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

RPM drop to 500 while driving

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Old Oct 2, 2015 | 06:16 AM
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Default RPM drop to 500 while driving

hey guys new to the forum.

i have a 97 tahoe that runs fine but randomly the rpms just drop off to 500 while driving for a second then back to normal. Does this randomly. its only shut off on me once while i pulled into my drivway but started rite back up. any ideas?

new parts consist of- injection pump, injectors, fuel lines, filter, tank, sending unit and lift pump
 
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Old Oct 2, 2015 | 12:09 PM
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Originally Posted by Detroit Tahoe
hey guys new to the forum.

i have a 97 tahoe that runs fine but randomly the rpms just drop off to 500 while driving for a second then back to normal. Does this randomly. its only shut off on me once while i pulled into my drivway but started rite back up. any ideas?

new parts consist of- injection pump, injectors, fuel lines, filter, tank, sending unit and lift pump
Check the grounds especially the one on the rear of the passenger side head.
 
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Old Oct 3, 2015 | 08:35 PM
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Originally Posted by Mayhem
Check the grounds especially the one on the rear of the passenger side head.
Checked all grounds and their all good
 
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Old Oct 5, 2015 | 04:57 PM
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Originally Posted by Detroit Tahoe
hey guys new to the forum.

i have a 97 tahoe that runs fine but randomly the rpms just drop off to 500 while driving for a second then back to normal. Does this randomly. its only shut off on me once while i pulled into my drivway but started rite back up. any ideas?

new parts consist of- injection pump, injectors, fuel lines, filter, tank, sending unit and lift pump
Do you have a spare PMD? is it relocated, if not you should get one.
 
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Old Oct 5, 2015 | 05:17 PM
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Originally Posted by Mayhem
Do you have a spare PMD? is it relocated, if not you should get one.
The pmd is relocated to the front bumper and I tried my spare with no difference
 
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