Gray vs. Black CPS test
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
No codes here, also. I have been seeing a consistent average increase of .5 mpg since the reinstallation of the black CPS. I would recommend to everyone who has one to put that sucker in there.
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I ordered 2 more black ones from DP Tuner after I discovered my truck likes the black one. I decided to compare the gray vs. black side by side and noticed the gray one has a smaller head than the black one for the OBS trucks. Do any of you have a newer black one from IH, or the original Ford black on, or even a blue one as a spare that we could compare measurements on?
Here's what I've got
Here's what I've got
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
No need for the reps. I've got plenty.
I had someone ask me for the part number, and have stumbled across something interesting. According to our lovely search function the IH part number for our trucks is 1825899C93. When I read the box from DP I see this
More search reveals this looks to be the CPS for the OBS trucks. I can't argue with the improvements it made on my truck, but now this has me wondering.
For any others that have used the black IH model. Do you know which part number you used? Anyone know the difference between these parts? I'm going to shoot Jody an email and see what he has to say.
I had someone ask me for the part number, and have stumbled across something interesting. According to our lovely search function the IH part number for our trucks is 1825899C93. When I read the box from DP I see this
More search reveals this looks to be the CPS for the OBS trucks. I can't argue with the improvements it made on my truck, but now this has me wondering.
For any others that have used the black IH model. Do you know which part number you used? Anyone know the difference between these parts? I'm going to shoot Jody an email and see what he has to say.
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I wonder why the gray one is smaller? I've also been curious about the length since I've read about some of the OBS guys having to shim the CPS to get a better reading. Jody couldn't find any problems with the old ones in our trucks, and found no reason to add a shim. I'm just the curious type.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
I wonder why the gray one is smaller? I've also been curious about the length since I've read about some of the OBS guys having to shim the CPS to get a better reading. Jody couldn't find any problems with the old ones in our trucks, and found no reason to add a shim. I'm just the curious type.
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I had heard something about the cam "walking" and the timing plate on the cam gear rubbing the CPS. The shims were to prevent it from hitting. It may have been a problem with the OBS that was later corrected. I'm not sure.Your C99 and my C93 seem to be the same externally.
Post Fiend
Joined: Feb 2007
Posts: 7,191
Likes: 4
From: Blairsville,Ga
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Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
I was told this by the mechanic I used to work for. I believe it had to do with the thrust plate clearance on the front of the block and cam; making it able to move too far forward.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
Looks like you measurement could have been from the small step below the mounting flange to the end. From the flange to the end, my 1825899C93 measures the same as the one Chris used from DP Tuner.
Postmaster
Joined: Jul 2006
Posts: 3,754
Likes: 1
From: Indianapolis
Ya know I'm real glad I came on this post- because after I replaced my injectors (and before the grey CPS install) I had damn near all 8 zeros. Now, # 3,5, and 8 (sometime 1 too) are at least 1 or above, with the #8 usually around 4-5. I think I will change back too!
Once again, can someone explain exactly what these numbers mean? For example are they on a scale of 1-100? Are these numbers a reason to be overly concerned (if so at what point)? Thanks!!
Once again, can someone explain exactly what these numbers mean? For example are they on a scale of 1-100? Are these numbers a reason to be overly concerned (if so at what point)? Thanks!!
Post Fiend
Joined: Feb 2007
Posts: 7,191
Likes: 4
From: Blairsville,Ga
measurment is from bottom of flange to tip
Postmaster
Joined: Sep 2004
Posts: 3,916
Likes: 0
From: Bellingham, WA
Ya know I'm real glad I came on this post- because after I replaced my injectors (and before the grey CPS install) I had damn near all 8 zeros. Now, # 3,5, and 8 (sometime 1 too) are at least 1 or above, with the #8 usually around 4-5. I think I will change back too!
Once again, can someone explain exactly what these numbers mean? For example are they on a scale of 1-100? Are these numbers a reason to be overly concerned (if so at what point)? Thanks!!
Once again, can someone explain exactly what these numbers mean? For example are they on a scale of 1-100? Are these numbers a reason to be overly concerned (if so at what point)? Thanks!!
I believe it was mentioned earlier, but if they are over 3-5%, it is a cause for concern. Ideally, they will all read 0.0%. Mine are pretty close, some being around 0.7% or so.
Postmaster
Joined: Sep 2004
Posts: 3,916
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From: Bellingham, WA
Basically, yes. However, i'm not the expert by any means. It just means that there is a change in the rotational velocity, so it's not running as smooth as it could be. Lots of reasons for this though.