CP3 in Ram verses CP4 in Ford and GM
Is there someone that could possible explain the difference in the cp3 system that is in a Ram verses the cp4 system that is in a Ford? The high pressure Fuel Pump, is it just a brand difference or an...
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The CP3 was the predecessor to the CP4. CP3 has a 26k max PSI whereas the CP4 can hit 29k PSI for emissions purposes. The biggest difference from a consumer standpoint is in the way they fail. CP3 typically just start loosing rail pressure when they go bad. Replace the pump and your on your way again. When the CP4 lets go it typically grenades throwing metal shavings into your fuel lines and injectors. Entire fuel system has to be replaced to the tune of $10-12k if out of warranty.
A lot of new Dmax owners are putting CP3 conversions on their truck as an insurance measure.
A lot of new Dmax owners are putting CP3 conversions on their truck as an insurance measure.
