2005-06 Jeep OPDA_CPS_Distributor Failure - Page 51 - JeepForum.com
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post #751 of 5422 Old 03-08-2011, 08:16 PM
jkp
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There are six sets of notches in the target wheel. Each set corresponds to the opening of one of the intake valves and is used by the computer to fire the injector for that cylinder.


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post #752 of 5422 Old 03-08-2011, 08:40 PM
Heath
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If that is correct then it can all still be phased off the crank. Set the crank to TDC on #1 and "set" or "reset" the box from there. As lng as the box has memory, its all good.
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post #753 of 5422 Old 03-08-2011, 09:47 PM
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Crawled and subbed
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post #754 of 5422 Old 03-09-2011, 10:36 AM
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I ordered the Shell grease from Sky Geek and received it in three days with normal ground shipping. Great service...

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post #755 of 5422 Old 03-09-2011, 11:27 AM
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Originally Posted by mytrollaccount View Post
If that is correct then it can all still be phased off the crank. Set the crank to TDC on #1 and "set" or "reset" the box from there. As lng as the box has memory, its all good.
Let's assume that you could program all of this to "be phased off the crank". Your last line states a problem...How is memory maintained when the battery is removed?

I think that the best solution is a redesign of OPDA to last longer rather than change what does what in the engine...just my two cents.
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post #756 of 5422 Old 03-09-2011, 12:42 PM
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Adam from Crown is looking for an OPDA to use in his research. Anyone have one?
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post #757 of 5422 Old 03-09-2011, 02:05 PM
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Originally Posted by JeepScrap View Post
Curious to see what Willy or anyone else thinks about this bronze gear.
This is not an application that I would think a good fit for bronze.

If you think that the steel gear wears too quickly, bronze is multiples less tough. E.g. Bronze hardness (Brinell hardness scale) is about a 100, mild steel about a 300 and hardened steel about 600.Bronze is often used to make sure that other metals are not damaged whatsoever. In this case the cam gear would not be affected at all but the bronze OPDA gear would need to be replaced every 100-1000 miles. Okay, it may not be that ridiculous but I expect it will be bad.

The bronze gear would have to be used in an environment where the stresses were minimal. We believe that we know this is not the case in the current design of the OPDA: where we have mild steel bushings seizing on the hardened steel shaft.
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post #758 of 5422 Old 03-09-2011, 06:55 PM
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Quote:
Originally Posted by TotallyScrewed View Post
This is not an application that I would think a good fit for bronze.
I agree, however there may be a potential alternative - Comp Cams makes a composite (carbon fiber, I believe) distributor gear for Chevy engines that seems to be popular. They don't make it for our engine, but perhaps Crown could look into that, assuming it would provide adequate life and wear resistance.

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post #759 of 5422 Old 03-09-2011, 07:01 PM
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for what its worth - mine had been ticking for a long time, driving me nuts.
I pulled it, found slight wear on the gear, but definite play in the rotation back and forth and obvious ticking i could feel while running.

I ordered one from the local dealer, it came in two days later. 160 bucks.

After replacing, and correctly positioning, the engine ran perfect and ticking was gone, but check engine was on throwing a cam position code.

Dealer relearned the computer for 20 bucks and its all fixed and running perfect.

(2005 TJ, 103,000 miles at replacement.)
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post #760 of 5422 Old 03-09-2011, 07:10 PM
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Originally Posted by JrJmisn View Post
for what its worth - mine had been ticking for a long time, driving me nuts.
I pulled it, found slight wear on the gear, but definite play in the rotation back and forth and obvious ticking i could feel while running.

I ordered one from the local dealer, it came in two days later. 160 bucks.

After replacing, and correctly positioning, the engine ran perfect and ticking was gone, but check engine was on throwing a cam position code.

Dealer relearned the computer for 20 bucks and its all fixed and running perfect.

(2005 TJ, 103,000 miles at replacement.)
Was this recently? We have not seen a OPDA in stock or sell for $160 in a few months.
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post #761 of 5422 Old 03-10-2011, 05:37 AM
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pretty recent. I did the replacement in maybe September..it actually might have been October. There really wasnt a huge issue. Walked in, told them what part I needed, they ordered it and it came in within a week.


I had the computer relearned during my inspection in January a few months ago. I rode with the check light on for a while.

No hype, no problem in my experience.
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post #762 of 5422 Old 03-10-2011, 08:22 AM Thread Starter
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Quote:
Originally Posted by JrJmisn View Post
pretty recent. I did the replacement in maybe September..it actually might have been October. There really wasnt a huge issue. Walked in, told them what part I needed, they ordered it and it came in within a week.


I had the computer relearned during my inspection in January a few months ago. I rode with the check light on for a while.

No hype, no problem in my experience.
I'm pretty sure the back order started in November. I had no problem and found two fairly easy back in late September early October. There was a back order previously however the price didn't jump like it has this time around.
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post #763 of 5422 Old 03-10-2011, 11:07 AM
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Not directly related to the OPDA, but I was thinking about trying one of these filter magnets. There have been other threads on this product. If the OPDA and cam gear are wearing, perhaps this could serve as added protection in trapping some of the metal particles that are too small for the oil filter to catch.


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post #764 of 5422 Old 03-10-2011, 11:51 AM
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Quote:
Originally Posted by ChaseB View Post
Not directly related to the OPDA, but I was thinking about trying one of these filter magnets. There have been other threads on this product. If the OPDA and cam gear are wearing, perhaps this could serve as added protection in trapping some of the metal particles that are too small for the oil filter to catch.

interesting, i just placed an order for one.

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post #765 of 5422 Old 03-10-2011, 12:04 PM Thread Starter
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Originally Posted by ChaseB View Post
Not directly related to the OPDA, but I was thinking about trying one of these filter magnets. There have been other threads on this product. If the OPDA and cam gear are wearing, perhaps this could serve as added protection in trapping some of the metal particles that are too small for the oil filter to catch.

I suppose it can't hurt.
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