Where is the fuel?
#1
Where is the fuel?
My 1996 F350 with a California Emissions 7.5, has had a miss in #5 cylinder for a bit. It does not smoke, uses a little oil(quart in 3000 miles) has 16 inches steady manifold vacuum, compression is lower than other 7 holes(115 compared to 145). Sets CEL with DTC P0305(misfire detected #5 cyl). When ambient air temps are real cold, under 45 degrees, when first started, you can hear a slight piston slap, which gradually decreases as it comes up to operating temps. Engine idle is very slightly rough, engine accelerates smoothly with no hesitation or apparent missing. The question I have is this: when I pull the spark plug on this cylinder, the plug looks as though it was just installed, no color, no oil, no unburned fuel! I played with it again this am, and felt all 8 injectors with engine running, all make a pulsing vibration, so it appears all are functioning, so why is there no color on plug?? Truck has 148,000, had new cat and muffler last year. Only problem I have had is I have had 2 rebuilt distributors fail, in the 3 years I have owned it, both failures were PIP sensors, now have a good used distributor with a new Motorcraft PIP installed. I think the distributor failure is what hurt the engine, as it sounded like a bunch of crossfires when it failed on Interstate 40. New engine on the way. Thanks for listening to my rambling! Dale
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vcpeppers
Explorer, Sport Trac, Mountaineer & Aviator
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12-16-2005 12:31 PM
keenanstahl
Explorer, Sport Trac, Mountaineer & Aviator
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07-23-2003 09:48 AM