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The CPS (Camshaft Position Sensor) is one of the weakest links on the Ford 7.3 Powerstroke engines. The sensor has a high
failure rate and common symptoms include having the engine die while driving as if you turned the key off just to have the
driver pull over and restart without any problems; periodic 'hiccupping' of the engine; complete failure of the CPS can kill the engine
and will not let it restart.
I have read where Ford dealerships have been known to charge as much as $250 for a CPS
at the parts counter,
$650 parts and labor for the service department to change it out. You can do it yourself for a small fraction of that price.
Many online vendors are selling a new and improved CPS, including shipping for only $25, dealers typically sell them for around $35.
With just a few simple hand tools and a little know-how, you can do this and save some serious greenbacks. This
CPS is the same for 1996.5 through the 2003 7.3L engines.
Got a question? Contact me on my DieselOrings.com webshop CONTACT PAGE
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UPDATE!
5-3-2010
I have been able to procure a quantiy of the old black CPS' made by Navistar International. The International Part # 1825899C93 cross references to Ford's F7TZ-12K073-A, the original black CPS which retailed
for well over $100. You can purchase one at DieselOrings.com which included a new spare CPS Viton o-ring for
$48.50. With the spare o-ring, you can keep your gray CPS in the glove box as a spare.
UPDATE!
2-5-2009
Many 7.3 owners are reporting rough idle and poor performance and various cylinder failures on the Cylinder Contribution tests with the new gray CPS Ford has installed on recall. Many are switching back to their black CPS
if they had a spare. I have seen reports that some have tried the pre-99 International CPS (International Part 1821720C99) with success. One has stated that the CCT failures have disappeared along with
smoothing out the idle and quicker starts with the older International CPS.
If you are running a DP Tuner, check with Jody before installing this CPS to work with the chip.
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Parts and supplies to change out the CPS
NEW Camshaft Position Sensor - Ford #- F7TZ-12K073-B
O-ring lubricant - motor oil, moly grease, silicone grease, etc.
dielectric grease
Anti-seize lubricant
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Tools to change out the CPS
10mm 6pt socket - 1/4" drive
3" extension - 1/4" drive
screwdriver or small pry bar
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First, locate the existing CPS, looking at the front of the engine, it is about the 10 o'clock position on the flywheel dampener.
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The CPS can be accessed easiest from under the truck.
Disconnect the electrical connector from the CPS by gently lifting on the locking tab and pulling the plug from the CPS.
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Using the 10mm 6pt socket, make sure the socket fully engages the entire bolt head so you do not strip the bolt shoulders
and loosen. Once the bolt is broken loose, it should come out easily.
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Swivel the timing mark indicator slightly out of the way and position a pry bar or large screwdriver between the CPS and
engine block and gently pry the CPS out of its mounting hole. Once the o-ring clears the engine block, you should be able to
reach up and remove the CPS.
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Prepare the new CPS for installation by lubing the o-ring with engine oil or a light coating of grease.
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Put a small amount of anti-seize lubricant on the 10mm bolt.
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Insert the new CPS in the engine block hole and push it in as far as you can by hand. Do not worry if it does not
completely seat. Using the timing mark indicator, rotate the CPS so you can insert the 10mm bolt and tighten.
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Use a small amount of dielectric grease on the watertight fins of the plug. Do not get any of the grease on the metal
contacts as it will prevent electrical continuity and will not allow the CPS to work properly. Insert the plug into the CPS until the
lock tab snaps into place.
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Test drive the vehicle for proper operation.
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There are many reasons that could cause stalling or a rough running engine, the CPS is only one. If you changed your
CPS in an attempt to solve a stall or rough running problem and didn't fix the problem, don't throw the old one out as it is
probably still good. Keep it as a spare in the glove box because you never know when one of these will give out on you, usually
on the weekend when the dealerships and parts houses are closed. You will want to
pick up a new o-ring becase the one that came out with the CPS will never seal correctly and if reinstalled, will begin to drip oil down the front of the engine.
I have these o-rings made with genuine Viton available on my webshop for only $2.00 each -
DieselOrings.com.
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Back to guzzle's Powerstroke Maintenance Index |
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