 |
|
 |
 |
        |
 |
|
|||||||
| Register | FAQ | Forum Rules | Calendar | My Replies | My Threads | Mark Forums Read | Auto Escrow | Auto Loans |
 |
|
|
LinkBack | Thread Tools |
11-19-2012, 09:23 PM
|
#31 (permalink) |
|
AFAWK...LOL
 
Join Date: Oct 2009
Location: lac superieur, quebec
Posts: 4,594
iTrader Score: 10 reviews
Old School Oil Burners (Old SOBs) Member Quebec/Labrador Diesel Place Chapter Member |
If you have unburnt fuel, turning the pump up more, will not fix this. Turning the pump up will not change whether or not the pump is creating enough pressure to pop injectors. The highest pop pressure that we seen is just over 3,000psi. These injector pumps create 10,000 psi, and is a wear issue between plungers and the rotor and the wear between the head and rotor. The common symptoms are erratic pumping (missing) and hard starting when pump is wearing out.
If your timing is still too advanced, you need to retard it a little more. The white smoke when you first start the truck, is improperly burnt fuel. As the truck warms up, this smoke clears. When running on the highway, pump will be advanced due to housing pressure increase due to rpm's (internal charge pump) If pump is too far advanced, the fuel is being injected before the cylinder compression is at optimum to burn the fuel. You could have the scenario very similar to when truck is warming up. Retard the timing a little more, until you have a noticeable stumble when pressing the advance lever on the side of the pump. Do a couple more runs with it retarded another dimes width and give us news.
__________________
1992 GMC "Rattle-Puss",DRW,RCLB, 4l80e.. 599 casting 6.2l, bored .080", mystery pump, modded injectors, holset pro 40w( t-3,comp. 56/83 billet wheel,turbine 76/64/16WG), carter lift pump, bankspower exhaust mani, front crossover, coolant mods, prototype buddy 3 banger tranny tune, WMI, only a work truck....  1987 wolfsburg jetta gt"wiener schnitzel", 1.9l IDI AAZ casting, 2.5" exhaust, custom CAI, 38.5 mpg with a lead foot  ... search for more fuel has begun....STARTED THE BUILD...1988 chevy shortbox"lepreauchaun" 17:1 compression, cement filled 660 6.2l, fire-ringed, db2835 IP, marine injectors, centre mount compound turbos Building power....."Sanford and son style" member #1 of the dinosaur fan upgrade member "934" of the 3500 dually club.... say no to products made in the "chinited states of chinerica" Jim&Jeff...  Last edited by turbonator; 11-19-2012 at 09:35 PM. |
| Offline |
|
| Sponsored Links | |||
Advertisement | |||
|
11-19-2012, 09:58 PM
|
#32 (permalink) |
|
Diesel Enthusiast
Join Date: Oct 2012
Posts: 21
iTrader Score: 0 reviews
|
Will try to retard the timing a bit and get back to you. Thanks a ton for all your great suggestions, fellas!
__________________
91 Chevy g-30 box van. Unmodified 6.2 Diesel with 4l80e tranny. Thinking about turbo....  Good times rolling in my custom small rv all over the country
|
| Offline |
|
|
11-19-2012, 10:08 PM
|
#33 (permalink) |
|
AFAWK...LOL
Join Date: Oct 2009
Location: lac superieur, quebec
Posts: 4,594
iTrader Score: 10 reviews
Old School Oil Burners (Old SOBs) Member Quebec/Labrador Diesel Place Chapter Member |
break out your big screw-driver and have at her....
