BigTex-SKO
New Member
- Joined
- Feb 19, 2024
- Posts
- 9
Hello from a brand new Skoolie! I need help and advice please.
I just bought a 1990 GMC 6000 6.0L 366 CID V8 automatic Ward Volunteer SS-31. Friends of mine drove it to their backyard in 2020 to use as a Covid classroom for their kids and the neighbor’s kids. It started right up after 4 years of sitting.
The bus started in neutral but the gas pedal didn’t rev the engine. I could move the shifter into reverse or forward and the bus would clunk like it wanted to move, but no gas pedal power. The pedal cable moves the cam on the carburetor/injection thing but no revving.
Now, a week later with no tinkering, it won’t go into neutral anymore and is stuck in PB. Starts in PB but shifter stick won’t move.
Conditions:
Plates in carb/injector open manually when engine off but stay shut when opened by hand with engine running. What’s up with that?!
Air brakes pressures up past 60 and on to 120.
Buzzer is sounding next to driver and back door. Checked continuity. Wire 5(back door and barrel bolt) and wire 57(roof hatches) are continuous. Wire 14(push out windows) is an open circuit.
All fluids are new and full. Bus serviced in 2020.
Questions:
What caused shifter to suddenly lock up?
Is the gas pedal tied to the brakes or something?
Wiring diagrams from a later model seem to show the buzzers are just noisemakers. Not sure. Sign inside bus mentions rear and side door starter interlock but bus starts so that might not be an issue.
I’m getting frustrated. Must be something simple. Help!
See photos.
If you happen to live near Austin, Texas I’ll gladly pay you to come troubleshoot it with me!
Thank you,
Brian in Austin
I just bought a 1990 GMC 6000 6.0L 366 CID V8 automatic Ward Volunteer SS-31. Friends of mine drove it to their backyard in 2020 to use as a Covid classroom for their kids and the neighbor’s kids. It started right up after 4 years of sitting.
The bus started in neutral but the gas pedal didn’t rev the engine. I could move the shifter into reverse or forward and the bus would clunk like it wanted to move, but no gas pedal power. The pedal cable moves the cam on the carburetor/injection thing but no revving.
Now, a week later with no tinkering, it won’t go into neutral anymore and is stuck in PB. Starts in PB but shifter stick won’t move.
Conditions:
Plates in carb/injector open manually when engine off but stay shut when opened by hand with engine running. What’s up with that?!
Air brakes pressures up past 60 and on to 120.
Buzzer is sounding next to driver and back door. Checked continuity. Wire 5(back door and barrel bolt) and wire 57(roof hatches) are continuous. Wire 14(push out windows) is an open circuit.
All fluids are new and full. Bus serviced in 2020.
Questions:
What caused shifter to suddenly lock up?
Is the gas pedal tied to the brakes or something?
Wiring diagrams from a later model seem to show the buzzers are just noisemakers. Not sure. Sign inside bus mentions rear and side door starter interlock but bus starts so that might not be an issue.
I’m getting frustrated. Must be something simple. Help!
See photos.
If you happen to live near Austin, Texas I’ll gladly pay you to come troubleshoot it with me!
Thank you,
Brian in Austin