[V8] Ecu code, cats

Thu Sep 1 16:59:42 EDT 2005

The ABH had EGR if it had california emissions.

----- Original Message ----- 
From: "Jeremy Ward" <jward.v8 at gmail.com>
To: "'Coleman, David'" <David.Coleman at blackrock.com>; <v8 at audifans.com>
Sent: Thursday, September 01, 2005 9:59 AM
Subject: Re: [V8] Ecu code, cats

> Hmmm.  I know the 4.2 has a different setup than the 3.6 and you have to 
> do
> a 'trick' when you transplant one (but I don't know what that is...)  I
> believe the ABH uses an EGR setup, there the PT just has a charcoal
> canister.  Anyone care to comment?
>
> On the 3.6, you have 2 vacuum lines coming off of the throttle body; one
> big, one small.  They both go over and disappear under the coolant
> reservoir, into a frequency valve / diaphragm thingy (I am sure that is 
> the
> technical term they use in the manual!)  The big goes into the end closest
> to the firewall, the small goes into the bottom of it.  There is an
> electrical connector (looks like a 2 or possibly a 3 wire hookup). 
> Lastly,
> there is a 3rd (same size as the large input) line that goes to the 
> charcoal
> canister.
>
> There is also a vacuum line coming off the rear of the engine that 
> controls
> the climate control - specifically opens and closes vents with its vacuum
> power.  This one shouldn't have any thing to do with your issue, but if it
> is totally disconnected the dash vents work funny and the car also 
> stumbles
> at idle.
>
> A few years back, I replaced all of the vacuum hoses and put hose clamps 
> on
> both ends of each hose.  I think this set me back a whole ten bucks and 
> made
> a big difference.  If you have a vacuum leak, then your mileage will be in
> the toilet, car will stumble on idle, and the ISV may throw a code because
> it can't keep up with the huge loss in vacuum.  You will also hear a
> distinct 'whistle' to let you know you have a vacuum leak. ;-)
>
> If you need pictures, let me know and I can shoot them tonight.
>
> Good luck!
>
> - Jeremy
> www.MyV8Q.com
>
> -----Original Message-----
> From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf 
> Of
> Coleman, David
> Sent: Thursday, September 01, 2005 1:20 AM
> To: v8 at audifans.com
> Subject: [V8] Ecu code, cats
>
> Ok it's now 3:ep am eastern. Here's what I've worked thru:
>
> That 2324 (ecu ground, bad ecu) still there. I checked black plastic 
> doodad
> hanging from the 2 vac lines. Manual shows it as 1/2 of the frequency 
> valve
> / control for the carbon canister. Other half still suspended by 2 
> spubbies
> in the r/s fender. Maybe a vac leak and I'm good. Refit the halves 
> together,
> start car, no diff -- barely idles, falls flat under heavy-ish throttle
> input (bad cat symptom), black/grey smoke out pipe, and odorless sooty 
> water
> spritzing out the pipe.
>
> So I do the output tests (fuses good): all 8 injectors click away, ISV
> clunks open/shut, move to charcoal canistertest and nothing. Correct 4431
> blinking out but no indication the canister is actuating. Hand on
> freq/control solenoid feels nothing. Though sjm says canister is "behind &
> under cyl head", only thing I see there is exh manifold. Bentley puts it
> behind r/f fender, which makes sense with hose disappearing back up there.
> Reach up as far as I can, no canister or sense of actuation.  Meanwile the
> isv making a humming noise. Whatever, last output test shows cleared ecu.
> Redo procedure, same result. I trace the freq valve solenoid wire and find 
> a
> breach where they'd been rubbing against a surge tank bolt.
> Cut back sheathing back and wrap wires in elec tape.  Start up, no diff,
> same 2324 code. Run output tests again, and still no faint indication of
> canister actuating, and I'm not pulling the fender liner in search of it
> tonight.
>
> Start car, same deal. Test light shows power at freq valve connector. 
> While
> there unplug ECT sensor behind head and car dies. Restart, now throws 2231
> ISV, which tests good at connector. But ECT connector shows NO power.
>
> It's late. Todo: check proper ecu pin(s) for ect. Pull O2 wire out, and 
> swap
> in used isv, maybe MAF too.
>
> If you made it this far, please feel free to chime in especially re: no 
> ECT
> power.  Sure CAT situ needs sorted, but really looks like another issue is
> at hand..
>
> I heart feedback
>
> DaveC.
>
>
>
>
>
> --------------------------
> David A. Coleman
> BlackRock
> Sent via BlackBerry Wireless
>
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