12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

14 MPG Please Help!!

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Old Feb 25, 2010 | 03:12 PM
  #1  
spetersen502's Avatar
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Default 14 MPG Please Help!!

When I stomp on the throttle my turbo does not spool for a while its extremely dawgy off the line and only is pushing 27-30 pounds of boost, on top of all that Im only getting around 14 MPG so I know there is something wrong any replies are better than none thank you and if you know anything just reply or send me a PM Thanks Guys
 
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Old Feb 25, 2010 | 03:25 PM
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wes-cummins's Avatar
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27-30 psi is a quit of bit for stock turbo, check boost leaks.
 
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Old Feb 25, 2010 | 03:55 PM
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TwinStackPete379's Avatar
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check fuel pressure and for fuel leaks. x2 on check for boost leaks.. Whats all done to your truck?. if ya would fill out your sig so we know what were working with
 
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Old Feb 25, 2010 | 05:25 PM
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what is done to the truck?
 
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Old Feb 25, 2010 | 08:16 PM
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wisconsin redneck's Avatar
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fill out you sig and let us know whats all done to it! for all we know you could have an hx35 or an hx 50!..... if its a stock turbo that sounds kinda high psi without messing with the wastegate... i can only peg 25 with my brand new stock hx35.... and how long is "extremly" it should only takes me 1 or 2 seconds for my turbo to spoll... but it all depends on how much fuel yer runnin and how big or small yer turbo is!
 
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Old Feb 25, 2010 | 08:46 PM
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Ok boys i got a number five fuel plate and a four inch exhaust turbo back witht the stock turbo a hx35. Its an automatic with 138,000 with Four Wheel Drive and yea i do have gauges.
 
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Old Feb 25, 2010 | 08:58 PM
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wisconsin redneck's Avatar
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sweet now just put that in your sig and youll be good to go..... yeh that seems like a lotta boost for a stock hx35...... how long does it take for the turbo to spool up? and does it smoke? and if so what color smoke?
 
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Old Feb 25, 2010 | 09:57 PM
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Default The Funny Part

well i can stomp on the gas and about 2 to 3 seconds its spools but here is the funny thing i just got done doing a KDP myself and before i did it i was pushing 42 Pounds of boost and my EGT was about 1400 now i can barely get 30 and my EGT is not even 10 you think i might of got the timing off a little bit
 
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Old Feb 25, 2010 | 10:52 PM
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joey's Avatar
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I am about to do my timing because i only get 13.7 everytime it never changes.
 
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Old Feb 25, 2010 | 11:16 PM
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12valvetater's Avatar
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I think your boost gauge is wrong 42 pounds is alot for just a #5 plate and a 180 pump stock.
 
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