Joey Mack Posted March 1 Share Posted March 1 The fuse panel in the cab, right side Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-547466 Share on other sites More sharing options...
fjh Posted March 1 Share Posted March 1 5 minutes ago, Joey Mack said: Dumb Me..... I see the outline of the cab where the hood comes down.. R model it is.. Nope not dumb ! I just think your glasses were smudged ! 🤣 2 Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-547467 Share on other sites More sharing options...
fjh Posted March 1 Share Posted March 1 7 minutes ago, Joey Mack said: The fuse panel in the cab, right side Another place you can look here is the Vecu check the plug to this its under the mid dash and unfortunately its mounted wire side up and if the windshield leaks it can cause gremlins if water gets into the plug or The ecu itself! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-547469 Share on other sites More sharing options...
HarryBiron093 Posted March 1 Author Share Posted March 1 Connections are all clean and there’s no resistance to the battery’s from any of the grounds. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-547481 Share on other sites More sharing options...
HarryBiron093 Posted March 1 Author Share Posted March 1 That’s a great idea I will check the vecu tomorrow. I do remember there being dampness on the passengers side floor so I will see if I can replicate the symptoms. Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-547482 Share on other sites More sharing options...
fjh Posted March 1 Share Posted March 1 1 hour ago, HarryBiron093 said: That’s a great idea I will check the vecu tomorrow. I do remember there being dampness on the passengers side floor so I will see if I can replicate the symptoms. The fuel pedal has a close relationship with this also ! Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-547484 Share on other sites More sharing options...
Solution Popular Post HarryBiron093 Posted March 17 Author Solution Popular Post Share Posted March 17 Guys, I wanted to share that we solved the 3-4 code when it’s raining out. The wires going to the cam sensor had a short in them behind the valve cover where it goes over the bell housing. I had some good rain and was able to verify that was causing all the havoc ! Thanks to everyone that helped. The next issue is the engine hunts at idle, some days it does other days it dosnt. The passengers side fuel tank has air coming into it when the engine hunts. I assume the return is on that side ? Where would you check for air ? Plumb a clear hose in somewhere ? 3 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-548287 Share on other sites More sharing options...
Popular Post Joey Mack Posted March 18 Popular Post Share Posted March 18 I am really glad that you posted the fix and a picture.. Too many guys throw money and parts at the issue, when in many cases its a wire.. I preach this 90% of the time. well really 100%, but you get my drift.. You are proof to the next guy that you need to diagnose the issue, not try to buy the repair.. Jojo 1 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-548288 Share on other sites More sharing options...
HarryBiron093 Posted March 18 Author Share Posted March 18 Thank you all so much for the help ! Quote Link to comment https://www.bigmacktrucks.com/topic/72930-3-4-code-e7/page/2/#findComment-548332 Share on other sites More sharing options...
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