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Deep Transmission Pans Explained
Deep Transmission Pans Explained
How a deep transmission pan adds fluid capacity, cooling, and a drain plug to protect a towing diesel automatic. A cheap, legal reliability upgrade. Read more...
Better Air Filtration and Why It Matters
Better Air Filtration and Why It Matters
Why air filtration efficiency protects a diesel engine, how to balance airflow and filtration, and why a sealed airbox matters. A legal upgrade. Read more...
Improving Braking for Heavy Loads
Improving Braking for Heavy Loads
How to stop a heavy diesel tow rig safely: prevent brake fade with quality parts, fresh fluid, trailer brakes, and engine braking. Legal upgrades. Read more...
Heavy-Duty Tie Rods and Steering for Towing
Heavy-Duty Tie Rods and Steering for Towing
Why heavy diesels wear out steering and how heavy-duty tie rods and drag links restore control for towing. A legal reliability and safety upgrade. Read more...
Silicone Charge-Air Boots Explained
Silicone Charge-Air Boots Explained
Why factory charge-air boots crack and blow off under boost, and how silicone boots hold boost, cut EGT, and prevent leaks. A legal upgrade. Read more...
Upgraded Radiators for Towing
Upgraded Radiators for Towing
Why heavy towing exposes a marginal diesel radiator and how an upgraded all-metal unit adds cooling headroom. A legal reliability upgrade. Read more...
Gauge Sets Explained: EGT, Boost, and Fuel Pressure
Gauge Sets Explained: EGT, Boost, and Fuel Pressure
What EGT, boost, and fuel-pressure gauges tell you and why each protects a diesel. A legal, informational upgrade for towing and reliability. Read more...
Transmission Cooling for Towing Explained
Transmission Cooling for Towing Explained
Why heat kills towing transmissions and how to stop it: auxiliary coolers, deep pans, temperature gauges, and fluid changes. A legal upgrade. Read more...
Improving Cold-Start Reliability the Right Way
Improving Cold-Start Reliability the Right Way
How to make a diesel start reliably in the cold: grid heater or glow plugs, strong batteries, block heaters, and fuel that will not gel. Read more...
Head Studs for Towing: Cummins and Duramax
Head Studs for Towing: Cummins and Duramax
Why head studs are a smart towing upgrade for Cummins and Duramax diesels: how they beat torque-to-yield bolts and when towing justifies them. Read more...
Upgraded Lift Pump Benefits Explained
Upgraded Lift Pump Benefits Explained
The benefits of an upgraded diesel lift pump: steady supply pressure, better filtration and water separation, and protection for the injection pump. Read more...
Adding a Fuel-Pressure Gauge and Why It Matters
Adding a Fuel-Pressure Gauge and Why It Matters
Why a fuel-pressure gauge is the cheapest way to protect a diesel injection pump, what it reads, and mechanical versus electronic options. Read more...
Coolant Filtration Kits Explained
Coolant Filtration Kits Explained
How diesel coolant filtration kits work, why casting sand and scale damage coolers, and which engines like the 6.0L Power Stroke benefit most. Read more...
CP4 Disaster-Prevention Bypass Kits Explained
CP4 Disaster-Prevention Bypass Kits Explained
What a CP4.2 disaster-prevention bypass kit does, how it contains a catastrophic pump failure, and how it compares to a CP3 conversion. Read more...
Why a CP3 Conversion Improves Reliability
Why a CP3 Conversion Improves Reliability
Why a CP3 conversion is a legal reliability upgrade over the CP4.2: fuel-quality tolerance, contained failure mode, and who should consider it. Read more...
Best Reliability Upgrades for Towing with a Duramax
Best Reliability Upgrades for Towing with a Duramax
The best street-legal reliability upgrades for towing a 6.6L Duramax: fuel system by generation, cooling, and Allison transmission care. No deletes. Read more...
Best Reliability Upgrades for Towing with a 6.7L Power Stroke
Best Reliability Upgrades for Towing with a 6.7L Power Stroke
The best street-legal reliability upgrades for towing a 6.7L Power Stroke: protect the CP4.2, cooling, charge air, and transmission. No deletes. Read more...
Best Reliability Upgrades for Towing with a 6.7L Cummins
Best Reliability Upgrades for Towing with a 6.7L Cummins
The best street-legal reliability upgrades for towing with a 6.7L Cummins: fuel system, cooling, transmission, and driveline. No deletes. Read more...
6.7L Power Stroke Rough Idle: Causes and Diagnosis
6.7L Power Stroke Rough Idle: Causes and Diagnosis
A rough or shaking idle on a 6.7L Power Stroke usually points to an injector, fuel-delivery, or regen-related cause. Diagnose the rough idle here. Read more...
