PhillyJake
TJ Enthusiast
That's helpful, thank you. I don't have a scanner with those capabilities, but good to know what it means.
I looked at your rig and thought, "huh, eerily similar looking to mine." then I looked at your mods list and thought, "I've got a looooong ways to go."
shoutout to Light Khaki Metallic!
Did you ever figure out if it should have any play up / down side to side? I see no magnet starts.. then dies very rough idle also.
For those that need the relearn, I found that this scanner will successfully do it:
https://www.amazon.com/dp/B0744B55QV/?tag=wranglerorg-20
Takes like 5 minutes. Not cheap but you can do it every time you touch the camshaft synchronizer.
As a note, I have seen people claim you can reset it by unplugging the PCM. For the 05-06 series at least, the cam-crank correlation data is stored in non-volatile memory, and unplugging it will not reset it.
https://www.amazon.com/dp/B0744B55QV/?tag=wranglerorg-20
Takes like 5 minutes. Not cheap but you can do it every time you touch the camshaft synchronizer.
As a note, I have seen people claim you can reset it by unplugging the PCM. For the 05-06 series at least, the cam-crank correlation data is stored in non-volatile memory, and unplugging it will not reset it.
It shouldn’t have significant play. I replaced the OPDA after this post:
Post in thread 'How to change your OPDA'
https://wranglertjforum.com/threads/how-to-change-your-opda.79/post-490772
What kind of noises and issues can you expect from a bad sensor? I’ve also read that these sensors don’t always throw a code. Thoughts?
My experience with 2005 LJ Rubicon: I experienced intermittent camshaft position sensor sync issues, and camshaft position sensor intermittent signal issues. The engine always started but had to spin over several times before starting. The ECM was a year-old WranglerFix unit. The folks at WranglerFix were very helpful, and suggested the Camshaft Position Sensor might be the issue. I already had three on hand.
I broke down and had Mark at WranglerFix send me a new ECM. I wanted a spare one anyway.
Still no joy! same old problem. Dang it. I guess it's time to gold plate the entire system.
I removed the wiring harness and unwrapped all of it. I did not find any abrasions. I looked at continuity of every path for 5Volts, grounds, and sensor paths. I found three splices that tested 1-2 ohms, not much but improvable. I cut them out and rebuilt them with soldered connections and Ancor marine heat-shrink tubing. Now they test ZERO ohms. Wiring harness is a big job! Hint: the O2 sensor connector behing the engine is not fun. It's much better if you connect it first.
I installed a new Crown OPDA.
I pulled #1 spark plug and turned the engine to TDC at the top of compression stroke. Make sure your are at top of compression! I aligned the timing marks. I set the OPDA position using the alignment holes and a small screwdriver.
The engine started instantly, no MIL! I was hopeful.
I used an AUTEL Maxisys OBDA tool to display the camshaft-crankshaft sync difference, My physical alignment was pretty close, 4.4 degrees. I reset the OPDA position to make it as close to zero as possible. Now the AUTEL box displays the difference as zero or .1 degree.
After about 2000 miles I've not had a hiccup, nor seen the MIL light.
I cycled my previously questionable Cam Position Sensors through the Jeep, and I think they're all good.
Glossary
ECM: Engine Control Module
OPDA: Oil Pump Drive Assembly
TDC: Top Dead Center
MIL: Maintenance Indicator Lamp, sometimes called check-engine light
WranglerFix: An incredibly helpful and dependable resource for our community.
NOTE: 05 and 06 ECM and OPDA are different from older units. in 05 the transmission controller was moved into the ECM housing, and the ECM and OPDA are both different. 05-06 OPDAs have the big black flat top with two torx screws holding the cap. They do not interchange with 04 or earlier. 05 and 05 OPDAs are subject to bushing failure and can demage the oil pump drive gear on your camshaft. If you've experienced the howl or chirp from you OPDA, pull it and carefully inspect the gears. A failure can result in serious engine damage.
My 05 LJ Rubicon is happy again!
I broke down and had Mark at WranglerFix send me a new ECM. I wanted a spare one anyway.
Still no joy! same old problem. Dang it. I guess it's time to gold plate the entire system.
I removed the wiring harness and unwrapped all of it. I did not find any abrasions. I looked at continuity of every path for 5Volts, grounds, and sensor paths. I found three splices that tested 1-2 ohms, not much but improvable. I cut them out and rebuilt them with soldered connections and Ancor marine heat-shrink tubing. Now they test ZERO ohms. Wiring harness is a big job! Hint: the O2 sensor connector behing the engine is not fun. It's much better if you connect it first.
I installed a new Crown OPDA.
I pulled #1 spark plug and turned the engine to TDC at the top of compression stroke. Make sure your are at top of compression! I aligned the timing marks. I set the OPDA position using the alignment holes and a small screwdriver.
The engine started instantly, no MIL! I was hopeful.
I used an AUTEL Maxisys OBDA tool to display the camshaft-crankshaft sync difference, My physical alignment was pretty close, 4.4 degrees. I reset the OPDA position to make it as close to zero as possible. Now the AUTEL box displays the difference as zero or .1 degree.
After about 2000 miles I've not had a hiccup, nor seen the MIL light.
I cycled my previously questionable Cam Position Sensors through the Jeep, and I think they're all good.
Glossary
ECM: Engine Control Module
OPDA: Oil Pump Drive Assembly
TDC: Top Dead Center
MIL: Maintenance Indicator Lamp, sometimes called check-engine light
WranglerFix: An incredibly helpful and dependable resource for our community.
NOTE: 05 and 06 ECM and OPDA are different from older units. in 05 the transmission controller was moved into the ECM housing, and the ECM and OPDA are both different. 05-06 OPDAs have the big black flat top with two torx screws holding the cap. They do not interchange with 04 or earlier. 05 and 05 OPDAs are subject to bushing failure and can demage the oil pump drive gear on your camshaft. If you've experienced the howl or chirp from you OPDA, pull it and carefully inspect the gears. A failure can result in serious engine damage.
My 05 LJ Rubicon is happy again!
I just replaced my comps and when I start it revs to redline immediately. Mine looks different than yours. What did I do wrong?
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