Looks like there is a compucheck fitting behind your hand primer pump. Pop the cover off and get a compucheck quick disconnect adapter.
2006 peterbilt 379 cat c15 mxs on going fuel issue
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 379_dannyy_geee, Jun 22, 2019.
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Oxbow, anthonyar4, Wheeljack and 2 others Thank this.
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You will need a compucheck coupler attached to a fuel pressure gauge. Any hydraulic hose shop should have what you need or atleast be able to order. You can take the fitting with you to match.
pushbroom, Wheeljack and spsauerland Thank this. -
This is how I set up the fuel pressure gauge when I’m looking for running issues with this 3406E.
I have it on right now to help with starting issues.
I went to a hydraulic hose shop to get a fitting to hook the hose to.Wheeljack and spsauerland Thank this. -
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pushbroom, Wheeljack, spsauerland and 1 other person Thank this.
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I’m about to test fuel pressure. I adjusted the peddle calibration by turning on key then pressing and releasing peddle 3x. It went from 83% to 97% which I assume is normal because if it goes over 100% I’m told it will back down. Also found my floor mat was getting under peddle. On initial rev I noticed a lot more power. Will check fuel pressure and post results. Still in search of a tune for a 6NZ rated at 550hp 1250 tq. As my engine is a MBN
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