[V8] Re: V8 suddenly running like a coffee grinder above 1700 rpm

[Fedor Veenhuyzen]

First of all, thanks for all your input to everyone! It warms me to see that
so many make an effort to help out...thanks alot!
Well I spent another (3rd) afternoon working on the v8...but...as you can
guess, no change. I started to disconnect the battery for about 15 minutes,
hoping it might reset the ecu. Then I took out the KS on the drivers side to
see how bad it was cracked. Well the plastic housing was cracked completely,
but I don't think that would be a real problem. The KS itself is made of
metal, and it didn't look damaged, but one never knows....
I checked all the wiring again, and the connectors, but couldn't find
anything there either...took all the easy accessable sensors out, cleaned
them.
Anyway, comming monday I'll be able to go to a dealer to connect the car to
a computer...hopefully we'll be able to find something. Its about a 50 miles
drive...haha, and I won't be able to take the freeway...
This is a tip from Joel, and I am putting my hope on that...

Mass air flow sensor.
Tell you what happened to me and why I think it is that.  I took everything
off to replace my TPS, and when I put it back together, it wouldn't run
right about, surprise, 1700 rpm.  Revved like a mutha up until that point.
Took it apart, put old TPS back on, still didn't matter.  I went to tearing
everything apart, and when I was going to take the MAF out (I had cleaned
it), I realized that I hadn't plugged it back in.  (Color me embarrassed!)
I don't know, but it sounds like it might need to be cleaned, a wire went
out, or it needs replacing.


Joel Liggins
'90 V8q
'86 5kcstq

Fedor
'89 V8

----- Original Message ----- 
From: "Ingo Rautenberg" <IRautenberg at comcast.net>
To: "Kent McLean" <kentmclean at mindspring.com>; "Ingo D. Rautenberg"
<ingo at waratap.com>; <v8 at audifans.com>
Sent: Saturday, December 27, 2003 2:48 PM
Subject: [V8] Re: V8 suddenly running like a coffee grinder above 1700 rpm


> True, but usually, while it's down on power, it would be just that-down on
> power.  I believe Fedor's problem is a bit more involved, since it's
> misfiring and losing power.  Won't get no misfiring with retarded ignition
> alone.  Drove mom's "new" v8 this past summer from Kahlifohnia to Colorado
> with a knock sensor that was grounding out (much of it's shielding was
> cracked or missing in key areas).  Power was down, but the car was still
> quite driveable (don't know nothin 'bout no Audi doin no 135 mph by
> Vegas...).  Power was certainly better after insulating the knock sensor
> wire.
>
> Ingo
>
> ----- Original Message ----- 
> From: "Kent McLean" <kentmclean at mindspring.com>
> To: "Ingo D. Rautenberg" <ingo at waratap.com>; <v8 at audifans.com>
> Sent: Friday, December 26, 2003 11:18 PM
> Subject: Re: V8 suddenly running like a coffee grinder above 1700 rpm
>
>
> > Ingo D. Rautenberg wrote:
> > > Sorry, Kent, but the ECU automatically retards timing when one unplugs
> > one
> > > or both knock sensors...BTTT (Been there tried that)
> >
> > I think that's where I was headed. What does it do it
> > the KS is shorted out, i.e. if the wires to the sensor
> > are connected?  If a KS is cracked, and shorted out, it
> > might (would?) cause the ECU to retard the timing,
> > causing poor running above 1700 rpm.  At least, that's
> > my guess.
> >
> > Kent
> >
>
>
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