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'04 6.0 loss of acceleration 3 year old problem
About 3 years ago, I started to pull away from a stop sign. At about 15 mph, the engine lost acceleration. The engine did not stall, the RPM's just dropped to idle and the truck coasted for about 8 to 10 seconds. During this 8 to 10 seconds, the gas pedal was not resposive. Then, it returned to normal. No check engine light, no codes. It started doing it more and more often but with no pattern. Maybe 2 times in a week and then run fine for 2 or 3 months. Engine hot or cold, winter or summer, mostly under 20 mph but it did do it once at 60 mph. It was suggested to check the EGR. I did and cleaned it. Still no help. Replaced the fuel filters and air filter. Problem continued. Gave up and took it to the dealer Where they replaced the EGR and I think the MAP sensor. Ran fine for about 3 months. Did it again. A few months later the battery light started going on and off. The truck is an '04 but was built in '03. Engine is an '03. The truck only has 44,400 miles on it. I realized that the belt was slipping due to its age. It was suggested by the dealer the crankshaft postition sensor may be off due to the low battery. Replaced the belt. No help. Replaced the fuel pump. NO HELP!! Last week I started to leave work. Truck chugged and then died. I got a check engine light!! The truck started right up. Instead of checking it myself, I drove it to the dealer a mile away. ICP sensor. I replaced it. STILL, NO HELP. I checked the voltage on the ficm both koeo & koeo. 47.5 volts. Inspected th wire loom and found nothing. The truck is getting hard to start both hot and cold but runs great other than that. What am I missing???
Last edited by timewarp1934; 10-30-2012 at 07:39 AM.
Reason: miss spelled title