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Author Topic: So who's noticed this?  (Read 2906 times)

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Taxi_Driver

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So who's noticed this?
« on: 16 August 2007, 19:23:20 »

Not sure the min speed......it certainly doesnt do it at standstill....

Ive tried this at around 30-40mph......

Touch the brakes lightly and keep the brakes lightly applied......then floor the accelerator......you carry on slowing down.....its like the ignition has been cut by the ecu.

Take your foot of the brake while still flooring the accelerator......then after a sec or two power comes back on

I discovered it by accident when trying to bed in new pads a bit faster than normal  ::)

Does it on my Omega auto.....VeccyC man and James's VeccyB man

Anyone else noticed........or am i the only idiot that goes around with throttle and brake on at the same time  ;D or are you all gonna rush and try it  ;D
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JamesV6CDX

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Re: So who's noticed this?
« Reply #1 on: 16 August 2007, 19:40:07 »

I THINK this only works on DBW cars....
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TheBoy

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Re: So who's noticed this?
« Reply #2 on: 16 August 2007, 19:42:44 »

Yes, it will, one reason wire DBW have 2 brake switches
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megaomega123

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Re: So who's noticed this?
« Reply #3 on: 16 August 2007, 20:03:48 »

Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[
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Martin_1962

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Re: So who's noticed this?
« Reply #4 on: 16 August 2007, 20:04:14 »

ANd mine >:(

If you are not careful it can stuff a fast launch
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tunnie

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Re: So who's noticed this?
« Reply #5 on: 16 August 2007, 20:06:17 »

Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

DBW are the later engines (2.2 - 2.6 - 3.2)

The throttle is controlled by the ECU, where as the older ones have a physical cable linkage to the throttle body.

Advantages are it just takes an ECU enable to get cruise working!

DBW cars tend to have a lighter gas pedal, as there is no cable to pull...
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JamesV6CDX

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Re: So who's noticed this?
« Reply #6 on: 16 August 2007, 20:11:06 »

Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

Basically Rob -

One earlier prefacelift cars (like yours), you press the thrrotle pedal in, and it pulls a cable. This cable opens the throttle bodies, allowing the air into the cylinders. The ECU knows the throttle position, from the throttle position sensor, which senses where the butterflies are.

On later cars, there is no cable attached to the throttle pedal. When you press the throttle on one of these cars, it sends an electronic signal, which talks to the engine ECU, and in turn operates a little motor contraption on the throttle body, and then opens it in the same way. This is DBW - Drive by wire. Slightly more effiecient than a cable driven system.

This has many advantages - including no need for an actuator / cable for cruise control ;)

Does this answer your question?



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iggy21uk

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Re: So who's noticed this?
« Reply #7 on: 16 August 2007, 20:11:55 »

Quote
Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

DBW are the later engines (2.2 - 2.6 - 3.2)

The throttle is controlled by the ECU, where as the older ones have a physical cable linkage to the throttle body.

Advantages are it just takes an ECU enable to get cruise working!

DBW cars tend to have a lighter gas pedal, as there is no cable to pull...

Don't have LPG fitted on mine, so it don't think it's going to be lighter?  ::)
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megaomega123

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Re: So who's noticed this?
« Reply #8 on: 16 August 2007, 20:12:43 »

Quote
Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

DBW are the later engines (2.2 - 2.6 - 3.2)

The throttle is controlled by the ECU, where as the older ones have a physical cable linkage to the throttle body.

Advantages are it just takes an ECU enable to get cruise working!

DBW cars tend to have a lighter gas pedal, as there is no cable to pull...

Thanks for that tunnie. I can put that down as today's learn something new everyday  :y
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megaomega123

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Re: So who's noticed this?
« Reply #9 on: 16 August 2007, 20:18:21 »

Quote
Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

Basically Rob -

One earlier prefacelift cars (like yours), you press the thrrotle pedal in, and it pulls a cable. This cable opens the throttle bodies, allowing the air into the cylinders. The ECU knows the throttle position, from the throttle position sensor, which senses where the butterflies are.

On later cars, there is no cable attached to the throttle pedal. When you press the throttle on one of these cars, it sends an electronic signal, which talks to the engine ECU, and in turn operates a little motor contraption on the throttle body, and then opens it in the same way. This is DBW - Drive by wire. Slightly more effiecient than a cable driven system.

This has many advantages - including no need for an actuator / cable for cruise control ;)

Does this answer your question?




Cheers James.  I think I have got it now. So I have Drive By Cable not Drive By Wire.
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TheBoy

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Re: So who's noticed this?
« Reply #10 on: 16 August 2007, 20:34:11 »

Quote
Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

Basically Rob -

One earlier prefacelift cars (like yours), you press the thrrotle pedal in, and it pulls a cable. This cable opens the throttle bodies, allowing the air into the cylinders. The ECU knows the throttle position, from the throttle position sensor, which senses where the butterflies are.

