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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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2004 F 250 6.0: while driving drops to 500 rpm, no throttle

Customer Question

2004 F 250 6.0: while driving drops to 500 rpm, no throttle response, but will race and lurch forward at stops. this is after warming up.
New Fuel pump OEM
all NEW filters OEM
New fuel spring / OEM upgrade
New IPR pig tail OEM / soldered connection
New umbrella fitting in fuel tank after dropping tank / inspecting.
Houston - Powerstroke Majic Inc. cannot determine issue.
Submitted: 1 year ago.
Category: Ford
Expert:  Juan Crespo replied 1 year ago.

Hi there.

While knowing previous repair and service history is important, it's more important to know the current parameter indicator data (PID) - those will point us to the cause of the no-throttle-response issue.

Mainly, we need PID on accelerator/throttle position, as the sensors that generate those data are usually associated with the no-throttle symptom.

These are all computerized control systems and, to work on them, two things are required: technical knowledge and tools that can communicate with the onboard electronic modules.

I can provide the technical guidance, but whoever works on the truck needs to have access to a WDS or equivalent scan tool. Otherwise, it's all guessing, which leads to the unnecessary (and very expensive) replacement of parts.