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Camper_Jeff___K's avatar
Camper_Jeff___K
Navigator
May 31, 2025

Does A Ford 6 Liter Coolant Filter Work And FICM Test

Does A Ford 6 Liter Coolant Filter Work And FICM Test

Does A Ford 6 Liter Coolant Filter Work And FICM Test See what it looks like inside a coolant filter when I take it apart and clean the filter. Does it really work protecting your engine? The truck is still running rough with codes for injectors 1 and 8. I am eliminating possible causes, step by step. The FICM voltage test is the next step and if that checks out ok, then I move along to the fuel system to determine if that is the problem. If you have a FORD 6.0 or 6.4 liter engine, this may help you.

Since the wire harness and FICM seem to check out OK, My next avenue of investigation is with the fuel system. I will change the filters with Motocraft, and test the fuel pressure static and under load. I can also check the pressure regulating spring and replace it with a Blue Spring kit. That kit is supposed to be one of the best and easiest upgrades you can do. As per usual, I'll keep you informed of progress on getting this bugger fixed. Thanks for any input.

2 Replies

  • Grit_dog's avatar
    Grit_dog
    Navigator II
    Jun 01, 2025

    Might suggest getting advice and tips from a group dedicated to these engines. 
    Given their ….track record…. there’s volumes of intel out there.  Just not here. 

    • Camper_Jeff___K's avatar
      Camper_Jeff___K
      Navigator
      Jun 01, 2025

      My experience with forums is a lot of people are asking questions, and getting mostly snarky replies and few correct if any answers. Generally a waste of time. There are however many decent video resources on YouTube. When, not if, I get this figured out, there will be another helpful how to video posted on my channel, joining the other nearly 1200 other how to, travel, and other assorted topic videos I have already posted. Getting ready to test fuel pressure now. Bought 3 filters, oil, fuel top of engine, and fuel on frame. Many frame rail fuel filters apparently never get changed due to being in a difficult to reach location next to the transfercase. There is also a water separater to drain and clean. Have a pan under when servicing. If this isn't the problem, then I will have to start pulling valve covers and looking at dummy plugs, injectors and anything else. It's a step by step process, simplest to toughest, it will just take a little more time before we can get back on the road. Remember, I'm an expert at acquiring unreliable F Series trucks.

      Enough funning, must get behind in motion, it won't fix itself we all know. Take care...

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