7.3 lost power - Ford Powerstroke Diesel Forum
 
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post #1 of 6 Old 09-05-2006, 12:40 PM Thread Starter
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7.3 lost power

hi lost power and running rough , sounds like only four cylinders. mechanic says it is the ecu failed but why ??? any advice would be great.
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post #2 of 6 Old 09-05-2006, 01:00 PM
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hang in there, we will have some sound advice for you shortly, throwing any codes to speak of?

does it run better once you get moving, or all the time?

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post #3 of 6 Old 09-05-2006, 01:07 PM
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Look at the wiring harness on the injectors. Pull the valve covers and make sure you got a good connection there.

By the way...Welcome to the forum!

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #4 of 6 Old 09-05-2006, 01:45 PM
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Change the oil and oil filter before you do anything else, as "bad" can cause our trucks to run bad due to the fact that the injection system works off high pressure oil, if that doesn't work have someone with a scan tool do an injector kill test to find out if you have any injectors not firing or if the are just firing weakly! Welcome and I hope you get you truck runnin!
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post #5 of 6 Old 09-05-2006, 05:24 PM
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I agree, an oil change at this point isnt a bad idea....but i doubt the PCM is bad. I would bet on it being ether a disconnected under valve cover harness or a bad injector or two..

when was your last oil change and fuel filter change??
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post #6 of 6 Old 09-05-2006, 07:35 PM
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Don t feel that your the only one I m going through the same type of thing I had to leave my truck and toy hauler About 130 miles away" no fun " It was donig the same thing They told me I had 3 injectors showing bad

2000 F250 cc 4x4 4" lift BFG 315's,,dp tuner Auto Meter gauges, Hybrid 235cc injectors,TN BB turbo,water meth injection,Ragin intake,ITP boost fooler Banks intercooler,big head wastegate,power elbow,torque converter,6.0 tranny cooler,High flow intakes AIH delete air ride air bags,gibson 4" exhaust,zoodad mod, remote start, Pioneer dvd/ navigation Sirrus radio,sun coast tranny ,Bts valve body,H11 s,Engine rebuild .030 over,Fluid Dampner,203 thermostat

425hp 775 Tq
13.9 @ 95 mph
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