Going for a Checkup
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More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
Going for a Checkup
I am having an issue with a belch of blue smoke on startup(I have been watching the recent thread). Also having the black cloud pulling away from a stop. If it is a momentary stop at a stop sign the smoke is not bad-stoplight equals smoke. I try to feather the throttle to minimize this. I am going to a local Diesel shop for a Diagnostic Tuesday. They said they would check over whatever it is that I have concerns about.
I can think of three things I want checked, but I don't want to miss anything for my $125. First, is an Uncompensated power balance for the injectors. Second, turbo operation ( installed a new stock Garrett this year) and Third, EGR function (not deleted).
Am I missing anything? I have not noticed any other issues. Truck fires off immediately hot or cold and gets up and goes. I do have ~75 psi fuel pressure and the needle pulsates a little. I had this down to my Glowshift setup not being the most expensive option out there but.... So any suggestions are welcome as to what to have checked. Thanks
I can think of three things I want checked, but I don't want to miss anything for my $125. First, is an Uncompensated power balance for the injectors. Second, turbo operation ( installed a new stock Garrett this year) and Third, EGR function (not deleted).
Am I missing anything? I have not noticed any other issues. Truck fires off immediately hot or cold and gets up and goes. I do have ~75 psi fuel pressure and the needle pulsates a little. I had this down to my Glowshift setup not being the most expensive option out there but.... So any suggestions are welcome as to what to have checked. Thanks
Hotshot
Joined: Dec 2014
Posts: 17,827
Likes: 3,110
From: Jersey Shore
My Isspro fuel pressure using to "pulse". When disassembling my engine, I found one injector copper that looked a little "cooked", but not bad. Reassembled and now with a Glowshift fuel pressure gauge, no pulsing.
I would include a Relative Compression test too, while you're there, just to have the info.
I didn't have a code for my EGR valve, nor any indication of an issue when I had IDS. Changing it, though, cured by blue smoke issue.
I would include a Relative Compression test too, while you're there, just to have the info.
I didn't have a code for my EGR valve, nor any indication of an issue when I had IDS. Changing it, though, cured by blue smoke issue.
Thread Starter
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More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
My Isspro fuel pressure using to "pulse". When disassembling my engine, I found one injector copper that looked a little "cooked", but not bad. Reassembled and now with a Glowshift fuel pressure gauge, no pulsing.
I would include a Relative Compression test too, while you're there, just to have the info.
I didn't have a code for my EGR valve, nor any indication of an issue when I had IDS. Changing it, though, cured by blue smoke issue.
I would include a Relative Compression test too, while you're there, just to have the info.
I didn't have a code for my EGR valve, nor any indication of an issue when I had IDS. Changing it, though, cured by blue smoke issue.
I found my unison ring completely stuck so I thought the new turbo was going to eliminate the smoke- for a while anyway.
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
Have you watched your EBP and VGT% during operation? It should try and maintain 2.4psi EBP at idle once the truck is warmed up. Cold startup it begins at 3.4 and works its way down. I believe the Scangauge reads EBP in absolute pressure so you'll have to subtract the 14.7 for atmospheric pressure (varies based on your altitude, 14.7 is sea level).
My truck usually is running around 65-70% VGT to maintain the 2.4psi at idle. If you are out of whack that could indicate issues with the vanes or an exhaust leak of some kind. I accidentally indexed my turbo vane actuator rod incorrectly so the vanes wouldn't close all the way and I was getting super low EBPs and the VGT was pegged at 85% most of the time.
My truck usually is running around 65-70% VGT to maintain the 2.4psi at idle. If you are out of whack that could indicate issues with the vanes or an exhaust leak of some kind. I accidentally indexed my turbo vane actuator rod incorrectly so the vanes wouldn't close all the way and I was getting super low EBPs and the VGT was pegged at 85% most of the time.
Thread Starter
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More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
Have you watched your EBP and VGT% during operation? It should try and maintain 2.4psi EBP at idle once the truck is warmed up. Cold startup it begins at 3.4 and works its way down. I believe the Scangauge reads EBP in absolute pressure so you'll have to subtract the 14.7 for atmospheric pressure (varies based on your altitude, 14.7 is sea level).
My truck usually is running around 65-70% VGT to maintain the 2.4psi at idle. If you are out of whack that could indicate issues with the vanes or an exhaust leak of some kind. I accidentally indexed my turbo vane actuator rod incorrectly so the vanes wouldn't close all the way and I was getting super low EBPs and the VGT was pegged at 85% most of the time.
My truck usually is running around 65-70% VGT to maintain the 2.4psi at idle. If you are out of whack that could indicate issues with the vanes or an exhaust leak of some kind. I accidentally indexed my turbo vane actuator rod incorrectly so the vanes wouldn't close all the way and I was getting super low EBPs and the VGT was pegged at 85% most of the time.
Thread Starter
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More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
Have you watched your EBP and VGT% during operation? It should try and maintain 2.4psi EBP at idle once the truck is warmed up. Cold startup it begins at 3.4 and works its way down. I believe the Scangauge reads EBP in absolute pressure so you'll have to subtract the 14.7 for atmospheric pressure (varies based on your altitude, 14.7 is sea level).
My truck usually is running around 65-70% VGT to maintain the 2.4psi at idle. If you are out of whack that could indicate issues with the vanes or an exhaust leak of some kind. I accidentally indexed my turbo vane actuator rod incorrectly so the vanes wouldn't close all the way and I was getting super low EBPs and the VGT was pegged at 85% most of the time.
My truck usually is running around 65-70% VGT to maintain the 2.4psi at idle. If you are out of whack that could indicate issues with the vanes or an exhaust leak of some kind. I accidentally indexed my turbo vane actuator rod incorrectly so the vanes wouldn't close all the way and I was getting super low EBPs and the VGT was pegged at 85% most of the time.
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
Yes that is close enough. Looks like that part is working correctly.
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Thread Starter
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More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
UPDATE:
The shop did not have the software to do a relative compression test which was disappointing. I did get an uncompensated power balance test. The injectors are very healthy. It was a dead straight line EXCEPT for number 3. It was just ever so slightly up... not down. This may be the one causing my fuel pressure needle to pulsate. When I get time I am going to reseal injectors. At least on that side. The possible smoking gun (haha) on my smoke from a stop is that the EGR valve failed the test. Needs to be replaced. I will update when I get the new valve and do some runs.
The shop did not have the software to do a relative compression test which was disappointing. I did get an uncompensated power balance test. The injectors are very healthy. It was a dead straight line EXCEPT for number 3. It was just ever so slightly up... not down. This may be the one causing my fuel pressure needle to pulsate. When I get time I am going to reseal injectors. At least on that side. The possible smoking gun (haha) on my smoke from a stop is that the EGR valve failed the test. Needs to be replaced. I will update when I get the new valve and do some runs.
Thread Starter
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More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
Just want to wrap this up. Had a chance to make a few runs with the new Alliant Power egr valve from Ed at Ficmrepair installed. The smoke at startup is now minimal and the black clouds from a stop are gone. I think the amount of smoke I have left can be attributed to the Atlas 40 tune on the ficm. and just the nature of the beast. Anyway, I am happy with the results. I went with the Alliant Power for the cost savings. I figure Ed will stand behind it if it decides to act up.
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