engine performance Issues,

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Jeff w Ashworth

Junior Member
Joined
Jun 2, 2021
Posts
22
Reaction score
1
Location
United States
First Name
Jeff
Truck Year
1984
Truck Model
GMC
Engine Size
350
I have a rebuilt short block 350 bored 30 over, have running issue feels like it is missing checked everything out new plugs, rebuilt carburetor, adjusted lifters, feels like it misses all through gears up to speed limit, step down on it and acts like coughing and poping through exhaust.
 

TotalyHucked

Full Access Member
Joined
Feb 24, 2020
Posts
3,671
Reaction score
11,863
Location
Auburn, Georgia
First Name
Zach
Truck Year
1985
Truck Model
Sierra 1500
Engine Size
5.3
Have you checked the timing? And made sure the advance is working correctly?
 

Catbox

Full Access Member
Joined
Jul 12, 2018
Posts
4,452
Reaction score
16,684
Location
Just Outside of Portland Oregon
First Name
Peter
Truck Year
1979
Truck Model
C20 Silverado Camper Special
Engine Size
461
I would look at the timing events as well.
Distributor could be a tooth off?
 

fast 99

Full Access Member
Joined
Dec 31, 2021
Posts
2,029
Reaction score
2,938
Location
Spokane, Washington
First Name
Brian
Truck Year
81,85
Truck Model
K20
Engine Size
350
Yes, go back and double check tune-up, especially firing order. Exhaust leak can cause popping into exhaust, but you said it runs poor. Could be a valve problem, bad distributor cap, vacuum leak, base tune up, ect. Check vacuum is it steady? What is the reading?
 

Ricko1966

Full Access Member
Joined
Apr 11, 2017
Posts
5,452
Reaction score
8,704
Location
kansas
First Name
Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
What is compression in all 8 holes?
 

Forum statistics

Threads
44,173
Posts
950,868
Members
36,288
Latest member
brentjo
Top