Hyundai 30L-7M:
No start, excess fuel

Hey guys I have a Hyundai 30L-7M with a no start condition. It will fire on brake clean. I replaced the regulator due to a ton of fuel pressure coming from the regulator to the epr. Still will not start. The diaphragm in the mixer is in good shape with no tears or no Gunk.

I jumped pins one and four in the diagnostic port to get flash codes. It has a bunch of codes. They are 6420, 1173, 1644, 2123, 1626, 6530, 1611.

Any help would be much appreciated as I cannot find the description of these fault codes anywhere. Thanks!
  • Posted 4 Mar 2025 08:18
  • Discussion started by Michael_Brown
  • Ohio, United States
Showing items 1 - 3 of 3 results.
Hi dear friend
How are you
Im afshin.

I currently have a dual-fuel Hyundai forklift 25G-7M with PSI engine.

Problem:
when I turn on the engine, acceleration doesn't any work!
Just engine run on 700 Rpm.

I try to get code with flash mil light but have many error code appears.

I wanted to get some advice from you on what could be the reasons why the gas pedal stops working.

By the way, this only happens on gasoline fuel and the device is Ok on LPG gas fuel.

I replace Fuel pump.
Injectors.fuel filter.
What do you think about this problem?
  • Posted 25 Apr 2025 03:37
  • Reply by Afshin
  • Iran
Anyone have any advice. I just tried EPR and mixer as well and that still didn't help
  • Posted 13 Mar 2025 02:52
  • Reply by Michael_Brown
  • Ohio, United States
Well, I completely took apart the EPR, the mixer and the throttle body cleaned everything up and it fired right up and I let it idle for a few minutes until I shut it off. Now I can't get it to restart again lol
  • Posted 4 Mar 2025 08:19
  • Reply by Michael_Brown
  • Ohio, United States

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