SureTrack Real Fix: Smokin’ Diesel

Real Fixes from ShopKey’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free with the purchase of a current Snap-on® diagnostic software version or in our ShopKey Pro product.


A popular modification to diesel trucks called “rolling coal” causes them to belch black smoke. But not everyone wants their truck to be an annoyance to the public. Follow this Real Fix to see how a problem with this Ford Super Duty caused it to have black smoke come from the exhaust.

Vehicle
2003 Ford Pickup F250 Super Duty 6.0L

Title
Black Smoke Comes From Vehicle, Replaced Injector Control Pressure Regulator

Complaint
The customer states there is black smoke coming from the vehicle.

Cause
Confirmed the customer’s complaint and found black smoke came from the vehicle. Test drove the vehicle while monitoring live data on a scan tool and found the fuel injection control pressure (ICP) sensor indicated low fuel pressure. Inspected the ICP sensor wiring and connector, but found no faults. Connected a fuel pressure gauge to the fuel rail, started the engine and found the measured fuel pressure was below the specifications. Removed the injector control pressure regulator and found the regulator spring was compressed and weak. These test results verified the injector control pressure regulator was faulty.

Correction
Replaced the injector control pressure regulator and verified the vehicle operated properly. The customer’s concern did not return.


SureTrack® adds to the power of ShopKey Pro with an exclusive combination of expert knowledge and detailed parts replacement records, all wrapped in an interactive community. Designed to help automotive shops increase accuracy and efficiency from diagnosis to completed repair, the industry’s most comprehensive repair information resource is just a few clicks away.

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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.