Check Engine Light and Loss of Power
Started my 06 CRD in 45 degree whether and immediately noticed the idle sounded off, not quite low/deep enough. I watched the RPMs fluctuate mildly for about 20-30 seconds before it seemed to stabalize (it still didn't have its normal deep rumble).
I thought I noticed some power loss, but didn't try to give my CRD some gas till I got out of my neighborhood. I turned onto a 55 MPH road, gave my CRD a heavy foot on the gas pedal, and then *DEEP THUNK*. Sure enough, I had almost zero acceleration and it took me a while just to get in 45-50mph and couldn't go any faster.
Stopped at the grocery store where I was heading. Turned the car off for 10 min. When I drove home, same issue except this time I noticed the check engine light (it's possible it was on before but I didn't notice as I was concerned with the road and not killing myself while underpowered).
I took it to a look advanced auto and they could not pull any code for the check engine light. Oh, for a couple weeks I had a "LoCool" dash flashing light. This is still happening as well.
Any ideas? I think it might be a fuel pump, but I really don't know much. Thank you!