__________________
1992 GMC "Rattle-Puss",DRW,RCLB, 4l80e.. 599 casting 6.2l, bored .080", mystery pump, modded injectors, holset pro 40w( t-3,comp. 56/83 billet wheel,turbine 76/64/16WG), carter lift pump, bankspower exhaust mani, front crossover, coolant mods, prototype buddy 3 banger tranny tune, WMI, only a work truck.... 1987 wolfsburg jetta gt"wiener schnitzel", 1.9l IDI AAZ casting, 2.5" exhaust, custom CAI, 38.5 mpg with a lead foot ... search for more fuel has begun....STARTED THE BUILD...1988 chevy shortbox"lepreauchaun" 17:1 compression, cement filled 660 6.2l, fire-ringed, db2835 IP, marine injectors, centre mount compound turbos Building power....."Sanford and son style" member #1 of the dinosaur fan upgrade member "934" of the 3500 dually club.... say no to products made in the "chinited states of chinerica" Jim&Jeff... |
| Offline |
|
|
11-19-2012, 10:31 PM
|
#34 (permalink) |
|
Diesel Enthusiast
Join Date: Oct 2012
Posts: 21
iTrader Score: 0 reviews
|
obvious/stupid question: which way do I rotate the pump compared to the engine to retard the timing? I've found directions online that mention both ways to advance
Thanks! stephen
__________________
91 Chevy g-30 box van. Unmodified 6.2 Diesel with 4l80e tranny. Thinking about turbo.... Good times rolling in my custom small rv all over the country
|
| Offline |
|
|
11-19-2012, 11:38 PM
|
#35 (permalink) | |||
|
Diesel Master
Join Date: May 2007
Location: Manitoba, Canada
Posts: 1,255
iTrader Score: 0 reviews
Old School Oil Burners (Old SOBs) Member |
Quote:
__________________
1990 Suburban 1500 Silverado 4x4, in the shop is a possible 6.5? Turbo in the wings. Open plenum intake. 700 R4 Now Rebuilt + 241, NV4500+205 sitting in the shop. 10,000lb Trany Cooler With 10in pusher Fan and gauge. 8,000 LB Warn Multi Mount. TCC Lock up Control. 10's front and back, 60 front and 14 bolt rear real soon? 4" Lift and 31 10.50's. Many twisted drive shafts F&R. Manual and auto high idle. Heated Fuel lines. Enough lighting to make day light Old SOBs member #26 Quote:
Quote:
|
|||
| Offline |
|
|
11-23-2012, 05:45 PM
|
#36 (permalink) |
|
Diesel Enthusiast
Join Date: Oct 2012
Posts: 21
iTrader Score: 0 reviews
|
update:
Sweet! So drove to for 14 hours the other day with a good bit of white. Finally figured out how to get to that 3rd injection pump bolt (just had to remove one of the oil pump brackets so I could turn my wrench). Turned to pump to passenger side about 1/16 of an inch (dimes' width). Drove for 10 minutes after retarding...seems to be much better in terms of white smoke! YAY! It still only slows down when I push the advance arm, so I may try to go farther with it in a few days to see what happens. What will I see if I go to far? I do want it to stumble a bit when I push on that advance arm, right?
Thanks for everything guys! Stephen
__________________
91 Chevy g-30 box van. Unmodified 6.2 Diesel with 4l80e tranny. Thinking about turbo.... Good times rolling in my custom small rv all over the country
|
| Offline |
|
|
11-23-2012, 10:17 PM
|
#37 (permalink) | ||
|
Diesel Master
Join Date: May 2007
Location: Manitoba, Canada
Posts: 1,255
iTrader Score: 0 reviews
Old School Oil Burners (Old SOBs) Member |
Retard the timing a little more, until you have a noticeable stumble when pressing the advance lever on the side of the pump.
__________________
1990 Suburban 1500 Silverado 4x4, in the shop is a possible 6.5? Turbo in the wings. Open plenum intake. 700 R4 Now Rebuilt + 241, NV4500+205 sitting in the shop. 10,000lb Trany Cooler With 10in pusher Fan and gauge. 8,000 LB Warn Multi Mount. TCC Lock up Control. 10's front and back, 60 front and 14 bolt rear real soon? 4" Lift and 31 10.50's. Many twisted drive shafts F&R. Manual and auto high idle. Heated Fuel lines. Enough lighting to make day light Old SOBs member #26 Quote:
Quote:
|
||
| Offline |
|
| Sponsored Links | |
Advertisement | |
| Sponsored Links | |
Advertisement |
|
|
| Thread Tools | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| PENSACOLA FUEL INJECTION - Injector Install, Now Issues!! | mcd176 | Duramax First Generation: 2001-2004 (LB7) | 5 | 09-19-2012 09:33 PM |
| Fuel mileage versus injector issues | durabluecrew | Duramax First Generation: 2001-2004 (LB7) | 4 | 03-11-2011 10:23 PM |
| Fuel issues, need injector pump rebuilt......? | eric_banks32 | 6.2L Diesel Engine | 3 | 10-21-2010 12:19 AM |
| Any way to check injector size in lb7 without pulling injector | Duramaxallison08 | Fuel System, Air, Exhaust, & Emissions Upgrades | 2 | 08-30-2010 12:03 PM |
| Fuel Additives vs. Injector Issues | a bear | Duramax First Generation: 2001-2004 (LB7) | 38 | 12-02-2004 10:48 PM |
