Discussion:
Cat / Mitsubishi with H21 - additional gas injector dont work

Hello. I have a problem with CAT GP20CN with H21 engine, same as in many different forklifts CAT, Mitsubishi and Nissan. Fuel = LPG, engine have full electronic with 2 injectors: main , and additional what must work when acceleration pedal going down.

In my machine this additional injector dont work and its still closed, engine intermit when accelerate becouse dont have enougth fuel. Injector (valve) is OK, work when we give +12V. It have 2 cables: white is mass, and green/yelow is signal from ECU. Cables to ECU are OK, but we dont have signal from ECU. Any fault codes. MAF sensor is replaced and still same. Acceleration pedal position sensor was check and it is OK too.

Where is a problem? What signal ECU need to open this valve?
  • Posted 19 Dec 2018 20:46
  • Modified 19 Dec 2018 20:51 by poster
  • By kor1
  • joined 19 Dec'18 - 8 messages
  • Poland

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Global Industry News
edition #1238 - 10 July 2025
This week Forkliftaction News is celebrating its 25th anniversary! A wonderful achievement given we launched at a time when just 6% of the world’s population were internet users, according to Internet World Stats . Over the coming weeks, we will be sharing stories about our history and rolling out more celebrations, so keep an eye out... Continue reading
Fact of the week
The dot-com bubble, a period of large and rapid investments in internet-based companies, peaked in 2000 and saw the Nasdaq Composite index rise by 579%. Then the bubble imploded. As the value of tech stocks plummeted, cash-strapped internet start-ups became worthless and collapsed.
JLG G12-55A
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
UN Forklift MINI5TON-DIESEL-FORKLIFT
HANGZHOU, Zhejiang, China
New - Sale