"Miss" on initial start up
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4wd Low
Joined: Oct 2022
Posts: 11
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"Miss" on initial start up
2000 F350 extended cab, 7.3, ZF6 tranny. Farm truck. Bought last year.
100K miles and set up for a couple of years.
Majority of under hood wiring replaced due to mice/rodent damage.
Fuel tank dropped to check for trash and to do pickup mod. No trash noted but approximately 1 to 2 cups of "chicken fat" on the tank walls. Cleaned out.
New sensors replaced due to damage/age.
Suspect glow plugs need replacement and possibly glow plug relay.
On initial start-up, engine run rough until temp reaches 100-125 degrees, The engine will the smooth out and run like a clock. Sometimes on start it will smoke, other times not.
After start up, no smoke is noted, other than a slight dark haze while under a load or hard acceleration. Starts and runs well all day. Let sit overnight, does the same thing.
I'm thinking, due to the past of the truck, that I have bad seals on the injector o rings and several weak glow plugs.
Does my diagnosis sound correct?
All suggestions are greatly appreciated. .
100K miles and set up for a couple of years.
Majority of under hood wiring replaced due to mice/rodent damage.
Fuel tank dropped to check for trash and to do pickup mod. No trash noted but approximately 1 to 2 cups of "chicken fat" on the tank walls. Cleaned out.
New sensors replaced due to damage/age.
Suspect glow plugs need replacement and possibly glow plug relay.
On initial start-up, engine run rough until temp reaches 100-125 degrees, The engine will the smooth out and run like a clock. Sometimes on start it will smoke, other times not.
After start up, no smoke is noted, other than a slight dark haze while under a load or hard acceleration. Starts and runs well all day. Let sit overnight, does the same thing.
I'm thinking, due to the past of the truck, that I have bad seals on the injector o rings and several weak glow plugs.
Does my diagnosis sound correct?
All suggestions are greatly appreciated. .
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
If I were working on this, the first thing I would do is disconnect the cam position sensor, then crank the starter and listen for any signs of a cylinder that has low compression. The starter will sound like it's "unloaded" for that one suspect cylinder. For that to work the cylinder in question will have to be in pretty bad shape. Or you could just go all in and remove the valve covers for a compression check. If the engine is good, you'll be pulling injectors anyway for rebuilding.
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Dennis690
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
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Mar 18, 2004 07:55 AM
