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Help Support Hardline Crawlers :
Diesel engine sluggish
- Thread starter Jduck
- Start date
drich394
www.davesoffroadsupply.com
Jason, dont know if you have looked at the CPS-- i just swapped mine out on the 7.3 and wow did it clear up some lagging and small jerk at higher speeds- mine was acting slower and slower after the new engine install - swapped the pedal assembly out with no help and then did the CPS- its a live!!! running great and tons of pep even with my tuner on ECO
BIG_Country
Well-Known Member
sounds like your injectors might be wearing out, or you got some trash that got passed the fuel filter. If the injectors are bad, make sure you change all of them. Had a diesel place just change the bad ones in a 5.9HO and within one year they all burned out again from unequal injector PSI. If it's trash try some Power Service, it works pretty good at cleaning up trash in fuel.
SHELBS44
Frosty beverages and HL2 FTW
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BIG_Country said:
Yep. But a good scan tool with show you contribution rates and show what's going on. I'm not a fan of just doing 1-2 injectors. Do them all of ones bad. In the end it's worth it so you have no worries
Craig_c
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Diesel Kleen/Hot Shot/etc really won't do anything for a common rail cummins injector. They do not use oil to open the injector like a Ford, which those products can sometimes help. Once a common rail injector is worn it's worn. Good filtration is the key to keeping them alive longer. The Fass/Airdog pumps have nice filters, but you can do that on your own with a Cat or Cummins/Fleetgaurd filter on a standard filter base to get the filters down below 10 micron. Bosch recommends below 10 micron filters but the factory Dodge/Cummins filter is far from it!
Being a common rail, it's basically a fuel injected gas engine running a different fuel with ALOT higher pressures. You could have a High pressure pump just getting weak, which at your mileage isn't uncommon. However, as these engines are all electronic, a bad ground is not a good thing at all. I've not seen it on a common rail engine, but have seen a lot of the VP 24valve engines have a bad MAP sensor that will not throw a code, but limit engine power because they are not reading boost/intake pressure. The add on tuners I'm not a fan of, I have an Edge EZ I took off my truck because of similar reasons.
Being a common rail, it's basically a fuel injected gas engine running a different fuel with ALOT higher pressures. You could have a High pressure pump just getting weak, which at your mileage isn't uncommon. However, as these engines are all electronic, a bad ground is not a good thing at all. I've not seen it on a common rail engine, but have seen a lot of the VP 24valve engines have a bad MAP sensor that will not throw a code, but limit engine power because they are not reading boost/intake pressure. The add on tuners I'm not a fan of, I have an Edge EZ I took off my truck because of similar reasons.
