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Old 02-21-2018, 03:23 PM   #1
Adam j
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6.2 problems

I have a 6.2 in a 85 chevy k30 that is not running right when it warms up it has no power on top end and acts like it's not getting enough fuel and a lot of blue smoke
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Old 02-21-2018, 04:09 PM   #2
Edahall
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Re: 6.2 problems

Make sure your fuel filter is not clogged.
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Old 02-21-2018, 04:29 PM   #3
Adam j
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Quote:
Originally Posted by Edahall View Post
Make sure your fuel filter is not clogged.
I put a new filter and fuel pump on it
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Old 02-21-2018, 04:42 PM   #4
DieselSJ
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Re: 6.2 problems

There are a number of things that can cause that. Have you checked pump timing?
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Old 02-21-2018, 06:27 PM   #5
Eyegore
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Re: 6.2 problems

Watch this YouTube video, I believe he had the same issues you are having w/ the 6.2 its either this one or the next.

https://www.youtube.com/watch?v=TSU2lvRWeYw
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Old 02-21-2018, 07:35 PM   #6
Adam j
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The truck is running it's just has no power when you give it a lot of fuel it dies and then it doesn't even want to idle right but if you shut it off it will crank back and idle fine until you give it a lot of fuel again
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Old 02-21-2018, 08:05 PM   #7
Adam j
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The truck is running it's just has no power when you give it a lot of fuel it dies and then it doesn't even want to idle right but if you shut it off it will crank back and idle fine until you give it a lot of fuel again
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Now it will idle fine and have power then all at once it has almost no pedal and when you take your foot of the pedal it shuts off and then will crank right back up and idle good again until you give it a lot of fuel
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Old 02-21-2018, 08:22 PM   #8
Edahall
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Re: 6.2 problems

You may have an injection pump going out.
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1990 ton 4x4 Chevy Suburban
-Cummins Diesel - 12 valve - factory rebuilt
-6 speed bullet proof manual transmission - NV5600
-Gear Vendors Overdrive - HX35 Holset Turbo
-NP205 iron transfer case
-3.73 gears -2" Lift
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Old 02-21-2018, 08:57 PM   #9
Adam j
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You may have an injection pump going out.
Would it be acting like that going from good to bad back and forth
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Old 02-22-2018, 06:42 AM   #10
GM72K10
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Re: 6.2 problems

Pick up sock in fuel tank could be clogged. Especially if truck had been sitting for a while.
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