My lb7 is havin issues I've had it for almost year had issues with fuel filter head changed all o rings and now all of a sudden it won't start in cold weather but if u put it in a heated garage it starts up any ideas?? Thanks
02 lb7 help!!
- Thread starter eutsey04
- Start date
Yea rebuild kits in the filter head n it's like anything under 40 degrees won't start the primer pump won't get hard either but it gets stiff gonna try lookin for air leaks today
My truck starts easily at -20F without using the glow plugs. I'd look elsewhere for your problem.
Yeah I doubt it's glow plug related. My lb7 started fine in the 20s with the glow plugs disabled
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Wow I need to get more knowledge of the diesel engine.. I thought you need glow plugs to start the engine?? Dissabling them?
Glow plugs are only there to heat the cylinder and help combust the fuel when starting. A lot of the big trucks don't have glow plugs or intake heaters.
I bled fuel filter head 3 times today n it started up all day but took a little bit before it started did a lot of cranking but eventually fired up
I had a starting issue with my truck about a little over a month ago and it was just the bleeder skrew ontop of the fuel filter housing
Indirect injected diesels need glow plugs big time. Engines like the gm 6.5, 6.2, and pre 93 7.3 and 6.9 Ford are very reliant on glow plugs to start. But newer direct injection engines like Duramax's don't really need them till it's stupid cold out. They're mainly there for emissions and help to clean up cold start smoke.
If you're bleeding the filter and getting it to start I'd say you have an air leak somewhere. It doesn't take much of one to start doing that. I'd bet you either have a cracked filter head or rubber fuel line. Worst part is its all but impossible to track down a leak like that without putting the system under positive pressure. If you ever considered putting a lift pump in your truck now would be a good time and a good excuse. That will put the front 3/4 of the fuel system under 8-12psi and your leak will hopefully show up quick
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If you're bleeding the filter and getting it to start I'd say you have an air leak somewhere. It doesn't take much of one to start doing that. I'd bet you either have a cracked filter head or rubber fuel line. Worst part is its all but impossible to track down a leak like that without putting the system under positive pressure. If you ever considered putting a lift pump in your truck now would be a good time and a good excuse. That will put the front 3/4 of the fuel system under 8-12psi and your leak will hopefully show up quick
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I replaced the head and put new lines on it but I went out this morning and it wouldn't start I was thinkin of buyin a lift pump and tryin it
I just did injectors on an 02 and all the rubber lines were very cracked and dry rotted. They weren't leaking yet but it wouldn't have been long. Especially the short one that hooks the ficm to the steel line
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