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94-98 PowertrainDiscussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING
I'm still trying to figure out what's wrong with my 12v. Its a 95, 175hp motor. All stock other than the stock plate slid forward a bit and the starewheel turned forward a bit. Did this before and after I did those mods.
It sounds like one cylinder is really weak or not firing much at all. Its not as noticeable at idle, but as soon as there's a load on the motor its very obvious. Enough that it shakes the truck. As the rpms go up it still does it but by 2000 rpms its barely noticeable, but still there.
Here's a video. Its from my phone so quality isn't the best but you get the idea.
Truck is parked til I get it fixed. Plan for now is to pull the injectors and have them tested and reset the pop pressure. Any other thoughts?
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
Just for laughs, take a 19mm wrench and loosen the injector lines at the pump one at a time while its running. see if all of them are shooting the same amount of fuel and it should be easy to pinpoint the problematic cylinder.
If you find that one of the delivery valve holders tries to spin when you try to loosen the injector line, its VERY likely that you have a broken barrel.
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2007 Laramie 3500, 4.5" RevTek, 35x12.5 ProComp MTRs, buckstop front+rear, bullydog TD, BD RFI intake, Lightforce 140s in the bumper, 240HIDs up top
1997 SLT 2500, 5.5" fabtech, 36x13.5 IROKs, 5x12s, s300, 4kgsk, inj pump FUBAR
See if the video works now. I can never get it right from my phone.
Ill try what you said.
Is it going to hurt it to drive it as is? I might take it to a shop if it is something pump related. I've never messed with dv's before.
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
And yes its not a great idea to keep driving it like that, it creates huge amounts of torsional vibration on the crankshaft.
If you do find that one of the DV holders appears loose, and you can turn it in by hand a couple of turns, thats a dead giveaway of a split barrel. It is not a repair you can do yourself, so dont even worry about that!
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2007 Laramie 3500, 4.5" RevTek, 35x12.5 ProComp MTRs, buckstop front+rear, bullydog TD, BD RFI intake, Lightforce 140s in the bumper, 240HIDs up top
1997 SLT 2500, 5.5" fabtech, 36x13.5 IROKs, 5x12s, s300, 4kgsk, inj pump FUBAR
Yeah its gotten worse over the last thousand miles or so. When I first fired up the motor and started driving it (in the Chevy) it barely did it at all. I assumed it was normal at first because it was so faint. But it has steadily gotten worse. Its also a little worse when the motor is cold too. Not sure if that means anything though.
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
Ok. Last night I tried unscrewing the injector lines off the pump one at a time. None of them tried to spin the dv holders or anything. They all came off normally. Seemed like cylinders 1 and 3 made the least bit of change when I loosened the hold down bolts. The misfire got more pronounced but there weren't multiple misfires like there were on 2, 4, 5 & 6.
All seemed to spit out about the same amount of fuel. Hard to tell if there's any real difference though.
Does that help anyone figure out what's going on?
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
Any help? Ill have some money to start getting it worked on next week, but I'd like some ideas of where to start so I'm not throwing my money away.
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
It hasn't yet. I wouldn't be surprised if it'd slipped a tad but not much as I don't get a ton of blue or white smoke at idle. Only a little for the first 10 seconds or so when the motor is started when its cold.
Its basically just got a misfire on a cylinder but I don't know how to determine the cause.
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
Bump for more ideas! Still thinking about pulling the injectors and sending em out to be tested and have the pop pressures reset.
Sent from my phone, probably while driving and eating a sammich
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04 Chevy CCSB LB7 Dmax. Intake, Exhaust, EFI Live
'95 Chevy ECLB 2wd with a P-pumped 12v/NV4500. The normal pump tweeks, timing at 15.5*. 23+mpg
my timing is advanced and does the same thing. but from 2000-3400rpms it sounds smooth.
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THE NEW TRUCK...1997 white dodge cummins 2500 sport. 62/65/12, ats 3 piece exhaust manifold , afe stage 2, 4000gsk, 60lb springs, no plate, 5x.012, 3"carlie lift. built nv4500.
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