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What did you do with your GMT400 today...or yesterday....
- Thread starter deejaaa
- Start date
Big T
Well-Known Member
That Ghia is like going back in time for me. I started my DIY mechanic career on air cooled VW engines. Are those dual Weber carburetors? Where’s the turbo?
Paveltolz
Доверяй, но проверяй
Yes, dual Webers and not replicas. No turbo different class
Big T
Well-Known Member
You could use Marty’s carb synchronizer tool.
Paveltolz
Доверяй, но проверяй
We’re good. Not Chris’ first rodeo.
MrMarty51
Well-Known Member
What I did with My GMT400 today, destroyed another injection pump or some such.
Whatever this means ? ? ? ?
Whatever this means ? ? ? ?
Paveltolz
Доверяй, но проверяй
Not exactly a “feel good” event.
Big T
Well-Known Member
A P0251 code on a 6.5L diesel engine typically indicates a problem with the fuel injection pump's optical sensor or camshaft position sensor circuit. This sensor, which reads the rotation of the injection pump's main shaft, is crucial for determining fuel injection timing. A faulty sensor, wiring issues, or air in the fuel system can trigger this code.
Paveltolz
Доверяй, но проверяй
I’m happy to report that the front end rattle is gone….
Truck is loaded up for the return trip. Heading home in the morning. I’ve got two engines I’ll be dropping off to other race teams on the way home. One is another VW for a fellow Gia driver. The other is an inline Ford unit going to a family with a long history of land speed racing (the 4th Generation is now driving). It’s a gift for the grandfather who’s dad used to run the same motor “way back when.” His kids will put it into their Streamliner without his knowledge and surprise him greatly. I’ll be dropping both of them off Sunday in Ogden before I get home.
Truck is loaded up for the return trip. Heading home in the morning. I’ve got two engines I’ll be dropping off to other race teams on the way home. One is another VW for a fellow Gia driver. The other is an inline Ford unit going to a family with a long history of land speed racing (the 4th Generation is now driving). It’s a gift for the grandfather who’s dad used to run the same motor “way back when.” His kids will put it into their Streamliner without his knowledge and surprise him greatly. I’ll be dropping both of them off Sunday in Ogden before I get home.
Paveltolz
Доверяй, но проверяй
I popped that code the other day. It launched the Service Engine Soon light but, self cleared. I checked codes and wrote it down and will see if it comes up again. It’s been over three weeks now and no instances. Normally I fill at Sinclair stations so I chalked it up to fuel as I had filled up at a Maverick and their fuel is the low cetaine (sp) bulk stuff that isn’t the best.
MrMarty51
Well-Known Member
I had fueled at the CENEX Zip Trip and mistakenly filled with their regular run of the mill diesel that most people fill up with, instead of their RoadMaster blend.
I did add about a pint of TC-W3 two stroke oil plus about enough Stanadyne Performance Formula supplement to make up for the estimated 20 gallons to fill the tank.
ak diesel driver
6.5 driver
The dye in the 2 stroke oil may be your issue
jrsavoie
Recruit
What diesel additives do you use every tank fill?
I use Clear-Diesel, Hotshots, Optilube XPD, John Deere & Power Service Gray in the summer - white in the winter.
I'm not too picky. Whatever I find when I'm looking.
For anything going in a can or storage I add some bug killer.
Amazon.com: Opti-Lube XPD All-Season Diesel Fuel Additive - Gallon (1 Gallon (Treats 512 Gallons)) : Automotive
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MrMarty51
Well-Known Member
Does this look too dark ?
The previous refueling took about 20 gallons. I did not add any two stroke to that tank of fuel. The last refueling I added about a pint of two stroke, that was about another 20 gallons.
And it was on this tank that the code about the optic sensor tripped.
This is the two stroke that I have been using.
And this is the fuel supplement.
I keep the additive in a bottle that services about 60 gallons and estimate how many gallons it will take to fill the tank and if I think it will be about 18 gallons I’ll add about a half a jug of the supplement.
Maybe I better hold off on the two stroke for several fuelings and get the color diluted down.
Also, this P0251 code never did trip even with the leaking remanufactured injection pump, nor with the previous pump that was sucking air, or, with the original pump that was on the original engine.
It didnt trip for about 30 or 40 miles, not until I was near 20 miles out did the engine stumble slightly but then run as normal until I made it another five miles after pulling over to diagnose the SES lamp.
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MrMarty51
Well-Known Member
A picture of the container hanging in a little more light.
Now letting that pail of fuel from the T fitting set to determine if there is bio diesel present.
If there is ANY amount of bio stuff will it separate out and settle in the bottom of the pail ?
One thing I did see was quite a bit of air coming through when obtaining this pail of fuel.
It did clear up so now I’ll be warming the engine again and seeing if it now still cuts out.
Maybe after I know the neighbors are up and attum.
Now letting that pail of fuel from the T fitting set to determine if there is bio diesel present.
If there is ANY amount of bio stuff will it separate out and settle in the bottom of the pail ?
One thing I did see was quite a bit of air coming through when obtaining this pail of fuel.
It did clear up so now I’ll be warming the engine again and seeing if it now still cuts out.
Maybe after I know the neighbors are up and attum.
jrsavoie
Recruit
Do you bleed the T valve when you bleed everything else?A picture of the container hanging in a little more light.
View attachment 94961
View attachment 94962
Now letting that pail of fuel from the T fitting set to determine if there is bio diesel present.
If there is ANY amount of bio stuff will it separate out and settle in the bottom of the pail ?
One thing I did see was quite a bit of air coming through when obtaining this pail of fuel.
It did clear up so now I’ll be warming the engine again and seeing if it now still cuts out.
Maybe after I know the neighbors are up and attum.
I always have. Unnecessary or not.
I've sometimes experienced improvement just as a result of draining the T valve
MrMarty51
Well-Known Member
No, I never have. I’ve drained it several times but there never was water in the fuel.
MrMarty51
Well-Known Member
I installed the momentary switch from the Leroy Diesel lift pump harness into the relay and pump wire onto the Air Dog system.
Now I can turn on the lift pump from under the hood and bleed the filters and drain the T-Valve without having to turn on the ignition switch from in the cab.
Got that all back together and the engine has not improved in the way it is running.
About out of ideas except to install the intake manifold and see if that changes anything.
Now I can turn on the lift pump from under the hood and bleed the filters and drain the T-Valve without having to turn on the ignition switch from in the cab.
Got that all back together and the engine has not improved in the way it is running.
About out of ideas except to install the intake manifold and see if that changes anything.
MrMarty51
Well-Known Member
Tried switching pump drivers with no improvement.
I’m at a loss other than installing the original lift pump back onto the engine, I know it was properly functioning except the advance stepper motor shaft was seized up.
Or else install the intake manifold and see if that makes a difference.
I’m just at a total loss on this one.
I’m at a loss other than installing the original lift pump back onto the engine, I know it was properly functioning except the advance stepper motor shaft was seized up.
Or else install the intake manifold and see if that makes a difference.
I’m just at a total loss on this one.
Big T
Well-Known Member
The two stroke dye won’t cause any issues. I’ve run it many times. Red dye diesel also will not cause issues.A picture of the container hanging in a little more light.
View attachment 94961
View attachment 94962
Now letting that pail of fuel from the T fitting set to determine if there is bio diesel present.
If there is ANY amount of bio stuff will it separate out and settle in the bottom of the pail ?
One thing I did see was quite a bit of air coming through when obtaining this pail of fuel.
It did clear up so now I’ll be warming the engine again and seeing if it now still cuts out.
Maybe after I know the neighbors are up and attum.