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6.5L Turbo Diesel 1992-00 6.5TD - Discussion forum for the 6.5L engine.

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  #11  
Old 01-17-2018, 09:58 AM
Yukon6.2 Yukon6.2 is offline
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Too Bad i had my fingers crossed.
I have a 2000 burb that i kind of inherited.I traded a guy that was broke down with it for a Ford pickup.Then he died.He was supposed to come back and get the burb.
He spent days in the cold trying to get it to run,he butchered lots of stuff.
I keep looking at it and havn't come up with the nerve to try and get it running yet.
I hope you find the magic bullet soon.
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90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews
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  #12  
Old 02-13-2018, 06:57 PM
fredo fredo is offline
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Hey folks I'm at the point where the truck really has to go in. Can anyone recommend a good 6.5 shop in or near Portland? Any suggestions would be much appreciated. Thank you in advance!
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  #13  
Old 02-15-2018, 09:04 AM
DieselDavy DieselDavy is offline
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Sorry you're getting no response here. You might want to reach out to Robin. She is in your area and maybe can be of some help.
d
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  #14  
Old 02-15-2018, 05:57 PM
fredo fredo is offline
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I tried to message Robyn by clicking the icq.com link but I am getting a dead-end page. Am I doing something wrong? Sorry for veering off topic.
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  #15  
Old 02-16-2018, 06:26 AM
DieselDavy DieselDavy is offline
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Quote: "clicking the icq.com link "
I don't know what that means.
I just left click on her name and select "Send a private message to Robin". It works, I just tried it before posting this. (I ask her to look into this thread)
Dave
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Dave's Diesels:
Sold June, 07 '82 1/2 ton 4X4;340k miles
'97 2 Dr Tahoe, Intercooled,
Kennedy ECM, 4" Exhaust
'02 GMC
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  #16  
Old 02-16-2018, 06:36 AM
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Missy Good Wench ( Moderator)
 
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Hi

This issue certainly has a taste of PMD failure

There is a great little shop in Newberg called ADVANCED DIESEL

Fellas name is JOHN CULVER

He has a nice shop and knows the 6.5


If the PMD has not been replaced then it should be considered on the hit list.

The coming nasty cold/snowy/wet weather is going to make outdoor work miserable at best.


PMD issues rarely set codes.

One of your codes is for Injection pump cam and the other one is the crank position sensor.

These may or may not be related to each other.

CHECK ALL GROUNDS

BATTERIES, BLOCK AND FENDERS NEAR THE BATTERIES

Back by the tranny dipstick there are some ground wires that bolt to an intake manifold stud.
Be sure these are intact, clean and snug.

A bad ground can drive these rigs nuts. (You too)

Check the positives as well at the batteries.

With the rig running check the voltage at both batteries to be sure it is at least 13 volts and 13.5 to 14 is better.

Check the voltage at the power input lug on the large fuse block/relay center and see that it is also good.

Poor connections can be a nightmare with as many as there are.

If the above things turn up nothing then the focus may need to progress to the crank sensor.

Get the codes cleared and then see what comes back before getting wild on swapping parts.

The codes may be old

Ahhhh
One more thing

There is a small ground wire that fastens to the top of the injection pump near the PMD and it needs to be there.

If your PMD has been relocated to a remote site the ground wire from the harness that connected to the PMD near the pump needs to be grounded to the pump and not elsewhere.


Robyn
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Last edited by Robyn; 02-16-2018 at 07:13 AM.
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  #17  
Old 02-16-2018, 04:02 PM
fredo fredo is offline
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Hi Robyn, thank you for your response. See answers below:


If the PMD has not been replaced then it should be considered on the hit list.
>>> The PMD was the 1st thing that came to mind. I replaced it about 1 yr ago with a new, gray Stanadyne. Drove maybe 3-4000 miles since. It is remote mounted behind the bumper (more on that below)


PMD issues rarely set codes. One of your codes is for Injection pump cam and the other one is the crank position sensor. These may or may not be related to each other.
>>> After the codes are cleared they show up again like clockwork every time the engine stalls. Always P0251 and / or P0370, and sometimes P0606 after a while.

CHECK ALL GROUNDS - BATTERIES, BLOCK AND FENDERS NEAR THE BATTERIES Ė Back by the tranny dipstick there are some ground wires that bolt to an intake manifold stud. Be sure these are intact, clean and snug.
>>> Iíve done that as far as I could. Some of them are near inaccessible. The ones I did check all looked fine. This truck has pretty much no corrosion at all.

