I have a 2002 9-3 that I suspect the Crank Posisiton Sensor has gone.
The starting is inconsistent...but it always does after a bit. Does
the CPS seem like a possibility?

How does one go about changing the sensor? Is there any pictures or
websites that describe this?

Thanks,

mleeds (AT) hitechfluid (DOT) com wrote:
If the Crankshaft Position Sensor goes bad you would get a check engine
light and code to show that. In other words, with no CEL code to
indicate the CPS it would be a shot in the dark.

--
-Fred W

On May 1, 7:01 am, Fred W <malt_ho... (AT) yahoo (DOT) com> wrote:
I'm not getting any engine code at all. I'm thinking a shot in the
dark is worthwhile at this point. The symptoms seem to point towards
the CPS & it was relatively inexpensive. I just can't find where it
is located.

On 1 May 2007 07:04:30 -0700, mleeds (AT) hitechfluid (DOT) com wrote:

The symptoms you've told us about don't particularly point to the
crank sensor. Are there more symptoms you haven't mentioned?

Cheers,

Colin.

There really hasn't been much for symtoms expect occasionally it won't
start. Usually leaving it for 10 min & trying again it will start.
The engine turns over with no problems. It's been going on for about
two weeks. Just today the check engine light came on. There is
140,000 km on the vehicle.

On 1 May 2007 14:20:48 -0700, mleeds (AT) hitechfluid (DOT) com wrote:

There's a number of things that could cause that. Temperature sensors,
MAF/MAP sensors, air leaks, clogged injectors, fuel pump problems, low
compression etc. all spring to mind, but that's good news about the
check engine light. Now the computer's finally noticed something's
wrong, you should be able to get a bit of insight by taking it in and
getting the code read.

Cheers,

Colin.

still me wrote:
Yes, now that you have a code to indicate the area of the problem you'll
have a much smaller haystack to look for that needle in...

--
-Fred W

I changed the Crank Position Sensor on May 1st the car has started
everytime since. It also startes better now. The engine light didn't
stay on and I didn't bother to get the code checked. My brother is a
mechanic and said generally it is the CPS when the vehicle only
occasionally starts & no code is left. This is because the computer
needs this information to start the vechicle, but if the engine
doesn't run, the computer doesn't run, therefore no code can be
stored. I figured for the price of a new CPS it was pretty cheap to
try, rather than paying shop rates. To answer my original post the
CPS is on the front of the engine (in realtion to the car), near the
middle right (looking under the hood). It is hidden by a steel plate
& put on with a torx bolt.

mleeds (AT) hitechfluid (DOT) com wrote:
Huh? The computer runs whenever it has power. I'm 100% positive a code
will be thrown for a crank position sensor failure in a no start
condition. But it may fail in different ways

Thanks. Good to know.

--
-Fred W