1. Home
  2. Forums
  3. Technical Troubleshooting

Doosan (& Daewoo) GC33E-5:
Hesitation & backfiring.

Trying to troubleshoot with no fault code list. Truck has Woodward LPG mixer & regulator.
Was told plugs & coils were already replaced. Also some vacuum hoses to regulator.
Used pedal to retrieve faults 933 & 721.
Cleared faults.
Checked vacuum hoses & made sure orifices were clear.Removed map sensor (sensor in inlet manifold).
Don't know what 2 valves behind fuel regulator are or what functions they serve.
Check engine light came back on this time has a 751 fault.
Anyone know what I should look for next?
  • Posted 14 Aug 2020 22:47
  • Discussion started by timbob
  • Pennsylvania, United States
Post a ReplyReport this post

Post your Reply

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Having trouble using the Discussion Forums? Contact us for help.

Your Focus
Stuart Taylor
The critical role of managers in MH safety
Stuart Taylor
Read blog
From the forum discussions …
"Remove the coils and ohm out the pins. Coils take a different number than regular 4y plugs... If code is there then it is an ecu issue."
ron_k, United States
Read & Post in our Forums
Movers & Shakers
Linda Häkkilä Linda Häkkilä
Linda Häkkilä
vice president, Investor Relations, Konecranes
Rhiannon Stone
vice president operations, Elokon Group
Bennit Schmieder
President, EP Equipment Europe
Mathias Höglund
Senior vice president human resources, Kalmar
Last Week's Most Read
edition #1227 - 24 April 2025
Hangcha CBD15
Hangcha CBD15 2021
China
Used - Sale
USD1,600
JLG G9-43A
JLG G9-43A 2007
Flesherton, Ontario, Canada
Used - Sale
|

PREMIUM business

Cascade Corporation (World HQ)
Leading manufacturers of attachments, forks and related technologies for forklifts and AGVs.
Cascade Corporation (World HQ)
Movers & Shakers
Linda Häkkilä Linda Häkkilä
Linda Häkkilä
vice president, Investor Relations, Konecranes
Rhiannon Stone
vice president operations, Elokon Group
Bennit Schmieder
President, EP Equipment Europe
Mathias Höglund
Senior vice president human resources, Kalmar
Upcoming industry events …
LOGMAT
May 09-11, 2025 - Bangalore, India
TOC Americas 2025
October 21-23, 2025 - Panama City, Panama
The Battery Show Asia
July 15-17, 2025 - Hong Kong, Hong Kong
More Events
From the forum discussions …
"JLG 2630ES:...These lifts pots can be a hassle...if you replaced them..make sure you changed wiring..they come set normally open..."
Matthew_Reed, United States
Read & Post in our Forums
Upcoming in the editorial calendar
ARTIFICAL INTELLIGENCE
May 2025
Ask us about editorial contribution