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Fuel
How to Wire a Secondary Fuel Pump: Relay, Trigger, and Controller Setup for Dual-Pump BMW Builds
The second Walbro 450 in our dual pump LPFP kits pulls about 19 amps at 80 psi, so our activation harness gives it its own fused relay circuit. Our support guide to...
Fuel
BMW Low Fuel Pressure Codes Explained: 29F2, 29DC, and When Your LPFP Is Dying
What BMW codes 29F2, 29DC, 2FBF and 2AAF mean, the 5 bar low side log that tells a dying LPFP from an HPFP on the N54, N55 and B58, and which pump...
Maintenance
BMW Carbon Buildup: Why Every DI Engine Gets It and How to Fight Back
Every direct injection BMW cokes its own intake valves with oil vapor. Here are the symptoms in order, what walnut blasting costs owners, and what catch cans and cleaners can and cannot...