Hyundai 25L-7A:
Backfire on startup

Hyundai engine backfires on start up then runs fine after, replaced plugs, mixer diaphragm, rebuilt lp converter with the correct kit. Compression test shows all cylinders good and equal. Truck has check engine light on but can't access codes. Dealer is long distance away. Can you access codes without Hooking dealer only software to system?
Can you get the codes to flash the check engine light?
Any help will be appreciated.
  • Posted 4 Apr 2021 11:54
  • Discussion started by NHLIFT
  • New Hampshire, United States
Showing items 1 - 2 of 2 results.
Thank you. I will recheck the gap
  • Posted 6 Apr 2021 06:16
  • Reply by NHLIFT
  • New Hampshire, United States
Check the plug gap, I think they should be 30 thou, make them 25. If the eml is on chances are its the fuel injector. They are renown going. You cannot access codes without the software I dont think. But backfires are usually down to plug gap.
  • Posted 6 Apr 2021 03:42
  • Reply by andrew_k
  • England, United Kingdom

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