Jun 22, 2020 · However, the failure rate of CP3 pumps was infinitesimal in comparison. Are there diesel pumps labeled CP3 only that dispense magic fuel? No. Nobody got bad fuel in a CP3? The CP3 is a …

Jan 9, 2021 · Ram cp4 failure thread - Post all CP4 failures here DO NOT start a new thread.

Apr 27, 2022 · Bought a 2020 Ram 2500 6.7 turbo diesel cummins. Had bad luck the first week. The injector pump failed. Had to be towed to Ram dealership. Bosch cp4 is a faulty pump with a bad …

Ok so bought a new 2020 Ram 2500 December 30, 2019. Got 7023 miles with CP4 failure. Guess I should have done better homework.

Jan 9, 2021 · Ram cp4 failure thread - Post all CP4 failures here DO NOT start a new thread.

May 19, 2020 · 2019 was the first year for the CP4 in the Ram/Cummins. Prior to that, all common rail Dodges/Rams from 2003-2018 had the super reliable CP3. The CP4 is a POS, but those class …

Feb 10, 2025 · My dealership preformed the recall to change out the High-pressure Fuel Pump CP4 and install the CP3 on my 2019 Ram 2500 6.7 Cummins with 130K on it. This was a task from all …

Mar 24, 2025 · Never said it would prevent failure. However, it survived a destructive "killer" test far beyond the venerable CP3. So what you're saying is RAM/Cummins is lying about the pump design? …

Jan 9, 2021 · Ram cp4 failure thread - Post all CP4 failures here DO NOT start a new thread.

Jun 22, 2020 · Here's some facts that make the CP4 story look bad: - According to a lawsuit with Ford/GM on CP4 the failure rate is ~7%. I don't know how that has been calculated but having …