was set for. I think this was a common problem and a recall item or TSB on the 94-98 trucks.



Needless to say, but it was quite a shock at the time and glad I had a standard instead of an auto!!



Also check the cruise control linkage and cable to see if everything retracts to idle position next time this happens.

 

[DVolk]

The pump needs to come apart to fix the shaft it also cost $90 .

one spot you might check it make shure the fuel line is not catching the throttel lever on the pump , the other you might check is if the return spring didnt break