Gray vs. Black CPS test
Posting Guru
Joined: Nov 2006
Posts: 1,059
Likes: 0
From: Herndon KY
I was unable to rep also, thanks for the work, i am going to replace the same sensor this weekend and will post my results in this thread. I have messed with a couple of CPS's cause I had them around the fuel mileage is pretty significant between the gray blue and the old 1994-1996 black CPS. I had a drop in mileage from gray to black about 1mpg...I am interested to see if mileage comes back up.
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: 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.
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
The only reason I'll even consider taking mine in on the recall is to get the reimbursement for having purchased the grey one before the recall was formally issued. Even at that, it hasn't yet been worth the $27 to pursue it.
Posting Guru
Joined: Jan 2008
Posts: 1,661
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From: Bridgewater, VA
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Elder User
Joined: Mar 2008
Posts: 626
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From: Ontario, CA
Chris:
Great science project (inquiring minds want to know...)
I'm curious about changing mine out now. I had the recall done in March, but the PO left me a nice, new black one, in the bag, in my glovebox.
Decisions, decisions.....
Great science project (inquiring minds want to know...)
I'm curious about changing mine out now. I had the recall done in March, but the PO left me a nice, new black one, in the bag, in my glovebox.
Decisions, decisions.....
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
For 99-03 7.3L, another way to use AutoEnginuity to see if there are problems with a particular cylinder is to monitor the "Cylinder x Change Rotational Vel" or "Percentage of Crank Deceleration" PID (also commonly called PERDEL). This PID exists for all 8 cylinders and is a representation of crankshaft velocity change (decrease) at the time the cylinder is firing. Ideally, these should all read 0%. Any cylinder consistently reading more than 3-5% change in rotational velocity is suspect and should be further examined. Note: Engine should be fully warmed up before checking PERDEL data.
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I asked Jody about the new vs. old part number for the CPS, and his response was he tested both of them in his truck and could not tell a difference between the two.
I have read about some issues with the CPS in the OBS trucks requiring a shim sometimes, so I plan on measuring the old black compared to the gray to satisfy my own curiosity.
I'll go out on a limb here and guess that Jody knows more about the timing and performance of the 7.3 than I do
so I plan on leaving the above part number black one in my truck.
I have read about some issues with the CPS in the OBS trucks requiring a shim sometimes, so I plan on measuring the old black compared to the gray to satisfy my own curiosity.
I'll go out on a limb here and guess that Jody knows more about the timing and performance of the 7.3 than I do
so I plan on leaving the above part number black one in my truck.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
I asked Jody about the new vs. old part number for the CPS, and his response was he tested both of them in his truck and could not tell a difference between the two.
I have read about some issues with the CPS in the OBS trucks requiring a shim sometimes, so I plan on measuring the old black compared to the gray to satisfy my own curiosity.
I'll go out on a limb here and guess that Jody knows more about the timing and performance of the 7.3 than I do so I plan on leaving the above part number black one in my truck.
I have read about some issues with the CPS in the OBS trucks requiring a shim sometimes, so I plan on measuring the old black compared to the gray to satisfy my own curiosity.
I'll go out on a limb here and guess that Jody knows more about the timing and performance of the 7.3 than I do
so I plan on leaving the above part number black one in my truck.I compared the length of the gray to the black when I changed mine out and saw no visible difference.
Lead Driver
Joined: May 2007
Posts: 5,613
Likes: 9
From: Flagstaff, Arizona
Awesome post Chris! I need to hook up my Superchip paperweight and see if I've got any stored codes, I have the grey CPS in, no apparent problems just like you said......but maybe the black will run better?
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I didn't get any codes from my gray one. The issues only showed up looking at rotational velocity numbers or by running a cylinder contribution test. It seems everyone who has switched back so far think the black one does make the truck run better.