Jawzjeep
Honk if parts fall off
- Joined
- Jun 5, 2021
- Posts
- 476
- Reaction score
- 943
- Location
- Washington
- First Name
- Joshua
- Truck Year
- 1991
- Truck Model
- Suburban
- Engine Size
- 350
I have. Not running it held vacuum. I also activated with a mighty vac while at idle and the engine fell on its face. I was for sure it was opening it at idle causing it to have a vac leak. Symptoms seemed to match. Did have to replace the EGR solenoid a while ago because it tested bad.Have you checked egr valve?
I replaced my CTS already and the last check showed values were correct. I had the same issue as you at one point , the CTS splice came loose and its been repaired. While troubleshooting this time I unplugged the CTS and it immediately ran like poop.
I pulled all the vac lines and tested them individually to see if they held vacuum and the ones that didn't pass already get replaced. Except I didn't remove to test the brake booster one.if the code 34 is intermittent, check the vacuum lines again and wiggle the harness around and see if you can get it to throw the code again. take the sensor out of the bracket and move/twist it to manipulate the harness.
Man I tell you what, I wiggled and jiggled the hell out of that map connector when I was back probing it and switching from one map sensor to another.
Top end cleaner or fuel treatment cant hurt.
Probably could use it since it hasnt driven much.
Thanks