Mackel wrote:
I am looking at purchasing a 2005 CRD with 24K miles. I test-drove it extensively, and noticed that when operating at constant speeds (i.e. no changes in throttle input) the RPM's "pulse" or "cycle" even on flat roads. This was observed at speeds ranging from about 20 to 40 MPH. I am worried that this observation may signal potential problems, possible due to fuel delivery, computer/software, or transmission issues.
Has anybody observed pulsing RPMs during steady-state driving conditions?
I've not noticed this driving without cruise control.
At the slowest speeds supported by cruise control the rpms can fluctuate a little. By the time it gets to 40 that goes away entirely. The RPMs stay rock solid except for serious inclines.
(If you want to see RPMs fluctuate big time you should see how my wife's anemic 4 cyl Saturn Vue drives. Horrific.)
_________________
Thanks,
Ken Jennings
2006 KJ Limited 4x4 CRD, Option Pkg G, Lt. Khaki, Built 1 Feb 2006
Tow Package for myself, EVIC TPM
Side Curtain Airbags for my daughter
http://www.kenjennings.cc/crd/dieselexp.html