Cam sensor, crank sensor or both?
- Thread starter matkal
- Start date
OP
Well fu€£, crank no start, it’s never simple is it? While cranking the tach and speedo are motionless for a couple seconds, and then they start to jump around. Speedo going back-and-forth from 0 to 60 and the tack bouncing up and down and then spinning around way past the stop and then going back to zero.
you got a video of the speedo going crazy? Do you have the OEM speed sensor on the transfer case output or do you have something tricky like a speedo healer in the mix? I can't figure out why the speedo would move if the rear drive shaft isn't moving.
That's starting to sound like an electrical problem. Check your battery connections and grounds real well. I think I've read threads on here where really odd things happen with the gauges when a battery connection is "finky."
OP
I can’t post the video but both the tach and speedo do a fast bounce up and down to 5k rpm and 70mph
Edit: standard speedo sensor
Edit: standard speedo sensor
OP
Good afternoon from sunny South Florida,
It has been my experience that a p0340 is pcm related on a TJ. The P0344 is most likely camshaft or crankshaft related and p0016 is timing of cam, crank and synchronizers. I have an 03 that we can test the ECM in if you would like to send it into us. The turnaround time is 24-48 hours.
It has been my experience that a p0340 is pcm related on a TJ. The P0344 is most likely camshaft or crankshaft related and p0016 is timing of cam, crank and synchronizers. I have an 03 that we can test the ECM in if you would like to send it into us. The turnaround time is 24-48 hours.
OP
OP
I talked to Tony at @Wranglerfix and he walked me through some diagnostic steps to determine whether or not I need to send in my PCM. I checked and cleaned all the related connections; CPS and CPS, PCM, grounds and battery, still crank-no start, so my PCM will be getting an all expenses paid vacation in sunny Florida.
OP
Good news/bad news; Good(?) news is my PCM is fine, talked to Jay at @Wranglerfix , he said he put my PCM in his TJ and it worked just fine. Bad news is back to where I started. Jay gave me some more insight to narrowing down the problem; AutomaticShutdownRelay, Cam pos sensor or wiring/connectors. Jay also said that lacking Mopar sensors, he's heard good things about NAPA Echlin(?) parts.
If its not the ASD relay I'll be handing TJ off to my mechanic as I don't have the patience to track down a wiring issue more than I already have.
If its not the ASD relay I'll be handing TJ off to my mechanic as I don't have the patience to track down a wiring issue more than I already have.
I may have already said it in this thread, but I've never opened up a TJ harness and NOT found an issue. But the highest ROI for your effort is to just look at the wiring right at all the sensor connectors. Seems like the insulation is always pulled back & wires twisted. That's enough to make it not start. You won't even have to remove any wire loom to look.
OP
That's what I did, the low hanging fruit and that is the extent of my patience with tracking down wiring issues.
OP
F’k me in the a$$ with a dry pineapple
My mechanic found that the opda and cam have a sheared tooth or two. $2000 to have it done
My mechanic found that the opda and cam have a sheared tooth or two. $2000 to have it done
F’k me in the a$$ with a dry pineapple
My mechanic found that the opda and cam have a sheared tooth or two. $2000 to have it done
Call golen and buy a Stroker!
I respectfully decline.
If you have to replace the cam, probably a good idea to think about new timing chain as well. Or at least inspect it.
OP
OP