Check the positives as well at the batteries. With the rig running check the voltage at both batteries to be sure it is at least 13 volts and 13.5 to 14 is better.
>>> Both batteries are new, and Iíve replaced the crappy factory post bolts with stainless bolts and counter-nuts. I have not checked the voltage at the power input lug on the large fuse block/relay center, I will do that.

If the above things turn up nothing then the focus may need to progress to the crank sensor. Get the codes cleared and then see what comes back before getting wild on swapping parts. The codes may be old.
>>> The codes come back fresh every time

There is a small ground wire that fastens to the top of the injection pump near the PMD and it needs to be there.
>>> Yep it is there

If your PMD has been relocated to a remote site the ground wire from the harness that connected to the PMD near the pump needs to be grounded to the pump and not elsewhere.
>>> My understanding is that the extension harness contains a ground wire that connects to the ground at the top of the IP, which you mention above, through the original PMD harness. Secondly, the existing harness looked like eBay crap so I installed a new one that I ordered from Leroy Diesel.

More ramblings:



As I mentioned the ignition switch / harness are new. Now my switch works nice and smooth but replacing it did nothing to solve the engine stalls.


I recently swapped in the old PMD just to see what would happen. The engine stalled just the same, but on top of that it just would NOT restart. I am not sure what that indicates; with the new PMD, the engine usually restarts fine, as a matter of fact I am now an expert at restarting the engine in traffic without stopping.


The injection pump was replaced by the previous owner about 12,000 miles ago. Weirdly, the IP is about the only component in the engine bay that shows corrosion.


I checked fuel flow at the T-valve. At idle, I get one liter every 40-45 seconds. The lift pump seems to be working fine, and it sounds fine too.


In the fuel that came out of the T-valve, I found a few drops of water, and about a tablespoon worth of brown grit that looks a lot like rust.


I needed a new fuel filter, and since Iíve had a small fuel leak in the engine valley for a long time I figured why not swap out the entire Fuel Filter Manager? I would get a new water sensor and a new fuel heater for only $80 more than just the filter alone. Seemed like a no-brainer. Unfortunately, reinstalling the new FFM is a nightmareÖ


Thatís where I am! Thank you all for helping.
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  #18  
Old 02-17-2018, 07:56 AM
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Missy Good Wench ( Moderator)
 
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You are on the right track.

Clear all the codes and then see what shows back up.

The crank sensor may be the culprit. but rather than just tossing parts at the beast it is better to wring things out.


The fuel managers are notorious for rotting out in the bottom and causing leaks.

If you are getting a P0606 then there could be an issue with the computer itself.
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  #19  
Old 02-19-2018, 11:52 AM
DieselDavy DieselDavy is offline
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Fredo,
I like the way you ran down Robin's list, one by one.
On the "Ground wire on the top of the IP" note it sounded like you depended on the harness to provide that. Does this mean that the harness had a wire that breaks out and goes to the top of the IP? This could be it.

Robin, is that sufficient? Should there be a separate ground wire going from the PMD remote mount to the IP?

Fredo, Did you end up changing the Fuel Filter Manager or not? I can't tell from your post. If that doesn't fix it and the ground wire from pump to PMD isn't an issue, I'm guessing it's time to call Advanced Diesel!

(Just trying to find anything to help Fredo!)
Dave
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Dave's Diesels:
Sold June, 07 '82 1/2 ton 4X4;340k miles
'97 2 Dr Tahoe, Intercooled,
Kennedy ECM, 4" Exhaust
'02 GMC
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  #20  
Old 02-20-2018, 01:52 PM
fredo fredo is offline
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I took out the old filter manager but it looks like the ideal creature to install the new one would be 18 inches tall and have six hands. I'm also thinking that new rubber hoses should go in anyway, and test the lines to the tank for air leaks, and check the fuel sender unit (the fuel gauge swings wildly and the sender tubes could have pinholes in them).

I basically work on the sidewalk in front of my house, and it's covered in snow right now so this all looks a little daunting. As much as I don't like giving up, it doesn't seem completely unreasonable to let the pros take over

The Suburban is on its way to Advanced Diesel. I'll report back.
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