On later cars, there is no cable attached to the throttle pedal. When you press the throttle on one of these cars, it sends an electronic signal, which talks to the engine ECU, and in turn operates a little motor contraption on the throttle body, and then opens it in the same way. This is DBW - Drive by wire. Slightly more effiecient than a cable driven system.

This has many advantages - including no need for an actuator / cable for cruise control ;)

Does this answer your question?

Both have advantages/disadvantages, neither is better than other.  It is a brave man who says one is more efficient than the other.

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JamesV6CDX

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Re: So who's noticed this?
« Reply #11 on: 16 August 2007, 21:04:07 »

Quote
Quote
Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

Basically Rob -

One earlier prefacelift cars (like yours), you press the thrrotle pedal in, and it pulls a cable. This cable opens the throttle bodies, allowing the air into the cylinders. The ECU knows the throttle position, from the throttle position sensor, which senses where the butterflies are.

On later cars, there is no cable attached to the throttle pedal. When you press the throttle on one of these cars, it sends an electronic signal, which talks to the engine ECU, and in turn operates a little motor contraption on the throttle body, and then opens it in the same way. This is DBW - Drive by wire. Slightly more effiecient than a cable driven system.

This has many advantages - including no need for an actuator / cable for cruise control ;)

Does this answer your question?

Both have advantages/disadvantages, neither is better than other.  It is a brave man who says one is more efficient than the other.


I guess each to their own opinion, but I like DBW :)
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TheBoy

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Re: So who's noticed this?
« Reply #12 on: 16 August 2007, 21:08:40 »

Quote
Quote
Quote
Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

Basically Rob -

One earlier prefacelift cars (like yours), you press the thrrotle pedal in, and it pulls a cable. This cable opens the throttle bodies, allowing the air into the cylinders. The ECU knows the throttle position, from the throttle position sensor, which senses where the butterflies are.

On later cars, there is no cable attached to the throttle pedal. When you press the throttle on one of these cars, it sends an electronic signal, which talks to the engine ECU, and in turn operates a little motor contraption on the throttle body, and then opens it in the same way. This is DBW - Drive by wire. Slightly more effiecient than a cable driven system.

This has many advantages - including no need for an actuator / cable for cruise control ;)

Does this answer your question?

Both have advantages/disadvantages, neither is better than other.  It is a brave man who says one is more efficient than the other.


I guess each to their own opinion, but I like DBW :)
Can't really think of any advantages of DBW. Easy cruise enable with right equipment. Less clutter under bonnet perhaps?

Can think of lots of disadvantages, esp after seeing a couple fail.  Also, can't blip the throttle when working under bonnet is a pain.
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JamesV6CDX

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Re: So who's noticed this?
« Reply #13 on: 16 August 2007, 21:13:55 »

Quote
Quote
Quote
Quote
Quote
Might sound a bit dim but is it possible to have a simple explanation of Drive By Wire. Have I got it or not. Advantages and disadvantages?  :-[

Basically Rob -

One earlier prefacelift cars (like yours), you press the thrrotle pedal in, and it pulls a cable. This cable opens the throttle bodies, allowing the air into the cylinders. The ECU knows the throttle position, from the throttle position sensor, which senses where the butterflies are.

On later cars, there is no cable attached to the throttle pedal. When you press the throttle on one of these cars, it sends an electronic signal, which talks to the engine ECU, and in turn operates a little motor contraption on the throttle body, and then opens it in the same way. This is DBW - Drive by wire. Slightly more effiecient than a cable driven system.

This has many advantages - including no need for an actuator / cable for cruise control ;)

Does this answer your question?

Both have advantages/disadvantages, neither is better than other.  It is a brave man who says one is more efficient than the other.


I guess each to their own opinion, but I like DBW :)
Can't really think of any advantages of DBW. Easy cruise enable with right equipment. Less clutter under bonnet perhaps?

Can think of lots of disadvantages, esp after seeing a couple fail.  Also, can't blip the throttle when working under bonnet is a pain.

Yep, I will agree that it's a PITA not being able to blip throttle when working on the car. It's also a lot easier just to pop off a connector, than to remove the throttle cable, cruise cable, and their associated mounting brackets etc.

I guess if one was to be really picky, you could say DBW is safer. I'll never forget in my old P reg Elite (before I joined here), I floored the gas once, let my foot off - and it kept racing! (Cable problem).

I will also agree that, if DBW motor fails, it's not funny!




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TheBoy

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Re: So who's noticed this?
« Reply #14 on: 16 August 2007, 21:17:40 »

Quote
Yep, I will agree that it's a PITA not being able to blip throttle when working on the car. It's also a lot easier just to pop off a connector, than to remove the throttle cable, cruise cable, and their associated mounting brackets etc.

I guess if one was to be really picky, you could say DBW is safer. I'll never forget in my old P reg Elite (before I joined here), I floored the gas once, let my foot off - and it kept racing! (Cable problem).

I will also agree that, if DBW motor fails, it's not funny!
Our old works vans, back in the 80s use to have those crappy thick mats which the accelerator could jam in, keeping throttle hard pinned to floor....   ...soon got used to putting foot under and lifting when it happened....
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