1984 Chevy k20
Junior Member
- Joined
- Sep 3, 2024
- Posts
- 12
- Reaction score
- 13
- Location
- Utah
- First Name
- Wyatt
- Truck Year
- 1984
- Truck Model
- K20
- Engine Size
- 5.7L
I know it’s a numbers matching block with the truck, which doesn’t help anything, just cool
Trucks running werid
- Thread starter 1984 Chevy k20
- Start date
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1984 Chevy k20
Junior Member
- Joined
- Sep 3, 2024
- Posts
- 12
- Reaction score
- 13
- Location
- Utah
- First Name
- Wyatt
- Truck Year
- 1984
- Truck Model
- K20
- Engine Size
- 5.7L
Sorry about that
squaredeal91
Full Access Member
- Joined
- Mar 10, 2023
- Posts
- 2,534
- Reaction score
- 4,583
- Location
- Cave junction Oregon
- First Name
- Greg bush
- Truck Year
- 1991 SB
- Truck Model
- K30
- Engine Size
- 5.9 Cummins 12 valve
Side story lol, Interesting you mentioned low compression 350.
I once worked on a 78 c50 and the engine cranking over sounded dead like no compression and would spin over with the starter like plugs were removed but it always started and ran good lol.
Jgonick
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- Jan 12, 2017
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- 297
- Reaction score
- 377
- Location
- West Texas
- First Name
- Joel
- Truck Year
- 1985
- Truck Model
- K10
- Engine Size
- 350
Removed-
Already mentioned above. -sorry
Already mentioned above. -sorry
Last edited:
peats
Full Access Member
- Joined
- Dec 2, 2016
- Posts
- 305
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- 260
- Location
- Pennsylvania
- First Name
- john
- Truck Year
- 72k5, 81c10 short step, 83k10 short fleet, 03 SSR. 25 chevy doodlebug
- Truck Model
- k5 c10 k10 SSR doodlebug
- Engine Size
- 406 360 6.2 5.3 171
You might have a worn out camshaft. I lost a cam once. Didn't make noise, just was really down on power.
squaredeal91
Full Access Member
- Joined
- Mar 10, 2023
- Posts
- 2,534
- Reaction score
- 4,583
- Location
- Cave junction Oregon
- First Name
- Greg bush
- Truck Year
- 1991 SB
- Truck Model
- K30
- Engine Size
- 5.9 Cummins 12 valve
On my first truck had 350 in it when i was 14. it would pop through intake I think. when you stabbed the throttle to make it (go now!) It would always cough. I messed with timing and carb but couldn't make it go away. My dad suggested bad cam? He was right. 3 or 4 barely had anything left to open valves.
haxored
Junior Member
- Joined
- Oct 25, 2018
- Posts
- 17
- Reaction score
- 90
- Location
- California
- First Name
- Joe
- Truck Year
- 1974
- Truck Model
- C10
- Engine Size
- 454
Went through something real similar recently with my son's 350/350 '74 elco..
Same type of issue, it only surfaced when the engine was warm and at a certain rpm range. He was convinced it was bad gas, even though it had been going on for a few tanks worth, but it would run fine cold, and 75-80% of the time.
Ended up being a plug wire with a pinhole (near the plug boot) we didn't even think to check them due to then being less than 6 mo's old and a better quality brand/set, just happened to see it arc while troubleshooting into the evening. New set of wires, swapped just one out, problem solved! (He did go back and swap them all out the next day when he had more time.)
Same type of issue, it only surfaced when the engine was warm and at a certain rpm range. He was convinced it was bad gas, even though it had been going on for a few tanks worth, but it would run fine cold, and 75-80% of the time.
Ended up being a plug wire with a pinhole (near the plug boot) we didn't even think to check them due to then being less than 6 mo's old and a better quality brand/set, just happened to see it arc while troubleshooting into the evening. New set of wires, swapped just one out, problem solved! (He did go back and swap them all out the next day when he had more time.)
boblee09
Junior Member
- Joined
- Feb 25, 2024
- Posts
- 6
- Reaction score
- 9
- Location
- NC
- First Name
- Eric
- Truck Year
- 1984
- Truck Model
- C10
- Engine Size
- 5.0
I have an 84 c10 305. Mine had the same issue. There was a vacuum line T fitting on the motor near the firewall. It had broke. Can’t remember if I plugged it or replaced it. Anyway it runs great now.
