Hi guys, pardon my english, I am from Norway.
I did a compression check today.
The engine (as far as I know):
Stock 350 with the original Rochester Quadrajet carb, no modifications.
The truck:
1976 C20 Silverado with a TH350.
It was stored outside in the norwegian winter, it was around -17C at the coldest. A buddy of mine started it up and let it idle till it got warm 3-4 times during the winter.
In springtime I drove it 260 miles without problems. After that I drove it around town for a couple of days and noticed a vibration while accelerating. It has some uneveness/shaking while in P and some throttle, maybe 1200-1600 rpm.
I got the following results:
Sylinder 1: 137psi
Sylinder 2: 150 psi
Sylinder 3: 137 psi
Sylinder 4: 150 psi
Sylinder 5: 135 psi
Sylinder 6: 140 psi
Sylinder 7: 138 psi
Sylinder 8: 150 psi
The lowest was 135 psi and the highest was 150 psi.
Are the compression OK? Whats the next thing for me to check out/do? I changed the fuel filter without effect.
Thanks for tips and answers!
