IHC "Blue" CPS
Junior User
Joined: Sep 2005
Posts: 63
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From: Central CA
[QUOTE=blown99 I have found on many 444 that the air gap is to large and the front cover needs to be sanded/ground down a bit to put the clearence back into spec. I've seen the sensors working but cutting out intermittantly with air gaps of .050", ground the cover and reinstalled the sensor and never had a problem since.[/QUOTE]
This is interesting. Never heard of anyone even checking this on the powerstroke. I wonder if improper airgap is one of the things we are fixing with using this sensor. Stronger magnet=stronger hall effect= can have larger airgap?
Blown99 you seem to have a lot of experience with these engines. Why does the DT sensor make a sometimes dramatic difference in the TE444? My engine is noticably smoother, quieter and more powerful (torgue) and it bugs me that no one so far has an explaination as to why. There are a lot of people reporting almost the exact same results I have had.
This is interesting. Never heard of anyone even checking this on the powerstroke. I wonder if improper airgap is one of the things we are fixing with using this sensor. Stronger magnet=stronger hall effect= can have larger airgap?
Blown99 you seem to have a lot of experience with these engines. Why does the DT sensor make a sometimes dramatic difference in the TE444? My engine is noticably smoother, quieter and more powerful (torgue) and it bugs me that no one so far has an explaination as to why. There are a lot of people reporting almost the exact same results I have had.
Senior User
Joined: Jan 2005
Posts: 345
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From: Monterey Park, California
Do these blue ones in any way increase the injector timing? Maybe reading is a few degrees advanced or the reading signal is different causing the computer to think it's advanced. Just a guess.
Last edited by Hello; Jan 3, 2006 at 11:14 PM.
Senior User
Joined: Nov 2004
Posts: 282
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From: Central Wyoming
Originally Posted by Hello
Do these blue ones in any way increase the injector timing? Maybe reading is a few degrees advanced or the reading signal is different causing the computer to think it's advanced. Just a guess.
Junior User
Joined: Sep 2005
Posts: 63
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From: Central CA
Originally Posted by empiretc
Have you guys been keeping track of your mpg?
I did get my worst highway mileage since putting it in on a trip end of last week. I did have about 150 miles of city driving on the tank before the trip and the trip was in bad conditions for CA. Did a lightning fast round trip to the capital to get some papers certified for our China adoption. Ran up and back at 75-80mph in some nasty cross/head winds and a bit of rain and had a solid 20mph headwind almost the entire way home. Got 17MPG for the tank... 589 miles and still had a 1/4 tank left.
Postmaster
Joined: Jun 2005
Posts: 3,438
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From: New Hampshire
Originally Posted by otterdiver
I have. On average I've picked up just over 1.6 MPG. In some situations it's even better (2mpg towing 9000lb).
I did get my worst highway mileage since putting it in on a trip end of last week. I did have about 150 miles of city driving on the tank before the trip and the trip was in bad conditions for CA. Did a lightning fast round trip to the capital to get some papers certified for our China adoption. Ran up and back at 75-80mph in some nasty cross/head winds and a bit of rain and had a solid 20mph headwind almost the entire way home. Got 17MPG for the tank... 589 miles and still had a 1/4 tank left.
I did get my worst highway mileage since putting it in on a trip end of last week. I did have about 150 miles of city driving on the tank before the trip and the trip was in bad conditions for CA. Did a lightning fast round trip to the capital to get some papers certified for our China adoption. Ran up and back at 75-80mph in some nasty cross/head winds and a bit of rain and had a solid 20mph headwind almost the entire way home. Got 17MPG for the tank... 589 miles and still had a 1/4 tank left.
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Let's say it gave an average of 1.5 MPG increase. So, every 150 miles, you're using one less gallon of fuel than you previously were. If fuel cost $2.30 per gallon and the CPS cost you $105.00, you'll need to drive 6840 miles for the CPS to pay for itself.
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Junior User
Joined: Sep 2005
Posts: 63
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From: Central CA
Originally Posted by PSNut
Man...that's great results...unit will pay for itself...ehh?
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Lead Driver
Joined: Dec 2003
Posts: 5,250
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Those are great results! I have a 29gallon on my truck, but it still hurts every time I fill it. I am getting 19mpg pretty average, a little less with this winter blend about 17.5-18. If that sucker pushes the bar up past 20mpg I will be one smiling person.
Senior User
Joined: Aug 2004
Posts: 297
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From: Lewiston, Idaho
Does anybody really know why it is causing these changes in the motor and performance? Is it timing? If it is, assuming the truck has a chip or programmer, i think i would rather keep the stock cps in and allow the tuned chip to advance or retard any timing. If you have both, would there be too much timing adjustments, that could possibly change cyclinder pressures around too much. Maybe i am over thinking this too?!?
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Joined: Aug 2005
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I don't know what would cause the increase in mpg by changing to a blue cmp sensor. Navistar had several different variations in the past few years, one in particular was a sensor that had either gold or silver pins and had to be changed like for like or else an electrical noise could develope. When these engines first came out we were told to check the air gap if there was a poor running, low power, and or a hard start. I would guess that the stronger magnet creates a cleaner signal, and or can decifer the smaller check vane on the pick up wheel, which could cause a more accurate timing. I may try and call the engines group tommorrow and see what I can dig up.
Senior User
Joined: Aug 2004
Posts: 297
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From: Lewiston, Idaho
The IH blue cps has a more tapered end, which i figured it would pick up the check vane on the wheel later, and as the vane passed it would drop the signal earlier too, due to it being tapered and having smaller surface area compared to the stock cps. This is what i thought would cause a timing change. Wonder if it really goes on signal strength, or if it recieves any signal then trips the sensor?
This cps thing is interesting though, especially mpg gains.
This cps thing is interesting though, especially mpg gains.
Junior User
Joined: Sep 2005
Posts: 63
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From: Central CA
Originally Posted by blown99
I don't know what would cause the increase in mpg by changing to a blue cmp sensor. Navistar had several different variations in the past few years, one in particular was a sensor that had either gold or silver pins and had to be changed like for like or else an electrical noise could develope. When these engines first came out we were told to check the air gap if there was a poor running, low power, and or a hard start. I would guess that the stronger magnet creates a cleaner signal, and or can decifer the smaller check vane on the pick up wheel, which could cause a more accurate timing. I may try and call the engines group tommorrow and see what I can dig up.
Senior User
Joined: Mar 2004
Posts: 297
Likes: 1
From: Mi, Middle of the Mitten
I put one in today, didn't notice much difference if any. The truck might be a little quieter at idle but nowhere near the effect that HX cross-over made on the engine. I have only put about 20mi. on the truck, so I can't say anything about mileage yet. I'll keep you updated.
My truck is stock except the HX and 466 cps.
My truck is stock except the HX and 466 cps.