Someone with more knowledge should chime in soon.
possible injector problem
Thread Starter
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Elder User
Joined: Jul 2005
Posts: 659
Likes: 2
From: Berthoud, CO
possible injector problem
Ive had a miss when I start my truck for some time now. I always thought it was glow plugs that were bad, etc. Well its been 80 degrees in the morning when I start the truck, and the miss is still there. The miss goes away while driving, if you really push on the pedal, let it smoke like crazy for a while, and then voila, it runs fine. Is this an injector taking a bye bye, or should I be looking at something else? I thought I would ask before I have the truck put on the tester and spend the money.
Thanks.
Thanks.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Check with the Colorado Powerstoke Club, plenty of folks there close by and a great bunch of folks.
Colorado Power Stroke Club
Rockin S (Rocky) performance might be close to you also.
Rockin' S Performance
Colorado Power Stroke Club
Rockin S (Rocky) performance might be close to you also.
Rockin' S Performance
Mountain Pass
Joined: Feb 2003
Posts: 207
Likes: 2
From: parkersburg usa
Id bet a injector is going south. I had the exact same problem and narrowd it down to 4 injectors. Changed them and fixed. Mine would always miss on initial start up until it ran and got plenty warm or unless i realy mashed it needless to say injectors fixed mine.
Thread Starter
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Elder User
Joined: Jul 2005
Posts: 659
Likes: 2
From: Berthoud, CO
Yeah, that is exactly what is going on here. I need to get it scanned and see. What kind of prices are there on injectors anymore?
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
That is also classic symptoms of low compression on one cylinder. Because of the low compression it won't fire until the rest of the engine gets hot enough to heat that cylinder, then it clears out and runs fine.
With that said, I am recommending a compression check before you put any money down for anything else.
With that said, I am recommending a compression check before you put any money down for anything else.
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Thread Starter
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Elder User
Joined: Jul 2005
Posts: 659
Likes: 2
From: Berthoud, CO
Okay, so I had this scanned and nothing came up on the injectors or anything else. I let it warm up this morning to normal temp and took it for a drive. After mild driving for about 5 miles, it was still missing a little bit. Nothing seemed to clear it up except me flooring it for a bit, and then it cleared up and ran normal. Just in case I changed the fuel filter after all this. Any other ideas, or am I off to a shop for a compression check? Could I have a plugged injector?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
Sounds like you might have a valve train problem.
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Elder User
Joined: Jul 2005
Posts: 659
Likes: 2
From: Berthoud, CO
Sounds like a trip to the shop is in order. I dont know much about the valve setups in the 7.3's, but could this be a lifter that has gone south? Are the valves adjustable on a 7.3?