High Idle Question? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: High Idle Question?


steiner43511
02-24-2005, 07:54 PM
sometimes when it is cold, my high idle doesnt work right. it will rev up than back down and so on till i shut it off. has anybody else experience this problem?

Firefighter
02-25-2005, 11:22 AM
Sounds to me like a ground problem. Did you check the place where the switch is grounded?

steiner43511
02-25-2005, 01:15 PM
yeah it is a ground that i use for a hitch light and my cb and my pyro lighting and those work ok when it is cold.

Firefighter
02-25-2005, 02:07 PM
Check the connection at the switch, the wire itself for a possible break under the covering (would contract and open up in cold weather), check and clean the pins at the computer, or maybe even replace the switch itself. If all else fails, could be a bad solder at the pin on the computer that opens when cold.

steiner43511
03-12-2005, 07:57 PM
today when i flipped the switch on, i noticed the speedometer would go up to ten and then back down and then back up, etc. when it got up to ten it would hesitate and when it dropped back down it would be fine.

steiner43511
03-12-2005, 07:58 PM
today when i flipped the switch on, i noticed the speedometer would go up to ten and then back down and then back up, etc. when it got up to ten it would hesitate and when it dropped back down it would be fine.

when i flipped the switch off it dropped to zero and was fine.