LBZ Duramax Limp Mode: Causes and How to Get Out of It
LBZ Duramax Limp Mode: Causes and How to Get Out of It
An LBZ Duramax in limp mode or reduced power is protecting itself from a fault. Learn the common triggers and how to diagnose reduced power here. Read more...
6.4L Power Stroke Limp Mode: Causes and How to Get Out of It
6.4L Power Stroke Limp Mode: Causes and How to Get Out of It
A 6.4L Power Stroke in limp mode is protecting itself from a fault. Learn the common triggers and how to diagnose reduced-power mode here. Read more...
LLY Duramax Loss of Power: Causes and a Diagnosis Checklist
LLY Duramax Loss of Power: Causes and a Diagnosis Checklist
An LLY Duramax down on power often has an overheating-derate, boost, or fuel cause. Work through this loss-of-power checklist before buying parts. Read more...
6.4L Power Stroke Loss of Power: Causes and a Diagnosis Checklist
6.4L Power Stroke Loss of Power: Causes and a Diagnosis Checklist
A 6.4L Power Stroke down on power often has a boost, DPF, or fuel-delivery cause. Work through this loss-of-power checklist before buying parts. Read more...
LBZ Duramax Black Smoke: Causes and Diagnosis
LBZ Duramax Black Smoke: Causes and Diagnosis
Black smoke from an LBZ Duramax means too much fuel or too little air. Learn the common causes and how to diagnose the smoke here. Read more...
6.0L Power Stroke Black Smoke: Causes and Diagnosis
6.0L Power Stroke Black Smoke: Causes and Diagnosis
Black smoke from a 6.0L Power Stroke means too much fuel or too little air. Learn the common causes and how to diagnose the smoke here. Read more...
L5P Duramax White Smoke: Causes and Diagnosis
L5P Duramax White Smoke: Causes and Diagnosis
White smoke from an L5P Duramax usually means unburned fuel or coolant. Learn the common causes of white smoke and how to diagnose it here. Read more...
LML Duramax White Smoke: Causes and Diagnosis
LML Duramax White Smoke: Causes and Diagnosis
White smoke from an LML Duramax usually means unburned fuel or coolant. Learn the common causes of white smoke and how to diagnose it here. Read more...
LB7 Duramax White Smoke: Causes and Diagnosis
LB7 Duramax White Smoke: Causes and Diagnosis
White smoke from an LB7 Duramax usually means unburned fuel or coolant. Learn the common causes of white smoke and how to diagnose it here. Read more...
6.7L Cummins Hard Start When Hot: Causes and Fixes
6.7L Cummins Hard Start When Hot: Causes and Fixes
A 6.7L Cummins that cranks a long time when hot but starts fine cold usually has a rail pressure or fuel-delivery cause. Diagnose the hot start here. Read more...
6.4L Power Stroke Hard Start When Hot: Causes and Fixes
6.4L Power Stroke Hard Start When Hot: Causes and Fixes
A 6.4L Power Stroke that cranks a long time when hot but starts fine cold usually has a rail pressure or fuel-delivery cause. Diagnose the hot start here. Read more...
LMM Duramax No-Start: Causes and Diagnosis
LMM Duramax No-Start: Causes and Diagnosis
An LMM Duramax that cranks but will not start usually has a fuel supply, rail pressure, or sensor cause. Work through the no-start diagnosis here. Read more...
LML Duramax No-Start: Causes and Diagnosis
LML Duramax No-Start: Causes and Diagnosis
An LML Duramax that cranks but will not start usually has a rail pressure, CP4 supply, or fuel-quality cause. Work through the no-start diagnosis here. Read more...
LBZ Duramax No-Start: Causes and Diagnosis
LBZ Duramax No-Start: Causes and Diagnosis
An LBZ Duramax that cranks but will not start usually has a fuel supply, rail pressure, or sensor cause. Work through the no-start diagnosis here. Read more...
LLY Duramax No-Start: Causes and Diagnosis
LLY Duramax No-Start: Causes and Diagnosis
An LLY Duramax that cranks but will not start usually has a fuel supply, rail pressure, or injector cause. Work through the no-start diagnosis here. Read more...
L5P Duramax Overheating While Towing: Causes and Fixes
L5P Duramax Overheating While Towing: Causes and Fixes
An L5P Duramax that runs hot only under a trailer usually has an airflow, coolant flow, or regen-load cause. Diagnose the towing overheat here. Read more...
