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P0300 and P0302 With new long block 1996 K3500 5.7l

I have been having a lot of problems with my 1996 K3500 5.7l The truck has about 220K miles on it. I recently had problems with it running very rough. I found out I had low compression on two cylinders, So I decided to get a new Long Block. I replaced a lot of other parts with it. -Blackbear...
- Jbarry14
- Thread
- Oct 2, 2023
- 1996 5.7 5.7l vortec k3500 misifre p0300 p0302
- Replies: 3
- Forum: Engine Performance + Maintenance
So. Many. Codes. **Solved**

Alright, here we go..... **Edit #2 - Solved** So, I got to reading and read a post that reminded me of something. Keep it simple stupid....... I went back under the hood with a spot flashlight and started looking around. I immediately found a vacuum line (one of the small, like 1/4" hard...
- 96CK
- Thread
- Sep 1, 2023
- p0102 p0122 p0175 p0300 p1122 p1153 p1351
- Replies: 4
- Forum: Engine Performance + Maintenance
Request help: L31 5.7 Cylinder 5 Misfire

Looking for help with ideas to diagnose and fix my 1998 Chevy K1500 5.7L L31 misfire. The situation and actions I have taken to date appeaser below. Any thoughts on where to go next would be appreciated. Symptom - Cylinder 5 misfire at all engine speeds - P0300 DTC; no other DTCs. Diagnosed...
- George Schreffler
- Thread
- Dec 3, 2022
- cylinder 5 l31 misfire p0300
- Replies: 27
- Forum: Engine Performance + Maintenance
S
P0300 1996 K1500

I just bought a truck with a random cylinder misfire. Little back story on the truck, it was this guys brothers who passed away, he parked the truck and it sat for over a year. I went to look at it wouldn't start, i noticed a spark noise which i then saw coming off the distributer was chewed...
- Sterek
- Thread
- Jan 19, 2020
- p0300
- Replies: 28
- Forum: Engine Performance + Maintenance