[V8] Testing RPM Sensor

[bob moy]

If the only code that you are getting is 2111 and the tach doesn't bounce 
while cranking the engine, then I would just change the rpm sensor.

You need both the crank position and rpm sensors working before you will get 
a spark.  The ECU sends a trigger signal to the coil to cause the spark to 
occur.

You can subscribe to www.alldatadiy.com for more information about your car.

I used the LED light that I made to blink out the code to check out the 
trigger signal from the ECU.

HTH
Bob


>
>Thanks for the help guys!
>
>I pulled the codes, and it was giving me the code for the RPM sensor
>(2111),
>however my car will not start and according to the documentation that I
>have
>(http://www.sjmautotechnik.com/trouble_shooting/ecufv8.html#fcthree)
>sometimes when the car will not start and you pull codes 2111 will come
>up.
>Does anyone out there have any experience with this?
>
>I have not had any hot start issues with the car, but I have only owned
>the
>car for a couple of weeks now. What else could cause my problem? I am
>missing spark from both sides of the engine.
>
>Thanks again for the help!
>~Eric
>
>
>On 9/25/05, Tony and Lillie <tonyandlillie1 at earthlink.net
><http://www.audifans.com/mailman/listinfo/v8> > wrote:
> >
> > The tach bouncing means no spark signal. Now, as to why, as Steve
>said,
> > pull
> > codes. Easy enough, and will save you time and $$$.
> >
> > If you find the RPM sensor bad, here's some advice. First, replace
>them
> > both. It's easy enough, and cheap insurance. Next, if you plan on
>keeping
> > the car, and you want the job easier next time, use 5000 Turbo
>sensors.
> > They
> > have a longer pigtail, and you can relocate the bracket to the
>firewall,
> > rather than where it is right now - you'll see.
> >
> > Oh, the resistance should be right around 1000 ohms. I believe that is
> > between the two outer terminals, but it's been a while.
> >
> > Tony Hoffman
> >
> > ----- Original Message -----
> > Subject: Re: [V8] Testing RPM Sensor
> >
> >
> > > ... codes???
> > >
> > > I believe the manual has some resistance values ... I've never tried
> > > that method, nor would I make the call based on whether or not the
>tach
> > > bounces ... in many cases the situation is obvious from the symptom.
> > > Has the car had hot start or stalling symptoms in the past? There
>are
> > > many things that can lead to a cold no start ... fuel pump was bad
>for
> > > me once ...
> > >
> > > Steve B
> > > San Jose, CA (USA)
> > >>
> > >> I put some time into diagnosing my V8Q no spark issue today.
> >
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