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Alfred Heng
TryHard
WA
V8 GT Limited

Posts: 206
Reg: 02-2006

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Tuesday, April 04, 2006 - 09:19 pm, by:  Alfred Heng (Alfred) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I had disconnected my battery when I first got the car in an attempt to reset the ECU and since then the exhaust smells of fuel. I remember reading that when the ECU is reset, the mixture is slightly rich and you will have to give the car a few quick run to teach the ECU the leaner settings.

Well, I did not do that at that time, so my question now is, will I have to reset the ECU again or can I now just give it a few quick runs, will that be enough to lean out the settings?
Dragan Vidic
TryHard
Vic
soarer tt

Posts: 364
Reg: 07-2005

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Wednesday, April 05, 2006 - 03:37 am, by:  Dragan Vidic (Soarer_ttt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

drive the car so that its warm, pull over on the side of the road where you can gun it, reset it, get back in and put your foot down to about 100. stop and floor it a few times, again to about 100 and you're done ....just take out the green fuse instead of disconnecting the battery
Callum Finch
DieHard
WA
Soarer TT

Posts: 869
Reg: 09-2005

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Wednesday, April 05, 2006 - 07:12 pm, by:  Callum Finch (Sigeneat) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Your overflow tube for your fuel tank may have popped out of its little hole also...

You should be able to get to it behind the boot lining on the fuel tank side.. there is a pipe there, quite obvious =P
Alfred Heng
TryHard
WA
V8 GT Limited

Posts: 210
Reg: 02-2006

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Wednesday, April 05, 2006 - 08:47 pm, by:  Alfred Heng (Alfred) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I am pretty sure that it is not the overflow tube as it only happens when the car is started and the smell is only outside the car.
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4056
Reg: 11-2004

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Thursday, April 06, 2006 - 01:17 am, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

They usually do go rich for starting. If the smell goes away pretty quickly, then forget about it. Just leave your windows shut for a minute when starting.
Alfred Heng
TryHard
WA
V8 GT Limited

Posts: 212
Reg: 02-2006

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Thursday, April 06, 2006 - 08:21 am, by:  Alfred Heng (Alfred) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks for that. Yes I notice it only on the first start up, after that it seems fine.
Damien Smith
TryHard
NSW
Manual UZZ31

Posts: 468
Reg: 07-2005

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Thursday, April 06, 2006 - 12:38 pm, by:  Damien Smith (Damien) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Up to about 94 (I'm sure Neil will correct me if I'm wrong here) the V8 had an extra cold start injector which poked up into the middle of the plenum. When the car first starts the injector switches on and it sprays extra fuel into the airstream. Plus the fuel table is richer when the engine is colder and gradually leans out to the normal mixture as the engine gets to operating temperature.

This is worth keeping in mind for anyone playing with piggyback fuel computers - the engine needs to be at operating temperature before tuning can begin.

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