TB Bump Stop Mod

[bhunter0830]

Does anyone have a sticky on the TB Bump Stop mods?

[tatertot91]

File down the bumpstop and keep checking it on the car. You want to be around 4.6 volts at what i remember being the blue wire (don't quote me on that) If you go to 4.7 volts or above i believe you'll throw an SES light

[pajeff02]

Here are the pics of mine showing before and after measurements and good view of the "step" that I filed into the bumpstop:

[bhunter0830]

Awesome! Thanks
For help guys! Can you elaborate some more on the 4.6volts?

[tatertot91]

One of the wire leads that runs to the throttle positioning sensor sends off a voltage signal, you should be able to stick the end of a multimeter through the back of the plug when the throttle body is plugged in. manually hold the throttle body open while you read the voltage, the more you grind down the higher the voltage will be when the blade is fully open. Ignition has to be on btw

[bhunter0830]

Thanks for the clarification! Doesn't exactly sound like something I want to screw up!

[98TransAmWs-6]

Do aftermarket TBs like my NW 102, need the bump stop mod?

[tatertot91]

Thanks for the clarification! Doesn't exactly sound like something I want to screw up!

no problem, hope it goes smoothly for you. I used a flat file and took my time. Good luck

Do aftermarket TBs like my NW 102, need the bump stop mod?

Assuming its a quality tb there should be no need to grind down the bump stop.

[pajeff02]

no problem, hope it goes smoothly for you. I used a flat file and took my time. Good luck

^^ This. I did not take a voltage reading. Instead, I used my scanner to check the % opening of the throttle.

[98TransAmWs-6]

Assuming its a quality tb there should be no need to grind down the bump stop.

Thanks that answered my question. It's a Nick Williams TB so I would hope for $400 or so it is.