FW: [V8] "Major Surging"

[Maurice Greven]

Historically (in this list) Wasn't is almost always said that surging
was a FPR (Fuel Pressure Regulator) issue? My '90 had a surging issuea
couple of years ago, and it was rectified by replacing the FPR.

Maurice

> -----Original Message-----
> From: v8-bounces at audifans.com
> [mailto:v8-bounces at audifans.com] On Behalf Of Jeremy Ward
> Sent: Sunday, July 18, 2004 8:26 AM
> To: BBlake1055 at aol.com; v8 at audifans.com
> Subject: RE: [V8] "Major Surging"
> 
> 
> Makes sense to me.  Although I haven't had any experience
> with this myself, it has been a popular topic from time to time.
> 
> I think it was Keith that told us that a '93 Ford F150 5.0L
> Oxygen sensor works great in the V8 for much less money than 
> the same Bosch O2 sensor from the Audi dealership. The Ford 
> uses 2 of these sensors, but our V8s will only need one. This 
> is a 4 wire sensor however (Audi is 3 wire); the extra wire 
> is a dedicated ground wire and must be hooked up.
> 
> It is located on the exhaust 'X' near the transmission.
> 
> Symptoms (as you know) are surging power and poor gas mileage.
> 
> A buddy at work told me that you can test your O2 sensor with
> instructions found on the internet.  Do a search on Google 
> for oxygen sensor test torch.  (I probably wouldn't bother 
> testing it, just replace it.  But if you want to be 100% sure...)
> 
> I have hear that they can be stubborn to remove (due to the
> heat that baby sees), and chances are that it has been 
> replaced in the past, therefore the wires are already spliced.
> 
> Bob, the O2 sensor is one of the more common maintenance
> items...  If it were me, I wouldn't go through the trouble of 
> robbing one from the '92 to try it out in the '90 considering 
> the headache of R&R combined with the fact that they can be 
> found for fairly inexpensive at the Ford dealer, or the auto 
> parts store...
> 
> HTH,
> 
> - Jeremy
> 
> 
> 
> -----Original Message-----
> From: v8-bounces at audifans.com
> [mailto:v8-bounces at audifans.com] On Behalf Of BBlake1055 at aol.com
> Sent: Sunday, July 18, 2004 8:03 AM
> To: v8 at audifans.com
> Subject: Re: [V8] "Major Surging"
> 
> One thing I did notice is that when the engine is cold it
> doesn't seem to have the surging problem.  Would that make a 
> difference with the O2 sensor???
> 
> Bob Blake
> 
> 90' V8
> 91' V8
> 92' V8
> 
> In a message dated 7/17/2004 8:49:54 PM Eastern Daylight
> Time, Kneale Brownson <knotnook at traverse.com> writes:
> 
> >Oxygen sensor????
> >
> >At 08:19 PM 7/17/2004 -0400, BBlake1055 at aol.com wrote:
> >>My 91' has recently developed some major surging problems.
> It use to
> >>be
> >>minimal at 3/4 throttle but now it seems to be there 95% of
> the time.
> >>
> >>I notice when the computer was in the "instant mileage" mode and I
> >>held it
> >>at a steady 65 mph the mileage would bounce back and forth 
> from 28 mpg - to
> >>21 mpg.  it feels as if the fuel pump is tuning on and off.
>  The overall gas
> >>mileage is still ok.
> >>
> >>Any ideas????
> >
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