MAZDA 3 Throttle

[knewman]

Iam interested in finding out what kind of linkage the M3 2.3 engine has between the gas peddle and the engine. Mine seems to have a mind of its own, whatever it is. At low rpms the throttle response seems delayed eg. when I lift the gas very lightly, there is no response for a sec. then the engine rpm will drop causing a jurking of the car, this happens when throttle up or down is done, but only when slight pressure is applied to the gas peddle. Has anyone else found this problem and if so what is the fix?
Thanks for your help (wrc)

 

[goldwing2000]

There is no "linkage" whatsoever. The car is equipped with an electronic throttle body.

The loud pedal has a position sensor on it which sends a signal to the computer. The computer then sends a signal to the throttle body which activates a servo motor inside the TB. The servo motor opens and closes the throttle plate.

ATX or MTX?

 

[jtallon]

The throttle is 'drive by wire' - from what I understand, there isn't a 'throttle cable' - the pedal sensor feeds a computer, and that computer controls a servo that moves the throttle.

Some here would tell you that grounding the throttle body to the negative terminal on the battery will help. I tried, and it didn't do squat for me. I don't actually find the throttle bad - seems like what you describe is more of a curiousity than something that would actually cause problems when driving...

JMHO.

 

[crossbow]

http://www.mazda3forums.com/viewtopic.php?t=8848&start=0


Extensive thread on grounding the throttle body. Overall, it seems that more then 75% of the people notice an instant difference. Mod cost is roughly 2-5 dollars.

 

[goldwing2000]

Mod cost is roughly 2-5 dollars.

Or less. I just used things I had lying around, so it didn't cost me anything. (thumb)

 

[Da 6]

the lag is mostly felt (drasticly in atx)when trying to launch from idle. if you feather the tb before launch it responds better. I'm running the ground as well.

 

[joepro]

I got curious after reading this thread and decided that at a little over 6$ CDN, it was worth a try... I bought 4 feet of 10 gauge black wire and 2 end connectors. It took me about 15 minutes to cut the wire, crimp the connectors and install it. Now, my mind may be playing tricks on me but it does SEEM smoother in 1st/2nd gear at lower revs and shifting also seems smoother since revs don't SEEM to increase anymore while pressing the clutch. I haven't tried it with the AC on yet but that's where most of the jerking occured in the first place.

 

[knewman]

Thanks

This is a great forum, thank you all for your response, Iam doing the ground mod today, got to give it a try (2thumbs)

 

[Sprousa]

I did the ground mod only because after I read some posts on it I decided to go see how bad the ground actually was...I think the ground is actually comming off the tb servo I took a led with a resistor on it and connected it to the battery posts and then one to the + and one to the TB and there was a noticable diffrence in brightness between the two so I figured it wouldnt hurt to have it ground the same as the rest of the car...I did notice a diffrence though and I actually meterd the diffrence with a volt meter b4 and after it was about .20 volts