Diesel Bombers SIGN UP NOW

National Association of Diesel Motorsports
Go Back   Diesel Bombers > Dodge Cummins > 1st Generation Dodge Cummins 89-93
Sign in using an external account
Register Forgot Password?
Search


Registered Members don't see these ads. Register now it's free!

1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

Welcome to Diesel Bombers Forums!
Welcome to DieselBombers .com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Diesel Bombers Forums community today!


I have a 92 Dodge D250 with no modifications other than an Air Dog Fuel Pump and all of a sudden I have no power and fuel mileage went from 19-20 miles to the gallon to 8 miles to the gallon.....I have to put the ... JOIN NOW TO REMOVE TRACER

Reply
 
 
 
submit to reddit
 
LinkBack Thread Tools Search this Thread
  #1  
Old 10-13-2011, 08:16 PM
Diesel Fan

   
View Member's Albums

Default Low Power, Fuel Mileage Drop - Help Please

I have a 92 Dodge D250 with no modifications other than an Air Dog Fuel Pump and all of a sudden I have no power and fuel mileage went from 19-20 miles to the gallon to 8 miles to the gallon.....I have to put the pedal to the floor just to get up a slight incline. Does this sound like a Turbocharger? Not sure what would effect me so dramatically like this..

If it is a Turbo and I need to change, any recommendations for replacement? Can I troubleshoot myself?

robinlbird's Sig:1992 Dodge Cummins (1st Gen) with no upgrades at this time.
Still trying to figure out where to start.
Reply With Quote
  #2  
Old 10-13-2011, 08:34 PM
NadirPoint's Avatar
Diesel Bomber
Status: Really?

   

Default

What's the engine doing (or not, as the case may be) when it is floored going up a slight incline? Miss, sputtering? Smoke? What color? Unusual noises or smells?

Gonna need alot more information to figure this out...
Reply With Quote
  #3  
Old 10-13-2011, 08:40 PM
Diesel Fan

   
View Member's Albums

Default

Originally Posted by NadirPoint View Post
What's the engine doing (or not, as the case may be) when it is floored going up a slight incline? Miss, sputtering? Smoke? What color? Unusual noises or smells?

Gonna need alot more information to figure this out...
Clouds of black smoke.....even on a straight level road I still have some smoke with no load...
Reply With Quote
  #4  
Old 10-13-2011, 11:02 PM
Diesel Fan

   

Default

check your air filter

mnwild_05's Sig:1992 DODGE D150, H1C 12cm exh and 60mm compressor, 3200 rpm spring, bully dog fuel pin, fuel screw in, throttle linkage adjusted, stage three ddp injectors, straight 4 inch, nv4500 with ceramic clutch, 3.21 gears, boost and exhaust gauge.
Reply With Quote
  #5  
Old 10-13-2011, 11:19 PM
NadirPoint's Avatar
Diesel Bomber
Status: Really?

   

Default

So it's getting plenty of fuel, but not enough air - major boost leak? Torn intercooler connector?

Don't push it too hard like that - EGT will be through the roof.
Reply With Quote
  #6  
Old 10-14-2011, 11:46 AM
Diesel Fan

   
View Member's Albums

Sad Air Filter

Originally Posted by mnwild_05 View Post
check your air filter
Replaced Air and Fuel Filters when it started....

---AutoMerged DoublePost---

Originally Posted by NadirPoint View Post
So it's getting plenty of fuel, but not enough air - major boost leak? Torn intercooler connector?

Don't push it too hard like that - EGT will be through the roof.
No turn connectors, don't know about a boost leak but is the turbo is no working at all that would be the same? Don't know what a "EGT" is but I was on a trip back to my home and had to drive 8 hours straight in this condition...couldn't get over 65 miles an hour on the level, about 55 mph on a grade blowing black smoke the whole time...

Last edited by robinlbird; 10-14-2011 at 11:46 AM.. Reason: Automerged Doublepost
Reply With Quote
  #7  
Old 10-14-2011, 06:01 PM
NadirPoint's Avatar
Diesel Bomber
Status: Really?

   

Default

Originally Posted by robinlbird View Post
...the turbo is no working at all that would be the same?
Well, yeah - if there's no boost to leak in the first place, that would give pretty much the same result.

Have you actually inspected the turbo itself yet?
Reply With Quote
  #8  
Old 10-14-2011, 06:07 PM
1arock's Avatar
Diesel Enthusiast
Status: legend in my mind

   
View Member's Albums

Default

EGT=exhaust gas temperature, I agree on a possible boost leak. Look all the rubber boots over real good and check to make sure none look as if they have moved on the piping I"ve seen the clamps fail. If there are no obvious leaks do an either check. Why do you suspect the turbo, is it making extra noise or some squealing sound which could also be a boost leak? Most turbo failures on stockish engines are oil leaks and not complete turbo failure. Rocky

1arock's Sig:"If you're gonna err, err on the stout side", my grandad. 1arock
Reply With Quote
  #9  
Old 10-14-2011, 06:58 PM
regor's Avatar
Diesel Fan

   

Default

i agree with them it has to be a boost leak the stock boots tend to dry and split

regor's Sig:92 ex cab, 3200 spring, denny t pin, couple of turns on the fuel screw, 02 dodge seats, K&N filter, 2nd gen turbo, 4" turbo back exhaust, push button start
83 Vw rabbit 5 speed diesel, pump turned up, file fitted rings, timing bumped and 50 mpg
Reply With Quote
  #10  
Old 10-14-2011, 07:24 PM
Diesel Fan

   
View Member's Albums

Default Boost

Originally Posted by regor View Post
i agree with them it has to be a boost leak the stock boots tend to dry and split
I can't find any evidence of a boost leak....I took the hose off of the intake and revved the engine and the pressure was enough it was hard to put my hand over it.....not sure how I would actually check the boost since it is a 2" line. Not sure how I would take a pressure reading to get exact measurements.??

Checked all of the boots (at Turbo, both sides of Radiator and at the intake).

Basically my theory that the turbo might be bad seemed to be false so I have no idea what to check next.
Reply With Quote
 
 
 
submit to reddit
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


 
All times are GMT -5. The time now is 02:49 PM.

Copyright And Legal Notice Links Of Interest

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Diesel Bombers ® - All Content Protected Under Intellectual Property Rights Law of Registered Trademarks
Reg. No. 3,494,401 Cls. 100, 101 & 104 Under Int. Cl. 38
USE AT YOUR OWN RISK WE HOLD NO LIABILITY FOR ANY CONTENT RIGHT, WRONG OR INDIFFERENT

Protected by Copyscape Duplicate Content Check