Grounding The TB

[fmjhp594]

I know that on some new little import cars that have electronic TB's if you run a new separate ground wire from the TB to the ground on the battery there will be a large difference in the throttle response. I know on the new Z350's and the mazda 6's this will make a difference, but has anyone done this to their truck yet? My friends that did it to their imports used either a #10 or #12 AWG wire and just put it to any bolt thats directly on the TB. I'll probably do it next weekend anyways, but I was wondering what other peoples findings were about this.

[Mighty HD]

I've never heard that.

 

Get a tune from nelson's it'll be instant response then.

[redvett]

The throttle body is not grounded and does no need to be since the motor is grounded by way of the PCM. Grounding the body itself will make no difference.

[builderpaul]

The throttle body is not grounded and does no need to be since the motor is grounded by way of the PCM. Grounding the body itself will make no difference.

 

<{POST_SNAPBACK}>

 

 

 

I think that is the reason for the grounding. The PCM control.

 

This is the first I have heard of this but I could see where it may work. By installing a separate ground you would bypass any type of torque management control the pcm my have.

I would like to try this but already have a tune to get rid of the pcm throttle control (abuse mode and torque management) so I don't know if there will be any difference or not.

If anyone tries this please post results.

[redvett]

The throttle body has no electrical connection to the throttle actuator. Grounding it will not make a difference and will not stop torque management. GM is smarter than that.

[fmjhp594]

redvett is right, i took it apart and saw exactly what he said. I did run the wire anyways from the nut right above the intake tube directly to the battery. very little difference if any. I will say though on the Mazda 6's there is a night and day difference. My guess is that they are mellowing out that motor because it is a 'family' car. It was worth a shot, 10 mins, 2 ring connectors, 2 feet of wire, no big loss on my part.

[Here4u2nv151]

The Acura TSX has a drive by wire feature and it really was a horrible idea for tuning purposes. What drive by wire is that the gas pedal is no longer connected to the throttle cable. The pedal is actually connected to the cars ecu and when a driver steps on the pdeal it sends a electronic signal to the cars ecu. The ecu then repsonds and sends a message to the motor saying how much power to give the motor. This acutally creates a lag in time from stepping on the pedal to time the motor gives power. Because of this system the tuner world is unable to make forced induction kits for the vehicle. All dirve by wire really is a the gas pedal is no longer connected to the throttle cable it is now connected to the ecu. For grouding purposes stick to 8 gauge wire.

[slemmer]

The Acura TSX has a drive by wire feature and it really was a horrible idea for tuning purposes. What drive by wire is that the gas pedal is no longer connected to the throttle cable. The pedal is actually connected to the cars ecu and when a driver steps on the pdeal it sends a electronic signal to the cars ecu. The ecu then repsonds and sends a message to the motor saying how much power to give the motor. This acutally creates a lag in time from stepping on the pedal to time the motor gives power. Because of this system the tuner world is unable to make forced induction kits for the vehicle. All dirve by wire really is a the gas pedal is no longer connected to the throttle cable it is now connected to the ecu. For grouding purposes stick to 8 gauge wire.

 

<{POST_SNAPBACK}>

 

 

 

That probably explains why when I suddenly floor the gas I was feeling a slight delay before the tranny hooked up - much like there was low tranny fluid when in fact it was full.

[fmjhp594]

The Acura TSX has a drive by wire feature and it really was a horrible idea for tuning purposes. What drive by wire is that the gas pedal is no longer connected to the throttle cable. The pedal is actually connected to the cars ecu and when a driver steps on the pdeal it sends a electronic signal to the cars ecu. The ecu then repsonds and sends a message to the motor saying how much power to give the motor. This acutally creates a lag in time from stepping on the pedal to time the motor gives power. Because of this system the tuner world is unable to make forced induction kits for the vehicle. All dirve by wire really is a the gas pedal is no longer connected to the throttle cable it is now connected to the ecu. For grouding purposes stick to 8 gauge wire.

 

<{POST_SNAPBACK}>

 

 

 

That probably explains why when I suddenly floor the gas I was feeling a slight delay before the tranny hooked up - much like there was low tranny fluid when in fact it was full.

 

<{POST_SNAPBACK}>

 

 

 

Thats what was happening on my friends cars. But now I relooked at their cars and saw that the TB is actually insulated from the engine block by plastic connectors, spacers, and seals. Thats why this is a good mod for them, it just gives a better path for the electrical 'open/close' throttle signal to go thru. But as I found out, the TB on my Sierra was already grounded quite well and thus this mod did nothing that was worth while. On other cars/trucks that have electronic throttles it would be something worth trying.