Ok not only am I new to this site, but also new to the diesel world. I bought my 05 cummins about 2 months ago and just recently I started having problems with it. The short story is that from 40-50 MPH at about 1200-1500 rpms I started getting a shuddering and as soon as a load was put on it like climbing a hill it started backfiring and I could not speed up. The shuddering just got worse. I pulled over, shut it off and started it back up and it ran fine for a while. Then it came back a week later and now it feels like it will do it all the time from 30-55 mph unless I keep the RPM's up. Any ideas out there?
05 cummins shuddering and white smoke
- Thread starter foxcowboy
- Start date
dangerous06
diesel tech
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- Mar 24, 2008
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- 3,564
White smoke unburnt fuel! How many miles on it? Fuel filter lately?
WUnderwood
Moderator
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- Aug 10, 2006
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- 8,418
fuel pressure?
SPEEDSHIFT
New member
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- Jan 30, 2007
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- 5,978
Sounds like a pressure relief valve on the rail or an injector. Get a scanner on it and check rail pressure as it starts its "fit". If it drops you have a high pressure leak.
Thanks for the ideas. I have all my gauges but have not had a day to invest to put them all on yet. I was hoping its just a fuel pump since the white smoke isn't constant (I heard that if it was injector related I would have barrels of white smoke all the time) so I was going to check my fuel pressure with that gauge and see what it was reading at. Thanks again for giving me ideas though.