[V8] TPS & Not-so-smooth Engin

Wed Feb 18 13:37:00 PST 2009

 Sam
Make sure you have both TPS bolts functioning and tight first, and adjust the TPS properly.? IME, I've seen many TPS on v8's held in by 1 screw (the bottom snapped), which can cause all sorts of problems even with a new TPS.? The TPS signal is valid if you have under 3ohms resistance thru the switch at idle and WOT.? If you have under 3ohms resistance, I'd be looking to validate the wires between the switch and the ECU.? This is a common problem on the turbo cars.

Scott J

-----Original Message-----
From: Ron Wainwright <ron_01056 at yahoo.com>
To: Samuel Mrowka <smrowka at gmail.com>
Cc: v8 at audifans.com
Sent: Wed, 18 Feb 2009 3:28 pm
Subject: Re: [V8] TPS & Not-so-smooth Engin

Get a new TPS.
Once you install it pull the Motronic fuses for 10 minutes.
Put fuses back in & go for a ride.
Pull codes again & let me know what you get.

 Ron

--- On Wed, 2/18/09, Samuel Mrowka <smrowka at gmail.com> wrote:

> From: Samuel Mrowka <smrowka at gmail.com>
> Subject: Re: [V8] TPS & Not-so-smooth Engin
> To: ron_01056 at yahoo.com
> Date: Wednesday, February 18, 2009, 4:00 PM
> Yeah, I've blinked out codes and the only one it gives
> me is 2123: the
> throttle switch. I cleaned out and then soldiered the wires
> on the connector
> again, and I'm still getting the same code. So, I'm
> wondering if the sensor
> itself is bad.
> 
> Like you said though, the car is still missing some power.
> What else can I
> check? As you saw from the list I've got some other
> symptoms as well.
> 
> Sam
> 
> On Wed, Feb 18, 2009 at 3:49 PM, Ron Wainwright
> <ron_01056 at yahoo.com> wrote:
> 
> > Sam, didn't we discuss this when I was @ your
> place?
> > Have you pulled those codes?
> >  When I drove your car it was definatley down on
> power.
> > We talked about the bad TPS connector you have.
> I'd start there ist by
> > inspecting it.
> >
> >  Ron
> >
> >
> > --- On Wed, 2/18/09, Samuel Mrowka
> <smrowka at gmail.com> wrote:
> >
> > > From: Samuel Mrowka <smrowka at gmail.com>
> > > Subject: Re: [V8] TPS & Not-so-smooth Engine
> > > To: "Tony and Lillie"
> <tonyandlillie1 at earthlink.net>
> > > Cc: v8 at audifans.com
> > > Date: Wednesday, February 18, 2009, 1:26 PM
> > > You seem to imply there's a difference in
> manual cars.
> > > Does the throttle
> > > sensor have any additional functionality on a
> manual car? I
> > > should have
> > > specified earlier that it's a factory 5-speed
> I'm
> > > working on.
> > >
> > > Thanks,
> > > Sam
> > >
> > > On Wed, Feb 18, 2009 at 1:04 PM, Tony and Lillie
> <
> > > tonyandlillie1 at earthlink.net> wrote:
> > >
> > > > On an automatic car, the TPS is only used
> for
> > > transmission functions, other
> > > > than full throttle and idle signals.
> > > >
> > > > The first things I'd check are the
> connections on
> > > the TPS, MAF, and unplug
> > > > teh O2 sensor, and see what, if anything,
> changes. If
> > > you do end up needing
> > > > a TPS, I'd suspect Ron may very well
> have one, and
> > > I may if I do some
> > > > digging for that matter.
> > > >
> > > > Tony
> > > >
> > > > ----- Original Message ----- From:
> "Samuel
> > > Mrowka" <smrowka at gmail.com>
> > > > To: <v8 at audifans.com>
> > > > Sent: Wednesday, February 18, 2009 10:05 AM
> > > > Subject: [V8] TPS & Not-so-smooth Engine
> > > >
> > > >
> > > >  Where can you buy a new throttle position
> sensor? Are
> > > they only sold at
> > > >> the
> > > >> dealer?
> > > >>
> > > >> Also, what other components should I
> check for a
> > > PT engine with these
> > > >> symptoms:
> > > >>
> > > >> 1. Greatly increased fuel consumption
> (only 200
> > > miles a tank).
> > > >> 2. Hesitation, in the 1000 - 2500 RPM
> range (most
> > > noticeable on gear
> > > >> changes), unless the throttle is greatly
> > > increased.
> > > >> 3. Stuttering, in the same RPM range,
> unless the
> > > throttle is greatly
> > > >> increased.
> > > >> 4. Often frozen trip computer/MPG
> indicator.
> > > >> 5. Sometimes, complete power loss unless
> the
> > > throttle is increased
> > > >> slightly.
> > > >> Then, a huge, and sudden, jolt of power
> when the
> > > throttle is increased.
> > > >> This
> > > >> problem often disappears with a restart
> > > >>
> > > >> The full-throttle power is there. The
> car has no
> > > issues with starting and
> > > >> also the idle is completely normal.
> > > >>
> > > >> Thanks,
> > > >> Sam
> > > >>
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