GMTD scan tech

[Goose57]

You are already hitting all the suggestions I would have here. I am sick right now so deep thought on stuff isn’t gonna work good. I will be coming up with round pegs for square holes right now. Video on that clear ip return line is about the only thing I didn’t see you suggest.

Thanks Will I’ll post a video.

 

[dbrannon79]

You are already hitting all the suggestions I would have here. I am sick right now so deep thought on stuff isn’t gonna work good. I will be coming up with round pegs for square holes right now. Video on that clear ip return line is about the only thing I didn’t see you suggest.

Hope you get to feeling better soon Will. have the misses make some chicken in the crock pot. the broth from that is some good feel good medicine! that and those liquid IV pouches you add to water bottles will give energy, though they have a good amount of salt and sugar in them.

 

[dbrannon79]

disconnect the batteries and leave for about 5 or so minutes. then crank up and recheck for codes. see if the balance codes are gone and not coming back up. those might indicate injectors. My 95 was funny about clearing codes with the scanner. disconnecting power did the trick for me.

 

[dbrannon79]

It's also good insurance to have the injectors tested and balanced. ask the shop if they can balance them all within 25psi of each other. spec should be 1950 psi iirc. An injector that pisses a stream can kill you new engine in a hurry! Marty had bought a set of new injectors a while back and found almost all of his were out of spec and leaked. Nothing bad towards Leroy or any other vendor selling them, it's all the manufacturing now in china. @MrMarty51 can give you info on who he used to have his done. there's also a member here who can do them as well.

 

[MrMarty51]

It's also good insurance to have the injectors tested and balanced. ask the shop if they can balance them all within 25psi of each other. spec should be 1950 psi iirc. An injector that pisses a stream can kill you new engine in a hurry! Marty had bought a set of new injectors a while back and found almost all of his were out of spec and leaked. Nothing bad towards Leroy or any other vendor selling them, it's all the manufacturing now in china. @MrMarty51 can give you info on who he used to have his done. there's also a member here who can do them as well.

I used a shop out of Glendive Montana. He used to do the 6.5 pump and injector work for the DOT over here in Miles City. We would pull and pack them and send them over to the Valley Motor Supply store over there, was then where his shop was setup.
He now is an INDY and still does mighty fine work.
IDK if he would test the electronical IP units, or maybe not even the mechanical ones.
I will know more tomorrow.
I put my injectors into a USPS flat rate box, send them to him in that. I think it was about $12.50 postage. That would be good from any location in the USA.

 

[ak diesel driver]

I'd suspect injectors. Leaking down before start up and generally not working right

 

[MrMarty51]

I'd suspect injectors. Leaking down before start up and generally not working right

Just pissing a solid stream with no atomization of the fuel.
Thats what six of the new injectors that I bought was doing.
They now have about 10,000 miles on them. Checked them all last night.
Two of the eight was almost to that degree. They all will go back to that shop and have him test and balance them once again. I do not want to take chances with this new engine.

 

[jrsavoie]

I got the rebuilt IP from Quadstar couldn’t get a new one. You think it could be a bad IP? I did not get any IP related codes. Had no trouble doing the Time Set and TDC Offset Learn. The only codes were in the history, cylinder balance codes and looks to be the same 4 Or 5 cylinder codes. I’m going to post some start up and run
Videos. Thanks for the input.

I trust Quadstar, but you never know.

If it was built their previous rebuilder, I would trust it 100%.

He quit fuel injection a while back and I believe he might bean emt now

 

[jrsavoie]

I used a shop out of Glendive Montana. He used to do the 6.5 pump and injector work for the DOT over here in Miles City. We would pull and pack them and send them over to the Valley Motor Supply store over there, was then where his shop was setup.
He now is an INDY and still does mighty fine work.
IDK if he would test the electronical IP units, or maybe not even the mechanical ones.
I will know more tomorrow.
I put my injectors into a USPS flat rate box, send them to him in that. I think it was about $12.50 postage. That would be good from any location in the USA.

Could you share the details on your rebuilder?

I haven't dealt with the guy in Michigan in so long. I'm not even sure they're still there

 

[jrsavoie]

Just pissing a solid stream with no atomization of the fuel.
Thats what six of the new injectors that I bought was doing.
They now have about 10,000 miles on them. Checked them all last night.
Two of the eight was almost to that degree. They all will go back to that shop and have him test and balance them once again. I do not want to take chances with this new engine.

The injectors were bad after only 10,000 miles?

 

[Goose57]

disconnect the batteries and leave for about 5 or so minutes. then crank up and recheck for codes. see if the balance codes are gone and not coming back up. those might indicate injectors. My 95 was funny about clearing codes with the scanner. disconnecting power did the trick for me.

I have got so many things in my head now I probably wasn’t clear that I’m able to clear the codes w/scanner then when I run the truck checking things they come back. Now we’re talking about the balance codes in the history only not current DTC,s. Will disconnecting the batteries cause the Time Set and TDC Learn go away and have to redo? Thanks a lot.

 

[Goose57]

I trust Quadstar, but you never know.

If it was built their previous rebuilder, I would trust it 100%.

He quit fuel injection a while back and I believe he might bean emt now

Yea I bought the LP last year from him. Probably Chinese. Thanks.

 

[Goose57]

Thanks guys for all your input. You don’t know how much it’s appreciated. Will I hope you get well soon.
I’ve been struggling w/ a cough and congestion it’s probably because of all the diesel exhaust. I will post a video of the clear hose. ak diesel driver and MrMarty51 mentioned injectors bleeding down and that got me thinking. Yesterday I pulled the oil dipstick and the oil was a pale grey color I thought it was just because of the fresh oil. I didn’t smell it. With all the testing and videos the truck has run for about a half hour. I believe Leroy said drain the oil that the motor was shipped with and put regular diesel oil back in w/a new filter. Run it for 30 minutes and change again. I’ll get an oil sample and try to post a pic. I believe I’m going to have the injectors checked and balanced. I just don’t know about the IP ?

