Home | Register | FAQ | Members List | Calendar | Today's Posts | Search |
Social Groups |
Registered
Members: 14,972 | Total Threads: 40,057 | Total Posts: 470,834 Currently Active Users: 872 (29 members and 843 guests) Welcome to our newest member, ikuehaxoxo |
|
|
Thread Tools | Display Modes |
30-09-12, 08:40 PM | #1 | |
Grown up member
Join Date: Dec 2011
Location: Plymouth , Devon
Posts: 42
|
WOT switch
Hi all , erm my quattro has no lever on its WOT switch assembly!! exactly what would this do to the car if it were intact, i believe it is an enrichment device.... so would it give the car a bit more punch?
|
|
30-09-12, 08:48 PM | #2 |
Grown up member
Classic Audi Club Member
Join Date: Jul 2011
Location: Loughborough & Lincoln
Posts: 662
|
Overrides the fuelling signal from the ECU to enrich at WOT as you say
|
04-10-12, 08:20 PM | #3 |
Grown up member
Join Date: Dec 2011
Location: Plymouth , Devon
Posts: 42
|
ok thanks, does anyone know any reason why the lever part would be missing?? i.e do people take them off for any reason or has it just fallen off at some stage?
|
04-10-12, 08:26 PM | #4 |
Trickster
Classic Audi Club Member
Join Date: May 2009
Location: Heckling from the cheap seats, Phnom Penh, KoW
Posts: 7,006
|
The lever may well have been damaged during some previous work. I found mine, not sure whether idle or WOT, trapped in an odd position.
The micro switch is virtually the same as the one on the idle position. You might be able to make one. The mounting points of those switches is different from currently available microswitches, so a direct replacement kind of needs to be the same type. For now.
__________________
I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor |
05-10-12, 05:03 AM | #5 |
4 ring whore!
Join Date: Jun 2008
Location: Rucava, Latvija
Posts: 3,816
|
In past when I installed 3A engine in my previous A80, found that someone had removed from throttle of that engine that arm which actuates WOT switch - way later figured out that most likely was quick'n'dirty fix for dead knock sensor - ignition adjusted late and WOT switch disabled as otherwise when accelerating the ignition would become too late.
But in your case sounds more like accident. |
05-10-12, 07:05 AM | #6 |
Grown up member
Classic Audi Club Member
Join Date: Feb 2011
Posts: 239
|
I am assuming that we are talking WR engined quattro turbo here. The WOT switch does not override the fuelling signal from the ECU, there is no such thing. The fuelling on a WR is entirely mechanical in its workings, the ECU has no bearing whatsoever on fuelling, it merely adjusts timing. The WOT switch should be permanently life fed when the ignition is on, when the lever travels sufficiently far around the arc of the throttle plate (at about 55 degrees) it activates the microswitch which triggers the solenoid valve on the bulkhead. This changes the vacuum applied to the warm up / control pressure regulator to enrich the mixture. Without the actuator lever the switch cannot be triggered hence no mixture enrichment as the revs rise causing the engine to run lean. This creates the potential for higher combustion temperatures, predetonation and melting of pistons. Spoiling your enjoyment, cars performance and engine though not necessarily in that order.
__________________
Roger Galvin Chairman & Technical Secretary, qOC quattro Workshop |
05-10-12, 07:56 AM | #7 |
Trickster
Classic Audi Club Member
Join Date: May 2009
Location: Heckling from the cheap seats, Phnom Penh, KoW
Posts: 7,006
|
Might not be a bad idea to post up a photo of what's there. It might simply be a case of changing the microswitch, if you can get hold of one.
I know I have old ones in a box, but they are u/s internally. Mechanically working, but high resistance across the contacts.
__________________
I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor |
05-10-12, 09:20 AM | #8 | |
Ragtop Collector
Classic Audi Club Member
Join Date: Nov 2010
Location: Chorley
Posts: 1,463
|
Quote:
__________________
"Earl" 1998 2.8 V6 Cabriolet "The Duke" 1997 2.6 V6 Cabriolet (Sold....sadly) Project "Best of Both Worlds" 1995 S2 Quattro Cabriolet |
|
05-10-12, 11:14 AM | #9 |
4 ring whore!
Join Date: Jun 2008
Location: Rucava, Latvija
Posts: 3,816
|
Author of this thread has pictures of B3 CQ with NG engine in his album
|
11-10-12, 06:18 PM | #10 |
Grown up member
Join Date: Dec 2011
Location: Plymouth , Devon
Posts: 42
|
sorry ive been away for a bit, its a 1990 coupe quattro 2.3 ng i have made a lever up now so may work i guess .. thanks for all your replies
|
Bookmarks |
Tags |
b3., coupe, ng. |
|
|