Dynomite Diesel PAFC Spring Air Fuel Control | 1994-1998 RAM 2500/3500 5.9L 12V Cummins P-7100

Features

• Heavy-duty AFC spring designed for modified P-7100 injection pumps

• Controls pre-boost fuel delivery to reduce smoke and prevent excessive EGTs

• Ideal for trucks with large injectors and upgraded turbochargers

• Maintains throttle response while enhancing tuning flexibility

• Helps maximize clean, efficient power under acceleration

• Simple installation with direct fitment for 12-valve Cummins engines

• Backed by a 3-year manufacturer warranty

Performance Upgrade for High-Horsepower Builds

The Dynomite Diesel PAFC Spring Air Fuel Control is built to manage aggressive fuel delivery setups on performance-built 1994–1998 Dodge 5.9L Cummins trucks running the P-7100 injection pump. This stiffer AFC spring provides greater resistance, helping limit fuel injection until the turbo has time to spool. That results in lower smoke output during takeoff and reduced stress on the engine caused by high exhaust gas temperatures. It’s an essential upgrade for anyone pushing their Cummins past 525 RWHP with larger injectors and airflow modifications.

Built for the Demands of Modified P-Pump Trucks

While stock and lightly tuned trucks may not benefit from this spring, those running large nozzles or compounds will see better drivability and tuning results. By delaying full fuel delivery until boost is present, this spring balances performance and longevity—making it a must-have for high-powered street and race builds. The durable construction and simple install make it a go-to upgrade for fine-tuning any aggressive P-pump setup.

Fitment

1994, 1995, 1996, 1997, 1998 Dodge Ram 2500 & 3500 5.9L Cummins with Bosch P-7100 Injection Pump

Fitment Notes

• Designed for use with high-flow injectors and turbo systems

• Not recommended for trucks with stock or near-stock fueling setups