Hi Guys,
I'm starting to run out of ideas so I figured maybe someone here could offer some hindsight.
A few months ago the clutch went on the truck, and I did a couple of upgrades at the same time:
FASS lift pump
3k GSK (install using the click procedure found here)
#10 cam plate
Larry B fuel shutoff solenoid.
For a couple of various reasons I didn't put it all back together or tryed to start it until this week.
It will start if I give a bit of gas and seems to run great above 1100rpm or so, but if I let go of the gas it just dies. Will start right back up if I give gas.
I tried playing with the idle adjustment screw but the only way to keep it idling is if I set the idle above 1100rpm. If I try lowering even a tad it will die.
Since it runs, great above that, I don't think air in the lines or fuel pressure is an issue.
The truck idled great before, I parked it to change the clutch and I drained as much of the old diesel as possible and put new diesel in along with a can of Diesel 911 before trying to start it.
Just deleted the prefilter and heater, seems to run better but still not idling on it's own.
Install a fuel pressure gauge and measured the overflow valve spring and it was a bit short so I stretched it back to what it should be.
The truck will run at 800rpm now which is a huge improvement but still won't idle on its own.
Eitherway it's a tad under 20f here, I haven't eaten supper and the neighbours are going to hate me if I keep working on it. So further work will go to tomorow....
No one around to crank and it won't idle on it's own, so I couldn't check pressure (gauge on top of filter). I just rigged up a switch that goes from starter to battery so I can crank it from underneath the hood to check tomorow.
It runs fine above 1,000 rpm. That rules out the solenoid.
The fuel plate itself does not affect idle at all. Rule it out.
The FASS either provides enough pressure to run or not. It runs fine above 1,000 rpm. That sure sounds like it is working correctly.
The only logical thing left that you worked on that could cause this problem is the GSK. It is time to go back to it. Did you remove all of the spacers under the governor springs?
I change the solenoid because the relay crapped itself and not being in the us, shipping is more expensive than parts most of the time so I figured I'd order the whole solenoid kit since they are known to be problematic from what I've read.
I know the fuel plate doesnt do anything at idle but figured maybe something I did while installing could cause this... I have zero experience with this engine.
I think the fass is all good, it gets full voltage and etc...
I'll recheck the gsk (same reasons as above).
I have experience working on cars and etc... but next to none on diesels and zero on one with fueling like the P-Pump. So I read and went with the fuel system by Joe G first and try to read all the facts but found nothing with GSK and idle, so I didn't think of it. I will do the GSK with the measurements procedure instead of the clicks and take pictures of what I removed.
Hi Guys, A few months ago the clutch went on the truck, and I did a couple of upgrades at the same time:
FASS lift pump
3k GSK (install using the click procedure found here)
#10 cam plate
Larry B fuel shutoff solenoid.
It will start if I give a bit of gas and seems to run great above 1100rpm or so, but if I let go of the gas it just dies. Will start right back up if I give gas.
I tried playing with the idle adjustment screw but the only way to keep it idling is if I set the idle above 1100rpm. If I try lowering even a tad it will die.
It runs fine above 1,000 rpm. That rules out the solenoid.
The fuel plate itself does not affect idle at all. Rule it out.
The FASS either provides enough pressure to run or not. It runs fine above 1,000 rpm. That sure sounds like it is working correctly.
The only logical thing left that you worked on that could cause this problem is the GSK. It is time to go back to it. Did you remove all of the spacers under the governor springs?
I had the same kind of problem with my truck. After I did my 4000rpm springs only issue with mine is my crank sensor was out of wack make sure it has the proper distance from the crank to be reading accurately. my truck at 800rpm used to show I was at 1100rpm
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