Tech Tip: Dodge Ram no-start, no DTCS

Sept. 6, 2017
The vehicle has no fuel pressure, even after verifying voltage, swapping the fuel pump relay and replacing the fuel pump.

Vehicle: 1996 Dodge Ram 1500, 4×2, V8-360 5.9L Magnum, Automatic Transmission

Mileage: 228,995

Problem: The engine will crank but not start. The MIL was not on and there were no DTCs.

Details: The technician verified the engine will crank but not start. It had spark but no fuel pressure. He verified voltage on both sides of the fuel system fuses, swapped the fuel pump relay and tried replacing the fuel pump. Still, there was no fuel pressure. At this point, he called ALLDATA Tech-Assist.

The ALLDATA Tech-Assist consultant suggested that he check for power and grounds at the pump. The technician found no voltage at the fuel pump (Circuit A61). He traced the circuit back to the fuel pump relay and found the circuit was open about 10 inches from the power distribution center.

Confirmed Repair: He repaired the wiring and the truck started and ran normally. He also rechecked the fuel pressure. It was at factory specifications.

Information provided by: ALLDATA

Sponsored Recommendations

Tesla service, repair, and diagnostics

Keep update-to-date on how to maintain your customer's Tesla vehicles.

Tool Review: Ascot Supply 3/4" Drive 600 ft-lbs Split Beam Torque Wrench, No. 168-00600

Reviewed by Eric Moore, manager at DeMary Truck in Columbus, Ohio.

Diagnosing an engine misfire

Recognizing a misfire is the easy part; the challenge is determining its cause.

The ‘Iron Giant’

This technician spent two and half years putting together his ‘giant’ of a toolbox setup.

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!