Discussion:
runs rough with random backfire

Hello
We have a hyundia 30L-7 that has a very erratic miss and backfire. We cant make it happen, and it can be at anytime. Does anyone have any experience with this? We have in the past had a cat that the crank sensor was failing on that kind of acted like this but not sure if it's similar to the hyundias or not.

Any ideas would be appreciated
  • Posted 27 May 2015 00:53
  • By pat_r
  • joined 3 Jul'13 - 25 messages
  • British Columbia, Canada
Showing items 1 - 3 of 3 results.
Check the wires, connector of CAMshaft sensor, if not, check CRANKshaft sensor.
Change the Spark Plugs.
  • Posted 2 Sep 2020 03:52
  • By Rt210
  • joined 22 Oct'13 - 69 messages
  • BP, Hungary
I'm a beginner.
if this truck has a distributor and rotor, order the OEM rotor. I have had a few with a "**** near fits perfect" rotor, and the same symptoms, and it turned out to be the rotor was just a tad loose on the shaft when running.
  • Posted 4 Dec 2015 03:27
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
Did you get a resolution to this problem? I have a 25L-7M with about the same issues. Runs great then backfires and dies at random. Thanks
  • Posted 3 Dec 2015 14:36
  • By Hardline
  • joined 20 Feb'14 - 5 messages
  • Texas, United States

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.

Taylor TT300
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
UN Forklift FD50T-NJB3
HANGZHOU, Zhejiang, China
New - Sale
Latest job alerts …
Wentzville, MO, United States
Ottumwa, IA, United States
Harrisburg, SD, United States
Fact of the week
Bluetooth is named after the 10th-century Viking king, Harald Bluetooth, who united warring tribes in Denmark and Norway. In 1997, Jim Kardach from Intel gave the name to the technology because of its ability to unite different communication protocols, just as Harald united various tribes.
Global Industry News
edition #1235 - 19 June 2025
Greek philosopher Heraclitus is credited with the famous saying “change is the only constant”, and this week’s Forkliftaction News demonstrates this is certainly true in the case of the materials handling sector... Continue reading
Movers & Shakers
Pete Stanislawczyk Pete Stanislawczyk
Chief executive officer, East Penn Manufacturing
President, East Penn Manufacturing
APAC vice president, Jungheinrich
Senior VP direct sales and marketing, Daifuku Intralogistics America