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overboost

  1. 6.0L Problems Forum
    2006 6.0 132,114 miles. I got caught in traffic during a road trip and temps were normal. As I was driving uphill is seemed like my truck downshifted and felt like even after taking my foot off the accelerator the turbo felt like it was still holding steady boost. I don’t understand exactly how...
  2. 911 Urgent Situations
    Just got my 2008 F450 with 42k miles, twice so far the boost gage has maxed out (both times at or near idle) and the truck surges ahead. Luckily my foot was on the brake both times but I had to brake hard to get the truck stopped. It stopped after maybe 10 seconds or so and went back to normal...
  3. 6.0 Motor problems
    Recently I had a FICM failure. The truck set high circuit codes for #'s 2,3,5,7. I think all of these are on the middle plug of the FICM. I had another FICM that I got from a friend, so I installed it and took it to the dealer to reflash the whole system. Currently the truck is still running a...
  4. 6.4 Motor Problems
    Ford recently reprogrammed the ECM on my 2008 F-350. After installing AFE CAI, dpf delete exhaust and an Edge evolution programmer, the engine goes to reduced power mode saying turbocharge overboost. trouble code P0234. Anyone heard of this or a fix?? Thanks
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