 

[jrsavoie]

Thanks guys for all your input. You don’t know how much it’s appreciated. Will I hope you get well soon.
I’ve been struggling w/ a cough and congestion it’s probably because of all the diesel exhaust. I will post a video of the clear hose. ak diesel driver and MrMarty51 mentioned injectors bleeding down and that got me thinking. Yesterday I pulled the oil dipstick and the oil was a pale grey color I thought it was just because of the fresh oil. I didn’t smell it. With all the testing and videos the truck has run for about a half hour. I believe Leroy said drain the oil that the motor was shipped with and put regular diesel oil back in w/a new filter. Run it for 30 minutes and change again. I’ll get an oil sample and try to post a pic. I believe I’m going to have the injectors checked and balanced. I just don’t know about the IP ?

Just guessing the IP is good.

Might want to try searching their recent reviews on their rebuilt IPs.

Guessing they're still selling quality rebuilt units

 

[Goose57]

Just pissing a solid stream with no atomization of the fuel.
Thats what six of the new injectors that I bought was doing.
They now have about 10,000 miles on them. Checked them all last night.
Two of the eight was almost to that degree. They all will go back to that shop and have him test and balance them once again. I do not want to take chances with this new engine.

I believe my injectors are AC Delco. I think I got them off eBay. We probably have Chinese made injectors. You said you used a guy that moved to Indy that did your injectors. When you get time could I get his contact info. Because these injectors might be Chinese is there another injector out there I could use, especially since yours are already having problems at 10,000 miles.

 

[jrsavoie]

I believe my injectors are AC Delco. I think I got them off eBay. We probably have Chinese made injectors. You said you used a guy that moved to Indy that did your injectors. When you get time could I get his contact info. Because these injectors might be Chinese is there another injector out there I could use, especially since yours are already having problems at 10,000 miles.

Delco very well could be Chinese. I don't have a guess on that.

If you search "injectors Michigan", you should find info on the guy I used to use.

He did an excellent job. I had my pops set to 2200 or maybe 2300 psi.

The pop pressure you is up to you.

I mailed mine off to a place in Michigan. Somebody here recommended them years ago. For injectors - The last time I used Diesel Injection Service LLC 430 54th St SW Grand Rapids, MI 49548 (616) 531-1030 With 2300 PSI pop pressure

 

[dbrannon79]

Will disconnecting the batteries cause the Time Set and TDC Learn go away and have to redo?

No the PCM will keep those settings. disconnecting the battery will clear all the code history so you can start off fresh. also if you ever get a trans code, in order to clear it the batts need discoed as well.

I believe my injectors are AC Delco. I think I got them off eBay.

There are so many counterfeit Delco parts out there now. they go as far as copying the packaging too so there is really no way to tell if you have genuine delco or counterfeit unless you purchase from a delco authorized dealer. look on the delco site, it will show who are authorized to sell delco parts. even when attempting warranty they will only honor from authorized dealers.

 

[dbrannon79]

@MrMarty51 your injectors only lasted 10k miles after they balanced and tested them! would this be due to chineeseium? I would ask them to see what might be the cause of them not lasting.

 

[MrMarty51]

Could you share the details on your rebuilder?

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[MrMarty51]

The injectors were bad after only 10,000 miles?

@MrMarty51 your injectors only lasted 10k miles after they balanced and tested them! would this be due to chineeseium? I would ask them to see what might be the cause of them not lasting.

These are the made in India new Bosch injectors.
There was no core involved.
I didnt know about just slapping in a new set of injectors. I bought one of them made in India injector test stands and run them brand new injectors through the test.
Six of eight would not hold pressure and would just piss out a stream with no atomization.
I sent them to this shop with instructions to let me know what his findings was on each individual injector.
Several days/week later the box of injectors was returned, they didnt even call for a method of payment so I called and the secretary/wife I believe, said Joe was out of the shop for a couple of days doing some work out of town, so, I never got an answer to what was going on with each injector.
I did run each injector through the test procedure and every one of them was functioning perfectly and popping and chattering at exactly 1950 PSI.
How He was able to get each injector so close is something I cant figure out, at least not without taking hours in each injector.
That wont happen because all He charged at that time was ten bucks a pop.
He must have an endless supply of various thickness of shims and a mighty good idea what it takes for each PSI variation and what shim to poke in there to het each injector to that reading.
I will never again trust a new injector.
Quad Star had some that was balanced, now no longer on their web pages.
I think even those I would run through a test cycle just to be sure.
Yesterday, talked to Joe. He said send them over.
A small flat rate USPS shipping box, a zip lock gallon baggie with a blue shop towel with injectors inside it and folded over, a trip to the post office and $11.00 and had them sent off in the mail.
They will be there tomorrow/Friday. He said two to three days and he would have them back in the mail. I am expecting them back before the end of next week. The time it takes is nothing compared to what a faulty injector can do to an engine.
If the price has gone up from that ten bucks I will post it up.
I think that the only reason there is not more engine problems with faulty injectors is the fact that the injection pumps push out a limited amount of fuel on each cycle, and it is over that 1950+ PSI. Even though it is just a squirt instead of an atomized shot of fuel, the limited supply keeps the circumstances from burning holes in more pistons.
I might be wrong on the theories and I would like to hear if I am, but, lets not clutter this thread any more than it already has been and start a new thread on the topic.