All of a sudden it seems to take more cranking to start. It's not running rough or smoking just takes more cranking. It looks like it has the old part number fuel filter/heater unit- first generation I think its called. Is this a symptom of air getting in?

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2006 Limited Edition. GDE- Eco Tune. Crappy floor mats, no spare wheel cover

it would be worthwhile to update the filter assembly. Remove fuel heater connector and check for any sort of burnt/melted plastic. On fuel head closest to driver door.

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Providers of wholly developed aftermarket solutions for the KJ CRD.
(248) 977 - 9531

No evidence of burning on the connector.

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2006 Limited Edition. GDE- Eco Tune. Crappy floor mats, no spare wheel cover

Sometimes a weak battery will do that...... cranks fine but not enough juice to power the electronics.

From my experience, you need approx. 12.9 - 13.2 volts at the battery before cranking.

Get yourself a trickle charger at wally world. http://www.walmart.com/ip/Schumacher-XM ... p/15140193 ... and let the battery charge over night.

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

I had the same problem.
New battery helped but what really helped was a
lift pump under the hood.
I wired it into the existing wiring too.
Fires up right away every time.