[V8] 5sp VS Auto 3.6 ECU differences?

[Ron Wainwright]

Comments inserted....

--- On Mon, 3/15/10, Tony and Lillie <tonyandlillie1 at earthlink.net> wrote:

> From: Tony and Lillie <tonyandlillie1 at earthlink.net>
> Subject: Re: [V8] 5sp VS Auto 3.6 ECU differences?
> To: "Ron Wainwright" <ron_01056 at yahoo.com>, "urq" <urq at pacbell.net>
> Cc: v8 at audifans.com
> Date: Monday, March 15, 2010, 7:39 PM
> I suspect you are talking about
> Jack's new 5-speed, which needs guide seals unless Dave H
> did them. I know when I drove the car (shortly before he
> sold it) it needed them. When I followed him, it smoked both
> on extended idle and while decelerating.

 No not the same car. 
The setup is similliar though.
91 V8 OE 5sp using the OE 5sp wiring harness and 3.6 ECU.
3.6 Intake, 19lb inj, 
on Bruces ol 4.2 motor from "the Brown turd"
as I remember it he had those heads done.

 If that's not the
> car, then onto this:
> 
> Yes, Auto cars shut off fuel while decelerating, I believe
> down to 1400 RPM. No, it really doesn't make sense that it
> smokes with the auto ECU and not the 5-speed. The kearning
> curve for the ECU is very short, on the order of warmup plus
> about 30 seconds. Either way, what was the reasoning for
> swapping in the auto ecu?

 He sawapped ECU's cause he said he was running lean. Ended up being the fuel filter being clogged. 
And on a side note,

 Why is it I never hear anyone saying there changing there fuel filters?

 Ron

 
> -----Original Message-----
> >Subject: Re: [V8] 5sp VS Auto 3.6 ECU differences?
> >
> >Comments inserted....
> >
> >--- On Mon, 3/15/10, urq <urq at pacbell.net>
> wrote:
> >
> >> From: urq <urq at pacbell.net>
> >> Subject: Re: [V8] 5sp VS Auto 3.6 ECU
> differences?
> >> To: v8 at audifans.com
> >> Date: Monday, March 15, 2010, 11:09 AM
> >> As far as I can tell only the
> >> EPROM.  IME on smoke on decel it doesn't
> >> happen all the time.  Did the person who did the
> test
> >> swap the 5-speed back
> >> in and see the smoke?  
> >
> >He said he got no smoke with the 5sp ECU.
> >
> >>There is one possible
> >> difference, it is something
> >> I've asked but don't remember hearing a response
> ... does
> >> fuel get
> >> completely shut off on an AT car on overrun?  You
> can
> >> tell by the trip
> >> computer instantaneous fuel economy going to
> "----".
> >
> >
> > All so, it's my understanding in such a setup (4.2 5sp
> with 3.6 stuff with bigger inj) that the ECU will have to
> learn what's going on now with the motor.... so the Auto ECU
> might have to learn longer than a 5sp ECU would?
> >
> > Ron
> >
> >> -----Original Message-----
> >> From: v8-bounces at audifans.com
> >> [mailto:v8-bounces at audifans.com]
> >> On Behalf Of
> >> Ron Wainwright
> >> Sent: Monday, March 15, 2010 6:35 AM
> >> To: v8 at audifans.com
> >> Subject: [V8] 5sp VS Auto 3.6 ECU differences?
> >> 
> >> Is there any differences "internally"?
> >> 
> >> It has come to my attention that the 3.6 Auto ECU
> doesn't
> >> cut the fuel off
> >> like the 5sp ECU... 
> >> ... It was told to me that in his 4.2 original 5sp
> car with
> >> 3.6 ECU and
> >> wiring that with the Auto ECU on deceleration he
> got smoke
> >> out the rear
> >> pipes..... but when he put the 5sp ECU in it
> didn't smoke
> >> on
> >> deceleration....does that make sense?
> >> 
> >>  Ron
> >> 91 V8 5sp mit 4.2 aka Black Betty (hibernating)
> >> 91 20020vt 22psi
> >> 
> >> 
> >>       
> >> 
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> >
> >
> >      
> >
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