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1994.5 - 1997 7.3L Power Stroke Diesel  

cps: OBS same as SD??

Old Oct 19, 2009 | 02:36 AM
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Question cps: OBS same as SD??

Just wondering if the cps is the same from OBS to SD 7.3's. A buddy's been having starting troubles and now she cranks but no start and no tach movement. I lent him my spare, but he hasn't had a chance to try it yet. Just thought I'd ask.
Thanks
 
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Old Oct 19, 2009 | 02:49 AM
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They show different part numbers but the same prices and manufactures, I beleive they are the same with the exception of the timing mark indicator is in a different position. Therefore it might not bolt in right but could be used for test purposes.
 
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Old Oct 19, 2009 | 09:25 AM
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I am pretty sure the '97 and the SD's are interchangeable.
 
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Old Oct 19, 2009 | 12:50 PM
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Thanks for the info. I'll let you know what he finds when he tries it.
 
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Old Oct 20, 2009 | 10:20 AM
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The OBS uses a different CPS than the SD, the only difference is the metal in the contacts. Just use some dielectric grease to try and prevent dissimilar metal corrosion.
 
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Old Oct 20, 2009 | 03:52 PM
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I only carry one in my service truck, the gray one I use them in everything from '94 to '03
 
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Old Oct 20, 2009 | 07:12 PM
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Thanks again guys. Hopefully I'll find out tomorrow if it worked for him.
 
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Old Oct 20, 2009 | 08:19 PM
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Any one know why there is what lots of people here call a "timing pointer" on the cps? there is no spark timing to be
set the injector timing isnt adjustable. so what gives??? or is it not a pointer at all???
 
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Old Oct 20, 2009 | 11:52 PM
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There is a metal piece attacched to the cps that is the timing mark pointer, used in showing the timing on the harmonic balancer just like a gas engine. However unlike a gas engine there is no physical timing adjustment, its all done by the PCM. So assuming you had a computer to link the truck to tell the pcm to adjust the timing, you could take a timing light and verify that it is firing at the proper degree.
 
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