6.7L Power Stroke Overheating While Towing: Causes and Fixes
6.7L Power Stroke Overheating While Towing: Causes and Fixes
A 6.7L Power Stroke that runs hot only when towing usually has a cooling airflow, coolant flow, or aftertreatment load cause. Diagnose it here. Read more...
P0541 on the 5.9L Cummins 24V: Causes, Symptoms, and Fix
P0541 on the 5.9L Cummins 24V: Causes, Symptoms, and Fix
P0541 on the 5.9L Cummins 24V explained: intake air / grid heater relay circuit low causes, symptoms, how to diagnose it, and how to fix it. Read more...
P0341 on the 6.7L Power Stroke: Causes, Symptoms, and Fix
P0341 on the 6.7L Power Stroke: Causes, Symptoms, and Fix
P0341 on the 6.7L Power Stroke explained: camshaft position sensor range/performance causes, symptoms, how to diagnose it, and how to fix it. Read more...
P0336 on the 6.4L Power Stroke: Causes, Symptoms, and Fix
P0336 on the 6.4L Power Stroke: Causes, Symptoms, and Fix
P0336 on the 6.4L Power Stroke explained: crankshaft position sensor range/performance causes, symptoms, how to diagnose it, and how to fix it. Read more...
P0118 on the LML Duramax: Causes, Symptoms, and Fix
P0118 on the LML Duramax: Causes, Symptoms, and Fix
P0118 on the LML Duramax explained: engine coolant temperature sensor high input causes, symptoms, how to diagnose the sensor and wiring, and how to fix it. Read more...
P0112 on the LB7 Duramax: Causes, Symptoms, and Fix
P0112 on the LB7 Duramax: Causes, Symptoms, and Fix
P0112 on the LB7 Duramax explained: intake air temperature sensor low input causes, symptoms, how to diagnose the sensor and wiring, and how to fix it. Read more...
P0102 on the LML Duramax: Causes, Symptoms, and Fix
P0102 on the LML Duramax: Causes, Symptoms, and Fix
P0102 on the LML Duramax explained: mass air flow sensor low input causes, symptoms, how to diagnose the MAF and intake, and how to fix it. Read more...
P0106 on the 6.7L Cummins: Causes, Symptoms, and Fix
P0106 on the 6.7L Cummins: Causes, Symptoms, and Fix
P0106 on the 6.7L Cummins explained: MAP/boost sensor range causes, symptoms, how to diagnose the sensor and intake, and how to fix it. Read more...
P0193 on the 6.7L Power Stroke: Causes, Symptoms, and Fix
P0193 on the 6.7L Power Stroke: Causes, Symptoms, and Fix
P0193 on the 6.7L Power Stroke explained: fuel rail pressure sensor high input causes, symptoms, how to diagnose the sensor and wiring, and how to fix it. Read more...
P0191 on the 6.7L Power Stroke: Causes, Symptoms, and Fix
P0191 on the 6.7L Power Stroke: Causes, Symptoms, and Fix
P0191 on the 6.7L Power Stroke explained: fuel rail pressure sensor range causes, symptoms, how to diagnose the sensor and CP4.2 system, and how to fix it. Read more...
P226C on the L5P Duramax: Causes, Symptoms, and Fix
P226C on the L5P Duramax: Causes, Symptoms, and Fix
P226C on the L5P Duramax explained: turbocharger vane position causes, symptoms, how to diagnose the VGT actuator, and how to fix it. Read more...
P003A on the LML Duramax: Causes, Symptoms, and Fix
P003A on the LML Duramax: Causes, Symptoms, and Fix
P003A on the LML Duramax explained: turbocharger boost control position performance causes, symptoms, how to diagnose the VGT, and how to fix it. Read more...
P0490 on the LMM Duramax: Causes, Symptoms, and Fix
P0490 on the LMM Duramax: Causes, Symptoms, and Fix
P0490 on the LMM Duramax explained: EGR control circuit high causes, symptoms, how to diagnose the EGR valve and wiring, and how to fix it. Read more...
P0489 on the LML Duramax: Causes, Symptoms, and Fix
P0489 on the LML Duramax: Causes, Symptoms, and Fix
P0489 on the LML Duramax explained: EGR control circuit low causes, symptoms, how to diagnose the EGR valve and wiring, and how to fix it. Read more...
P0207 on the L5P Duramax: Causes, Symptoms, and Fix
P0207 on the L5P Duramax: Causes, Symptoms, and Fix
P0207 on the L5P Duramax explained: cylinder 7 injector circuit causes, symptoms, how to diagnose the Denso injector and wiring, and how to fix it. Read more...