Diagnosing DII cranking, but not starting

[juha_teuvonnen]

My 1999 Discovery II that ran a couple of weeks ago decided not to start. I checked the fuses and they look be ok. The car cranks, and it does crank pretty fast, but does not start.

I am thinking I should check spark first, then check fuel. Or may be spray some staring fluid while cranking? In the latter case, should I open up the airbox and spray after the air filter, but before MAF?

 

[wheelen disco]

If you don't have any codes, I'd say its the ckps

 

[Devildog01]

I'd bet crank position sensor....

 

[juha_teuvonnen]

If you don't have any codes, I'd say its the ckps

Is it possible to pull codes if the car does not start? Will a vanilla OBD II code reader do?

 

[juha_teuvonnen]

I'd bet crank position sensor....

Starter fluid in the intake manifold made no difference, pulled a couple of plugs, - looks like no spark. The plugs and wires have clearly seen better days too.

 

[mbrummal]

If you don't have any codes, I'd say its the ckps

I'd bet crank position sensor....

they are right.

 

[slowNstdy]

I'd bet crank position sensor....

X4...... even if you sprayed gas down the intake its not gonna crank.... if the crank doesnt know where its at it wont fire! Be thankful of that.

 

[alenz]

My 99 DII just had to have the crank position sensor replaced about 6 months ago. Mine acted the same as yours. It would turn over but not fire up. cost about $85 for the part and almost 200 for the labor.

 

[ljdiscovery]

I just did mine a couple of weeks ago. Came out of the complete blue. Made a quick trip to Costco and when I came out it didn't want to start. Finally fired up, got me part of the way home and it died. Luckliy pulled into a driveway and 5 minutes later, it started up again. Got it home, and picked up a crankshaft position sensor. Took about 45 minutes to remove the old one and install the new one. It has run like a champ since. I did a complete write up on Land Rover Forum under the DII section. There is also a youtube video of the procedure, but he makes it look a lot easier than it turned out to be. Access is very, very tight, unless you have arms and hands like a spider monkey. Good luck. (by the way, I got my part at the local LR dealer for $76)

 

[mlnnc]

To answer the OP's earlier question, yes, any stored codes can be read even if the truck will not start, and yes, a vanilla OBD II will work fine. The ignition needs to be in the ON position but the vehicle does not need to be running.

But the point is that a bad CKP sensor often does not trigger any codes. In fact, the symptoms you describe with no SES light is sort of a code itself.

My CKP sensor crapped out on me a week and a half ago. Unplugging it from the harness between the rear of the engine and the firewall and then reattaching it took the most time by far. Changing the sensor itself was easy with a standard, 1/4" drive ratchet and 7mm and 8mm sockets, but you'll want the exhaust cold to reach up there and do the work.

My new sensor came in a Duralast box from Auto Zone but the sensor itself was marked Bosch. The price was $59.99; part number SU5570. If you can wait a day, Will was selling them for $35 delivered a while back.

 

[brianhoberg]

check the ckps. it will jack with you if it's going out. No real way to "patch" it from what I've seen. Just replace it and be done.

 

[roverdriver77]

My 2000 Disco has been reported to have been acting strange now for a couple of weeks. Wife drove it and said that it wouldn't start so I went out in my Series III to rescue her and it fired right up. I drove it for the next week and no problems so I wrote it off as a "user error". No codes. Tonight my son went out with it and coasted to a stop on the highway. Came home and I got the code P0335. Crank position sensor. Will fix Monday.

 

[juha_teuvonnen]

Replaced Crankshaft position sensor, SES light on, still does not start. What's next, read codes?