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What is the OPDA and do I need to change mine?

Rickwhoo

TJ Enthusiast
Joined
Jun 24, 2021
Messages
115
Location
Moscow PA USA
Ok, Replaced it and wondering if it matters the position of the whole unit in its position on the engine? It turns exactly like a distributer would for adjusting timing. Does it matter???
 

JMT

Definitely a Snowflake ❄️
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Feb 27, 2017
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Ok, Replaced it and wondering if it matters the position of the whole unit in its position on the engine? It turns exactly like a distributer would for adjusting timing. Does it matter???

Does it run smoothly? If so, your fine.
 
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Mikee024

stuck in the city
Supporting Member
Joined
Mar 29, 2021
Messages
873
Location
NY
Runs great

Fwiw, I ran the included Crown sensor with my OPDA and it ran well until it randomly failed on me without much of a warning.

My warning was the RPMs cycling up and down twice (I thought maybe it was me losing traction in the rain during a turn). I shut off the Jeep to go inside a local business (and definitely should not have done that!).

My engine had a P0344 code for the CPS that would not erase and my Jeep would not start.

Luckily I was able to get a ride and replaced the part with with my spare Napa Echlin CPS. It started right up and the code has not come back.

I’m tempted to keep a 10mm socket & driver along with my spare OEM CPS with me at all times after that experience.

Don’t mean to scare anyone but I don’t want anyone to get stranded especially off the grid.
 

Charlie L

TJ Enthusiast
Supporting Member
Joined
Oct 2, 2021
Messages
176
Location
Success, Missouri
Fwiw, I ran the included Crown sensor with my OPDA and it ran well until it randomly failed on me without much of a warning.

My warning was the RPMs cycling up and down twice (I thought maybe it was me losing traction in the rain during a turn). I shut off the Jeep to go inside a local business (and definitely should not have done that!).

My engine had a P0344 code for the CPS that would not erase and my Jeep would not start.

Luckily I was able to get a ride and replaced the part with with my spare Napa Echlin CPS. It started right up and the code has not come back.

I’m tempted to keep a 10mm socket & driver along with my spare OEM CPS with me at all times after that experience.

Don’t mean to scare anyone but I don’t want anyone to get stranded especially off the grid.

Since replacing my OPDA last week and having my rottie chew up my CSS, I bought a used OPDA on ebay so that I could replace the Crown sensor with an OEM sensor. I hope it's as bulletproof as everyone thinks.
 
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Mikee024

stuck in the city
Supporting Member
Joined
Mar 29, 2021
Messages
873
Location
NY
Hopefully it'll work. Don't think $58.50 is too much to pay if it does. I saw one more on there, same seller, same price.

Let me know you aren’t interested in the other one. I may grab it up. I didn’t see the listing you mentioned.
 

Mikee024

stuck in the city
Supporting Member
Joined
Mar 29, 2021
Messages
873
Location
NY
The OPDA arrived this morning, replaced the Crown sensor and she fired right up. Hope yours works too.

Nice Charlie!

Mine arrived this afternoon, but the wire is damaged right at the sensor so I requested a return.

1660275785119.png
 

Gilly11277

TJ Enthusiast
Supporting Member
Joined
Oct 13, 2021
Messages
132
Location
Dekalb, IL
Looks like my TJ needs some tlc. Mopar Garage o my shows one recall and it isn’t the OPDA.

@Zorba - Nice write up!

The original video in this thread seems helpful. Does anyone think it could be done better/did he make any mistakes? Going to order one of these ASAP.

38F1D454-ECF6-4C9B-BD46-628E2F8E78E8.jpeg
 
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