That just gives you an idea of whether you have a blown head gasket and not really low compression due to rings.
If it was a compression issue the hard start would be evident all the time and you would also notice a significant loss of power. I agree with the comments below even without any glow plugs the engine should start quickly down to at least 20F. Sounds like you have perhaps one or more issues relating to fuel, either it has a lot of condensation in it or in the fuel bowl, it is loosing prime through the filter housing or you have some sort of fuel leak in the system. These trucks have known issues with the filter manifold leaking and also with rusting fuel lines. The glow plugs are there to heat the air as it enters the combustion chamber, cycling them multiple times wont do anything, they either work or not.Hey guys, I’ve got an 05 LLY that doesn’t start well below 30ish degrees.
It cranks for a pretty long while (going until the starter cuts out 4 or 5 times) before it finally goes.
I replaced all 8 glow plugs a few months ago, but it still does this. I’m thinking the actual plugs themselves aren’t getting enough current. Haven’t load tested them though. If it keeps up I might see if I can find an intake heater for it.
Any thoughts?
When was your last oil change? I would run a 5w-40 and see if that helps before going down the rabbit hole of glow plug/fuel issues. Should see an improvement for starting in cold weather,Hey guys, I’ve got an 05 LLY that doesn’t start well below 30ish degrees.
It cranks for a pretty long while (going until the starter cuts out 4 or 5 times) before it finally goes.
I replaced all 8 glow plugs a few months ago, but it still does this. I’m thinking the actual plugs themselves aren’t getting enough current. Haven’t load tested them though. If it keeps up I might see if I can find an intake heater for it.
Any thoughts?
I took out my grid heater
You probably shouldn't have removed the intake air heater. Winter always comes this time of year.I bought a fuel heater for my lift pump
You have a fully deleted truck and live in California?I took out my grid heater and have a fully deleted 15.5 lml with a lift pump. I have the same issues with “no start” whenever it gets into the 20s at night. I’m pretty sure there are two diesel types and here in California we get the diesel that gels up easier. I can keep pumping on the filter and cranking until after many attempts, I get an extremely rough white Smokey start. Maybe in Colorado they haven’t switched to winter diesel yet? I bought a fuel heater for my lift pump but haven’t installed it yet. We’ll see.
I live in one of 6 counties that don’t smog diesels. There are many deleted trucks once you’re out of the Bay Area/Los angeles. I fully deleted my truck @8k miles from def issues and the truck has been awesome ever since. Except when it’s very cold. Then it starts like an old tractor. Runs fine tho after its high idle.You have a fully deleted truck and live in California?
the truck runs for at least an hour (usually 3 or more) they’re brand new Caterpillar batteries 880 cca.What brand of batteries and how old? What are the CCA ratings on those batteries? How much driving do you do with the truck each day?
changed the oil over thanksgiving, put 15-40 rotella inWhen was your last oil change? I would run a 5w-40 and see if that helps before going down the rabbit hole of glow plug/fuel issues. Should see an improvement for starting in cold weather,
I know you said you replaced the glow plugs. Where did you get these glow plugs and what brand are they?Update for y’all to look at:
I replaced the glow plug controller. Plugs stayed on for a while (2-3x longer than usual) but it was only 5-10 seconds. Truck fired up just fine. Went to do it again the next day and controller left them on for maybe 2 seconds and it didn’t start well at all.
I’m thinking the controller is shorting out and there’s an issue in the circuitry that blows the controller. Any thoughts?
They were from diesel rx, not sure the voltage on them but it specified that they were for the lly or lb7I know you said you replaced the glow plugs. Where did you get these glow plugs and what brand are they? *you could have 12v plugs instead of the 4.7v you need.
100% your issue. Lb7 and lly plugs are different. Get those out asap and get some acdelco 63g’s.They were from diesel rx, not sure the voltage on them but it specified that they were for the lly or lb7
Any Recommendations for a website to order from? I'm in Montana and don't want to drive 2 hours each way to the dealer.100% your issue. Lb7 and lly plugs are different. Get those out asap and get some acdelco 63g’s.
Rockauto will probably be the cheapest at $18.80 ea. I got mine off Amazon for the free shipping. But some local auto parts stores will carry acdelco parts, just make sure they are 63g.Any Recommendations for a website to order from? I'm in Montana and don't want to drive 2 hours each way to the dealer.