[s-cars] Help! Car won't start...

[dgraber460 at aol.com]

Gents;
On this subject, my 95 S6 exhibited some strange behavior last night.
Shut it off briefly, and on trying to re-start, it twice cranked and cranked but no spark. I have already replaced the CPS so I didn't think that was it. Knowing the ignition switch is another Achilles heel with these (on its third) I jiggled and wiggled the switch and tried again and it started right up.
Can the ignition switch cause this or am I looking at another CPS swap?

Dennis Graber 
720-838-0558



-----Original Message-----
From: Tom Green <trgreen at comcast.net>
To: JC <jc at j2c3.com>
Cc: 's-car list' <s-car-list at audifans.com>
Sent: Sat, May 14, 2011 8:56 am
Subject: Re: [s-cars] Help! Car won't start...


Right on. That was my first post to him on the problem; get the ECU to 
communicate. 
 
The ignition switch is not selective in switching on items other than the starter; 
otherwise it powers the bus, and it appears most of the ignition switched items 
receive power. I am not sure about any part of the issue because I am not there; 
many times essential information is omitted. My take on ignition switches is it 
can't hurt, since, if it isn't broke, it will be. I just would not start there without other 
indications of a faulty switch. 
 
Tom 
 
On May 14, 2011, at 8:32 AM, JC wrote: 
 
> I wouldn't be so sure of that Tom - he's missing ignition switched > power at 
> ECU and can't talk to it. 
> 
> Re: Bilhoney's suggestion - lack of Crank Pin is like bad CPS - > something 
> that only comes in once the ECU is alive and operating. If the ECU > isn't 
> live then it won't even have gotten to the point of checking for that. 
> 
> I'd say need to be able to talk to the ECU first before worrying about 
> anything else. 
> 
> Darren - you DID check the all the fuses including ones down there > in the 
> footwell, right? I think somebody posted that right at the beginning > of your 
> troubles..? 
> 
>> 
>> I don't think so. I have not read of any issues posted that 
>> point to a bad ignition switch. 
> 
>> 
>> Tom '95 S6 
>> 
>> On Thursday May 12, 2011, at 10:50 PM, "Darren Smith" 
>> <DS288925 at mycia.net > wrote: 
>>> 
>>> So, we have power at pin 18 on the ecu but not at pin 37. Ground is 
>>> good at pin 24. 
>>> 
>>> Will a new ignition switch help/solve my problem? 
>>> 
>>> 
>>> Signal Description 
>>> 3. Fuel Pump Relay signal (output) (E87) 18. ECU Power 
>> Supply Terminal 
>>> 30 (+12V), Fuse #64 37. Voltage Supply (+12V) input with 
>> ignition on 
>>> for all 5 Fuel injectors (N30-N83), Mass Air Flow Sensor (G70), Evap 
>>> 
>>> 
> 
> 
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> 
 
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