Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

6.2 high idle switch

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Old Jan 28, 2012 | 06:03 AM
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Default 6.2 high idle switch

Is it possible to create a high idle switch for a 6.2? If so, how would I do it?
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Old Jan 28, 2012 | 06:30 AM
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There should be a high idle solenoid mounted next to the injection pump, around the throttle cable. You'll know it when you see it. With a continuity tester, find out which wire is ground, this will tell you that the other is positive. Tap into that wire, then run a new piece to the switch, then come off a switched part on the fuse panel for supply. When you flip the switch, may have to push the accelerator pedal down. If nothing happens, you may have a faulty solenoid.
 
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Old Jan 28, 2012 | 10:16 AM
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Originally Posted by wildbill
There should be a high idle solenoid mounted next to the injection pump, around the throttle cable. You'll know it when you see it. With a continuity tester, find out which wire is ground, this will tell you that the other is positive. Tap into that wire, then run a new piece to the switch, then come off a switched part on the fuse panel for supply. When you flip the switch, may have to push the accelerator pedal down. If nothing happens, you may have a faulty solenoid.
X2 on that
 
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Old Mar 10, 2012 | 06:32 PM
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I hear the solenoid 'click' but nothing moves. Faulty solenoid?
 
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Old Mar 10, 2012 | 07:06 PM
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This is what your looking for. It'll have just one terminal, so 12v + to kick it in.
 
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Old Mar 10, 2012 | 07:08 PM
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Yup, that's the one, I put 12 v direct to it, and it clicks but doesn't move, even without the accelerator against it, I figured it would 'pop' out without the resistance against it. I thought maybe this meant the solenoid was bad?
 
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Old Mar 10, 2012 | 07:14 PM
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Usually if nothing happens its bad. Never had one click and not pop out.

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Old Mar 10, 2012 | 07:16 PM
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I thought it was kinda weird too. Hate to buy one and have the same problem tho, $100+ solenoid from that I can find.
 
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Old Mar 10, 2012 | 07:20 PM
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I had a line on a few of em, but the guy hauled off all his engines for scrap. If you got a wrecking yard near by, might be able to get one of a 5.7 or another 6.2
 
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Old Mar 10, 2012 | 07:23 PM
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That's what I figure, the 5.7 is the same? Gas engine?
 
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