[V8] Testing RPM Sensor

[dsaad@icehouse.net]

Eric -
If you have the manual, follow the procedures for testing the sensor and
wireing. The logical guess is that the sensor is bad, but make sure you have 12V
to both coil packs, and if you have an analog volt meter, LED test light, or a
digital volt meter with "analog meter" functions, you should see the spark
signal to the coils. This is a pulsing signal so some (cheaper) digital meters
will miss it. If you don't see the coil signal and everything else checks out
then you probably have a bad sensor.

Dave


Quoting Eric Devansky <edevansky at gmail.com>:

> 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> 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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