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

low boost

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Old 05-18-2012, 08:25 AM
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hi i just recently installed gauges and a 5 fuel plate. the highest my boost will get to is like ten or twelve. i looked at the boost line for the gauge and its kinked in three places the egts are normal and it feels like it still has good power. do you guys think the kinked line would cause the gauge to read so far off?
 
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Old 05-18-2012, 07:01 PM
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definitely would be your problem.
 
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Old 05-20-2012, 08:15 AM
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alright thanks any suggestions on what kind of hose i should replace it with ?
 
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Old 05-20-2012, 08:57 AM
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I would see if the company that makes your gauge has any replacements available.
 
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Old 05-20-2012, 09:12 AM
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tygon tubing works best and easily found in the stores

if yer boost is still low make sure to check every boot from the charger out..................the clamps always are loose
 
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Old 05-20-2012, 09:41 AM
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okay so im assuming ill need to get new pressure fittings to right?

---AutoMerged DoublePost---

could i find tygon tubing at oreillys or napa
 

Last edited by chen; 05-20-2012 at 09:41 AM. Reason: Automerged Doublepost
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Old 05-20-2012, 09:53 AM
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just get the black nylon DOT air brake like from napa that all ive ever used with no issues its more rigid than the clear stuff its available at napa
 
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Old 05-20-2012, 12:55 PM
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alright so i just bought the air brake line from napa installed it took it for a test run boost gauge still wont go above like 8psi??? any thoughts?
 
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Old 05-20-2012, 03:21 PM
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tighten all yer clamps on the boots from the chargeer to interccoler in and out then also to the intake horn........you have a leak

if it still shows no boost then yer wastegate is leaking or partially stuck open
 
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Old 05-20-2012, 05:49 PM
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Imma chime in on this thread instead of starting a new one. I just installed a boost elbow and i didnt notice any significant difference in boost once spooled and on spool up. Should I? Or does the elbow not really do much for boost..
 


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