Report this forum post

Hi everyone, I am hoping that someone may be able to help me out on a problem with my truck.
I have a Mitsubishi FGC25K with a FG63 engine on LP.
When I came into this truck it had a blown head gasket. I did the repair on that, and now have another issue that arose after I put it all back together.
When I start the engine it idles very slowly, almost as if it is going to die out, then surges up in RPM, then drops off to its normal idle. I took a video of the problem so that there is an audio element to my question.
Any ideas where to start with this? The engine did not do this until I did the head gasket repair.
Thank you in advance for any help.
Here is the link to the video:

https://youtu.be/YPB2E9y9CYc

Chris
  • Posted 23 Apr 2020 23:23
  • Modified 24 Apr 2020 06:16 by poster
  • By Chris_Kladky
  • joined 23 Apr'20 - 1 message
  • Oklahoma, United States

This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.

Indicates mandatory field
Tusk 500PGH16
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
Mitsubishi Logisnext FD25T5M
Yokohama, Japan
Used - Sale
Upcoming industry events …
November 11, 2025 - Sydney, Australia
November 26-27, 2025 - Budapest, Hungary
May 20-22, 2026 - Jakarta, Indonesia
Global Industry News
edition #1252 - 16 October 2025
In this week’s Forkliftaction News , we report on the GEP Global Supply Chain Volatility Index which shows Asian supply chains are at their busiest since June 2022 while the US and Europe’s supply chains remain under-utilised. One of the report authors describes the situation as being “as stable as it’s going to get”... Continue reading
Global Industry News
edition #1252 - 16 October 2025
In this week’s Forkliftaction News , we report on the GEP Global Supply Chain Volatility Index which shows Asian supply chains are at their busiest since June 2022 while the US and Europe’s supply chains remain under-utilised. One of the report authors describes the situation as being “as stable as it’s going to get”... Continue reading

PREMIUM business

Tailift Material Handling USA Inc
Part of Toyota Industries Group - Leading manufacturer of High-quality machines.
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY
Tusk 500PGH16
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
Mitsubishi Logisnext FD25T5M
Yokohama, Japan
Used - Sale

PREMIUM business

Tailift Material Handling USA Inc
Part of Toyota Industries Group - Leading manufacturer of High-quality machines.
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY