I've got a 2000 24V and for the last few months I've experienced intermittent starting problems coupled with in-motion loss of tach function. Per the intermittent starts: I'll drive somewhere without any trouble, park, and when I return an hour or so later it won't start; the engine won't quite turnover. If I leave the truck for a few hours and then try again it'll crank right up. Per the loss of tach function: I'll be driving down the road and my check engine light will come on and my tach will go to zero. There is no apparent engine or transmission jump or jive at all.

I ran the trouble code and got P1693. I searched for threads concerning this on this board and found one, but it didn't offer a diagnosis.

Has anyone had similar troubles? A buddy that has had a few Dodges said it sounds like a cam or crank sensor. Does that make sense to anyone?

 

Cam or crank sensor.

I honestly don't rember if the 00 has a crank sensor or not...

I know the 98-99 do, and the 01-02 don't....

 

look on the front balancer see if theres a crank sensor there if so replace it

 

What do you mean it "wont quite turn over"? dead batterys? if they are discharged and sit for a while they will come back up and start the truck. from your description I'd check to make sure its charging

 

I'll be sure to check cam and crank sensors. Nickg - I've recently replaced both batteries and the starter. I'm not sure how to describe "not quite turning over" except to say: I used to drive a '65 Mustang and when it did what the truck is doing I would pump the gas and then it would crank. That was why my buddy said he thought it was a cam or crank sensor. He said one or both of those sensors would keep the injectors from activating at start-up. (Excuse my poor description but I'm fairly new to not only the diesel world but also the fuel injected world and the modern electrical system world. I'm used to carbs and no sensors.)

 

I have a 2000 and had intermittent starts. Put new battery's in, new starter stater relay chased wires. For some dumb reason wiggled the pos cable on drivers side battery and the cable came out of the battery terminal. Replaced the terminal and haven't a lick of trouble. Bob

 

2000 should have a crank sensor above the starter. It will also have a cam sensor but if it has both, the crank sensor is causing the problem. Believe they dropped the crank sensor in mid '01.

 

Cranking over means that the engine is turning over, (via starter) but may or may not start, a bad sensor will not affect the engine turning over, but will cause it not to start. I read your post as the starter is NOT turning the engine over....
is this what you mean or that the starter does rotate the engine, but the engines does not run.

 

I'm having a similar problem with my tachometer dropping to 0 while the truck is moving forward, but I'm actually noticing a drop in power. She'll still go, but she responds like my old '94 Ranger with it's 2.3L 4 banger under the hood. It'll stay at 0 for about a mile, then pop back up and she responds like normal. The other gauges are all reading normal during all of this, too. It was kinda amusing when the tach dropped on a hill. I haven't had to downshift on a hill in years! One of my friends suggested it might be the injectors...I'd take her to a shop, but the nearest shop my warranty covers is 18 miles away (go AutoSave, yeehaw). Any ideas?