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Loch Doun Ventures Nov 23, 2023 08:23 AM

Loss of power
 
I own a 2012 merc sprinter 310 that losses power in gears 3 & 4 around 2000revs any suggestions? Regards ian

DNickyyyy May 14, 2025 05:58 AM

Hey Ian — that sounds like a classic case of the turbo not kicking in properly or something limiting boost under load. A few things to check:
  1. Turbo actuator or vanes sticking — quite common on Sprinters.
  2. Boost leak — check all hoses, intercooler, and clamps for splits or loose fittings.
  3. MAF sensor — if it’s dirty or faulty, it can cause limp-like behavior.
  4. EGR valve sticking — can restrict airflow and kill power in mid gears.
  5. No fault codes? Sometimes there’s a soft limp mode with no light — a diagnostic scan will help.
I'd start by checking for codes even if no lights are on — it might point straight to the issue. Hope that helps!

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