[s-cars] e//S2 in need of help

[Dave Forgie]

While I am correct about the CPS being needed to start the car, Mihnea
Cotet (MRC) has noted on the S2 forum that somehow, it comes back into
play at something over 4000 RPM.  I can't confirm that but have to
presume that it is correct.  That being true, the CPS could fail after
start-up and then, during a spirited use of the throttle, when the
engine goes over 4000 RPM and the ECU notices the CPS is not functioning
as required, it shuts the engine off to save it (that seems unlikely
because typically there is a "limp home" mode so you can at least drive
the car to the side of the road).  But if that is true, when you would
go to refire the car, it won't fire because the ECU does not get the CPS
signal that it is okay to trigger the J17 fuel pump relay (at least in
an UrS car).

Before you tackle the CPS, I would confirm that your fuel pump is
functioning by hard jumping it an measuring 15 sec of output (should be
about 675 mL).  Then I would check to see if you have spark at the
coils.  You could have an ECU fuse failure because one of the OE coils
shorted out (the wires get brittle and crack and will short to the cam
cover - which blows the ECU fuse).  If you have an otherwise functioning
fuel pump and you have spark, then I guess you have to conclude that its
the CPS.  However, it could also be the crank position sensor (are you
running an aluminum flywheel - TMTek has had problems with their sensor
pins).

Too bad you can't pull codes because they do help in situations like
this when there are multiple potential problems/solutions.

Good luck.  Keep us up to date.

Dave F.



>>> Dave Kase <davekase at pdqlocks.com> 03/18/07 11:13AM >>>
Well, its seems my A and B code sockets are not hooked up properly.  I

can't get any codes.

I read your posts on the S2 Forum and you say that the cps doesn't come

into play under normal driving.  That is what I was doing when the car

shut off.  I am trying to figure out if I should pull the valve cover 
and have a go at the CPS.  Any comments?

Thanks,
Dave K.

Dave Forgie wrote:

>Dave:  You are describing the results of a cam position sensor
failure. 
>I am not saying that's what it is but, if you can, pull the blink
codes.
> Look for 2113.  If I am right, the fix can be inexpensive using the
>Hall senders from BB Automacao as per the GB last year.
> 
>Dave F. 
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