Crankshaft Position Sensor Replacement Guide
The following is the
procedure I developed to change the Crankshaft
(CPS ) on my 1996 Saab 900S
2.3 L NA. It is a very simple part to replace, and is also a cheap part, at $42
from the dealer I bought it from (who would've thought a dealer would have a
part for a good price, let alone have the part I wanted at all
case you were wondering, here is how I confirmed the CPS was not working
correctly. The car would not start sometimes on hot days after short trips, it
would turn off if it got too hot while driving (which was scary), I could hear
the fuel pump working, I checked the started for the correct charge (it was fine
as I thought), I already did the Neutral
bypass as a
Here are the steps:
1) Make sure your engine bay is cool
because you will be bumping into and touching the engine block
surrounding parts during this installation.
2) Locate the CPS. It is directly
across from the radiator
fan, about 8 inches down from
the top of the fan. I can post pictures later tonight.
3) Using the largest
torx screwdriver fitting that was supplied with the car, remove the single torx
screw at the upper right of the CPS.
4) Now, before you remove the CPS,
trace the wire it is connected to around the right side of the engine, and up
under where the plenum/TB cover would reside. I have a custom intake so I did
not have to remove anything to see this connection. There is a white plug with a
red plastic box that penetrates the white plug perpendicularly. Simply pull the
red box away from the large white connection to allow the CPS connection and
wire to fall free.
5) Now, you can either patiently route the connection you
just took apart back around the engine to get the old CPS out of there, or you
can take as little time as I did and simply cut the wire in half and pull the
6) The CPS should now pull right out.
7) Quickly place the new
CPS into the slot in the engine block
, as to avoid
any debris getting in there. MAKE SURE THE OLD O-RING COMES OFF AND THE NEW
O-RING GOES ON the shaft of the new CPS before pushing the part in.
Retorx the screw.
9) Pull the end connection through all of the tubing and
parts in your way. Find the metal spring-formed arch that holds the CPS wire
from jingling about and with one hand, pry it open while you push the wire under
the clip to secure it. This step can be tricky, but is very important to ensure
the wire does not vibrate and prematurely malfunction.
10) Do the opposite of