Hmmm. I'll have to get part numbers for the plugs.
CK5
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2000 GMT400 CREW CAB SFA SWAP-The Warden: Fuel leak fixed and awaiting surgery…
- Thread starter GWeakland620
- Start date
The ultimate goal for this truck is tow duty/family camping trips/small offroad adventures.
Have seen the solenoid on diesels open and close but not allow the fuel to move through correctly. Typically there is other indicators of that fuel issue, same with the lift pump.
Does it nose over on higher rpm?
Does it nose over on higher rpm?
Like, try to keep it steady at 2,000rpm and it just slowly creeps up?
I have plantar fasciitis. Not lead foot.
Like runs out of power on the top end due to inadequate fuel supply
Yeah, it's always done that. I just thought that's how they were. I figured turbo pressure fades out, and they just didn't make much power at higher rpms.
FWIW, that's what I thought you meant.
@GWeakland620, yes, these engines do run out of oomph at the high end, but you shouldn't be losing turbine pressure. I wish you had some other 6.5 trucks around to establish a baseline. Maybe I'll hafta "borrow" your truck next time I'm down there and let you know how it compares to the 6.5 trucks that I have driven.
A plugged fuel filter will manifest itself as a gradual losing of power under heavy throttle. But unlike a gasoline engine, it will continue to run smoothly, so it can be quite a while before the user notices.
But that still won't cause white smoke at startup.
FWIW, that's what I thought you meant.
@GWeakland620, yes, these engines do run out of oomph at the high end, but you shouldn't be losing turbine pressure. I wish you had some other 6.5 trucks around to establish a baseline. Maybe I'll hafta "borrow" your truck next time I'm down there and let you know how it compares to the 6.5 trucks that I have driven.
A plugged fuel filter will manifest itself as a gradual losing of power under heavy throttle. But unlike a gasoline engine, it will continue to run smoothly, so it can be quite a while before the user notices.
But that still won't cause white smoke at startup.
This truck is available to be borrowed whenever, by whoever.
The fuel filter was pretty bad when I purchased this truck. It has since been replaced a couple times. I really need to get my boost gauge hooked up, so I can see what's going on there. I may just throw it in there real quick to night to see what numbers I am getting.
What have you been doing to have needed to change your filter multiple times? My 1988 owner's manual says to change it every 60k miles. I have clean filters on both of my diesel rigs, but as one of them has <5000 miles and the other just broke 20k, I don't expect to be changing either of them in the near future.
Falling flat on its face at high engine speed is pretty much the signature identifying mark of a 6.2 engine (aside from the trademark sound). Turbocharged 6.5s are better, but still have some of the family resemblance. I'm not convinced that he's having a power problem, I thought he was enjoying the increased performance that new injectors brought.
The new injectors do feel great. I'm not sure I am really having this "upper end" issue. The injectors are new and now the fuel filter is. The filter was replaced right before the injectors, and that was the 2nd one. The first filter I pulled after I bought the truck, was pure black. So I ran a new filter for a while and swapped it out after a few thousand miles. I am going to hook up my boost gauge and see what's up tonight.
Started on the shackle flip last night. I cannot wait to get it finished. It is going to look so much better with the correct stance.
After your boost gauge, you should look into a fuel pressure gauge. I still think it's running out of fuel pressure.
I have 3 gauge spots. I was thinking boost, egt, and trans temp. Maybe a 4 gauge would be better.
Good news! I found this today while hooking up the boost gauge.
I don't like those click fittings. They're less fun to work with and they seem to leak more often.
