engine vibration

[JBCumminatya]

Replaced the CKP sensor today.



About a week ago, Cummins NW did a diagnostic and found a bad CKP sensor. Since that time, the engine has been idling not as smoothly as before. Before going to Cummins NW I had plenty of "smooth" power except when tach went to zero. Still idles roughly even after new CKP sensor. Anyone have any ideas?





Fuel filter was replaced 2,000 miles ago!

 

[BigDaddy]

I can't comment on the vibration, but from what I have read (and I'm sorry to say) it sound's to me that they (Cummins) may have installed a bad CKP or you have a loose connection.



Check the connection and go from there.



Hope this helps.

 

[JBCumminatya]

BigDaddy,



I replaced the CKP sensor myself. The engine vibration started after the Cummins tech performed his diagnostic test to check for codes. Just seems like an odd coincidence that a second problem happens after trying to correct the first.

 

[BigDaddy]

I have received new components in the past that have been defective.



In this situation, basic troubleshooting says to evaluate/confirm the last work performed. Is it possible that you got a bad CKP sensor?

Fuel filter was replaced 2,000 miles ago!

On a side note (and taking a shot in the dark), I once had a slight miss and jittery tach at idle. After isolating all my related aftermarket products, and reviewing many threads, I could not determine the cause and was set to go to the stealer for what I thought was "CKP". As luck would have it, I could not get in for a week. In the mean time, I changed the Oil and fuel filter. Shazam, no more problems. That fuel filter only had 5K miles on it and I drain my Fuel/water separator at every fill up and fuel up at the Pilot religiously.



Just some food for thought

Fuel filter was replaced 2,000 miles ago!

 

[Cliffman]

Ok, what the heck is a CKP sensor?

 

[JBCumminatya]

Hey, BigDaddy





Guess what! I replaced the fuel filter this morning. No more engine vibration or loss of power!!! Went on a trip up to Mt. Hood to go snow shoeing. mpg are up to where they use to be . It's good to be behind a Cummins again.

 

[JBCumminatya]

Cliffman,



A CKP sensor is a crankshaft position sensor. Found out about this sensor in the Daimler Chrysler service manual for my model year truck. Big, thick, orange book. Couldn't live without it.

 

[BigDaddy]

JBC,



I am glad it worked out for you



Happy Truckin