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CTD shaking/vibrating... DV's?


This is a discussion on CTD shaking/vibrating... DV's? within the P Pump forums, part of the Dodge Ram Cummins Diesel Forum category!
I don't know how many of you guys know 12V's but I have a 94.... The truck in my sig... ...


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Old 01-25-2012, 03:51 PM   #1 (permalink)
 
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Default CTD shaking/vibrating... DV's?
I don't know how many of you guys know 12V's but I have a 94.... The truck in my sig... When i bought the truck I noticed that the truck would start shaking or vibrating heavily in 5th gear when i get down around 40 MPH. I figured it was just because it was lugging it slightly. When i pushed into the pedal a little bit more it would clear up and power through it. I recently put 75 HP injectors in the truck from DDP and it has gotten a little worse. it will do it even at 45 MPH and when its cold even at 50 MPH, but it doesn't only happen in 5th gear now either. In 4th you can sometimes feel it but not as severe. It also seems to cackle a lot in the lower RPM range from around 1000 to 1400 but i think the cackle is just because of the exhaust that I am running... I remember hearing somewhere that Delivery Valves helps take away chatter (shaking/vibration?) with bigger injectors and didn't know if this was the same problem that they were talking about because it happened BEFORE i had my injectors too... it makes the truck more of a nuisance to drive, especially when the truck is colder. Any personal experience or knowledge is greatly appreciated!

Thanks


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'94 2500 Cummins! NV4500 5spd, 3.55's DDP STAGE 2 75HP INJECTORS Fuel Plate and silencer ring gone with starwheel cranked and 18* of timing.. homemade 6" stack Guages(boost pyro and trans temp)! More to come....
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Old 01-25-2012, 09:37 PM   #2 (permalink)
 
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Struggling for fuel , you need a lift pump . Bigger injectors are going to make it worse ... If not kill the stocker . Sounds like the stocker was going south anyway .

I think I told you this at one point

Now this is just a guess from riding in your truck . Putter putter sputter sputter ..I NEED FUEL
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Old 01-26-2012, 10:50 AM   #3 (permalink)
 
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Check your fuel pressure... P7100 pumps are known for having weak overflow valves and losing fuel pressure...

Mopar1973Man's Dodge Cummins Articles - P7100 Injection Pump - Fuel Pressure

Also remember stock lift pumps are not efficent pumps for high performance then tend to come up short at high RPM's...

Technical Article Number One- The Cummins Lift Pump


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Old 01-26-2012, 03:09 PM   #4 (permalink)
 
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What I said but in a more technical term ^
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Old 01-26-2012, 03:29 PM   #5 (permalink)
 
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Then wouldnt it get worse in the higher RPM range instead of clearing up? that doesnt make sense...


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'94 2500 Cummins! NV4500 5spd, 3.55's DDP STAGE 2 75HP INJECTORS Fuel Plate and silencer ring gone with starwheel cranked and 18* of timing.. homemade 6" stack Guages(boost pyro and trans temp)! More to come....
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Old 01-26-2012, 04:10 PM   #6 (permalink)
 
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With a load there is more need for fuel .

Your truck NEEDS more fuel in lower gears than top end . Taking off from a dead stop requires more fuel as the truck / motor needs to get going . At top end it already has the mass moving so less fuel is needed .
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Old 01-26-2012, 04:17 PM   #7 (permalink)
 
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does it smoke when you're experiencing this issue? If so, is it black or white/gray smoke?


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Old 01-26-2012, 04:23 PM   #8 (permalink)
 
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Greyish last time I seen it
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Old 01-26-2012, 04:26 PM   #9 (permalink)
 
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That's definitely a fuel starvation then. Mine smoked gray when the lift pump was going out, and stuttered like hell.

per Tapatalk on my EVO


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'97 ECLB DRW 5.9L Cummins - #0, BHAF, 4" Diamond Eye TBE - Built 47RE
'01 QCSB 5.9L Cummins - 6speed, Edge Juice w/Attitude, BHAF, 5" Diamond Eye TBE
'96 SCLB 5.9L Cummins - #10, BHAF, 4" DP, 7" Miter Stack, Leveler, 4500, M275s, Jake
'03 QCSB 4.7 2WD - all original, 98k mi., dual exhaust - My late father's truck. RIP, pops! 4/11/36 - 3/26/11
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Old 01-26-2012, 04:27 PM   #10 (permalink)
 
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Both my 12 and 24 valves did

per Tapatalk on my EVO


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'97 ECLB DRW 5.9L Cummins - #0, BHAF, 4" Diamond Eye TBE - Built 47RE
'01 QCSB 5.9L Cummins - 6speed, Edge Juice w/Attitude, BHAF, 5" Diamond Eye TBE
'96 SCLB 5.9L Cummins - #10, BHAF, 4" DP, 7" Miter Stack, Leveler, 4500, M275s, Jake
'03 QCSB 4.7 2WD - all original, 98k mi., dual exhaust - My late father's truck. RIP, pops! 4/11/36 - 3/26/11
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