No subject
Wed Mar 7 20:46:28 EST 2007
you can get to a breaker yard, or Ebay, you can find the hall switch devi=
ce in Bosch distributors used in older Audis and Volvos, which can be suc=
cessfully transplanted to the CPS mounting bracket. I did this a couple o=
f years ago and cost $50.
I'm on the road at the moment so can't get to the part no. for the hall e=
ffect switch which is now discontinued tho there is a replacement.
Good luck
Tony
96 S6
> =
> From: Vincent Fr=E9geac <s.sikss at gmail.com>
> Date: 2007/05/11 Fri PM 06:03:49 EDT
> To: <s-car-list at audifans.com>
> Subject: [s-cars] By-passing the CPS
> =
> I?ve read somewhere that the role of the CPS is to tell the ECU the sta=
rter
> is actually cranking the engine so it?s OK to activate the fuel pump
> (something you don?t really need a buried in 8h of work sensor to reali=
ze).
> Then, the engine speed sensor takes the relay and tells the ECU to keep=
the
> fuel pump running. This brought two questions to my mind:
> - Would a check light on the fuel pump wires be a good way to =
tell
> if the CPS is the problem, at least for the warm-start problem I?m havi=
ng?
> If the fuel pump does not receive the expected ~12V when the starter cr=
ank
> the hot, not starting engine, but does when the engine is cold, it?s a =
CPS
> problem. If it?s receiving 12V when the engine is hot, look elsewhere.
> - Would a wire from the starter solenoid wire to the fuel pump=
,
> with a diode on the existing fuel pump positive wire to avoid frying th=
e
> ECU, be a good way to get rid of the CPS problem until I have time to g=
o
> through the timing belt and CPS, which is not exactly the case right no=
w,
> except if I start considering sleeping time as optional?
> I can?t see any logical reason this wouldn?t work but before I fry the =
ECU
> with my somewhat tired logic, I though pinging the list wisdom would be=
> safer.
> =
> - Optional question: Why in the hell did they use two engine s=
peed
> sensors, which means two reason to fail on us, when one would do the jo=
b? I
> mean, when the ECU would realize that the crankshaft is turning but not=
the
> camshaft because of a broken timing belt, it?s way too late to save the=
> valves and pistons anyway, and the engine would have probably stopped b=
y
> himself by loss of any compression, or intake or exhaust or whatever.
> =
> TIA for your help on bringing reality check to my poor beaten up logic.=
> =
> =
> =
> Vincent
> ?96 S-Bitch keeping me busy and frustrated
> ?81 Fiat Spider 2000 I would?nt qualify in fear my post would be rated =
18+
> =
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