unit213

Anyone have directions to do the throttle body bump stop mod with a voltmeter? I ran a search and I guess the web page listed below has some, but it won't open for me.

http://www.jacksonville.net/~eboggs/TBA.htm

Can anyone help? Thanks.

Dan

dfarmercse

I couldn't open it either. I would also like to know since I know my TB is not open all the way.

unit213

Mine is pretty close to 90%. If I had to guess, I'd say it's 84-85% open. You know the story..."every little bit helps."

Can anyone help us here? I'd like to do this sometime this weekend.

dfarmercse

I am not sure how far mine opens, but you can see it is not 90.

Z-Master

The only way to do it right is to use AutoTap to avoid tripping an engine code.

unit213

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Z-Master:
<strong>The only way to do it right is to use AutoTap to avoid tripping an engine code.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Correct me if I'm wrong, but I'm pretty sure that the older versions of ATAP didn't show the throttle body blade position in terms of percentage. It showed it in terms of voltage with 4.7v being 90%. Anything over 4.7 volts throws a code. I would like to set mine to 4.6v.

Anyone else have any feedback?

SSLoneStar

Heres the REAL Bump Stop Mod !!!
http://home.att.net/~m.shaner/wsb/ht...ome.html-.html

unit213

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SSLoneStar:
<strong>Heres the REAL Bump Stop Mod !!!
http://home.att.net/~m.shaner/wsb/ht...ome.html-.html</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Don't you mean the EXPENSIVE bump stop mod?

I know there's someone out there who can help...

unit213

I just had my lid, MAF, and Fernco tube off today. I checked out the throttle blade position. I need to do this mod. It's nowhere near 90%.
I'm going to pick up a voltmeter tomorrow and I'll give it a shot.

I know nothing about electrical issues (whispering, damn I should've paid attention in Phyiscs).

Thanks for the help ND4SPD. I apprecitate it.
Still, if anyone has a link to some instructions that would be awesome!

unit213

Is this done with the engine running?

SSLoneStar

Those that have done it will tell you its worth twice as much. Unless maybe hundreds of us are just full of it ?
Awesome must do mod <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ND4SPD:
<strong>Hey Guys!

I did the mod with my voltmeter. You simply have to probe the TPS plug like a potentiometer. I stopped @ 4.65vdc. Absolutely no codes and looks as if the blade is 90 degrees. If you go to far, don't worry. You can use JB weld, liquid aluminum, bend the cam tab etc....
If you have tcs you will have to re-adjust (shorten) throttle cable length as it probably won't pull back enough to hit the bumpstop if you don't.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

ND4SPD

Hey Guys!

I did the mod with my voltmeter. You simply have to probe the TPS plug like a potentiometer. I stopped @ 4.65vdc. Absolutely no codes and looks as if the blade is 90 degrees. If you go to far, don't worry. You can use JB weld, liquid aluminum, bend the cam tab etc....
If you have tcs you will have to re-adjust (shorten) throttle cable length as it probably won't pull back enough to hit the bumpstop if you don't.

Z-Master

Here'whay you are looking for..

http://www.installuniversity.com/ins..._bump_stop.htm

Later versions of A-tap show the position in degrees.

ND4SPD

You do not have to have engine running, only ignition on so power is supplied to TPS.

Disconnect plug from TPS on opposite side of throttlebody. Pull back the rubber insulation so that you can place (3) small gauge wires in each of the (3) holes. Now you have to connect plug back to TPS but will have (3) wires sticking out. Turn on Ignition keeping wires separated (not touching one another). The 3 wires are for voltage, ground, and variable voltage. You need to hook the two voltmeter leads to two of the three wires. Hook one voltmeter lead to the blue (variable voltage) and the other lead to one of the other two wires. When you have this correct your voltmeter will vary from 0-5 volts when turning throttle blade manually. Now just grind stop and keep checking voltage with throttle held wide open to bumpstop until you reach desired voltage. I went 4.65vdc. Over 4.7 will set code so be conservative near the end. Mine went from about 78 deg. (4.41vdc) to about 90 deg. (4.65vdc) when done. If you have tcs you may have to adjust throttle cable length depending on how far you go with the bumpstop mod. I had to.
I hope this helps!

ND4SPD

I think the link ZMaster is referring to requires autotap. I believe you wanted to do it with a voltmeter which is what I used and the procedure I described above as I do not have autotap.

unit213

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ND4SPD:
<strong>You do not have to have engine running, only ignition on so power is supplied to TPS.

Disconnect plug from TPS on opposite side of throttlebody. Pull back the rubber insulation so that you can place (3) small gauge wires in each of the (3) holes. Now you have to connect plug back to TPS but will have (3) wires sticking out. Turn on Ignition keeping wires separated (not touching one another). The 3 wires are for voltage, ground, and variable voltage. You need to hook the two voltmeter leads to two of the three wires. Hook one voltmeter lead to the blue (variable voltage) and the other lead to one of the other two wires. When you have this correct your voltmeter will vary from 0-5 volts when turning throttle blade manually. Now just grind stop and keep checking voltage with throttle held wide open to bumpstop until you reach desired voltage. I went 4.65vdc. Over 4.7 will set code so be conservative near the end. Mine went from about 78 deg. (4.41vdc) to about 90 deg. (4.65vdc) when done. If you have tcs you may have to adjust throttle cable length depending on how far you go with the bumpstop mod. I had to.
I hope this helps!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thank You! That is the reply I was waiting for. I'll try it out this afternoon.

Dan

unit213

Ok, I'm at 4.24v. I'm going to start grinding the bump stop. I'll post my final results.

ND4SPD

Glad I could help.

Remember if you do go to far, you can always add jb weld, liquid aluminum, bend tab or what I was thinking of is to tap a small hole through bumpstop and make it adjustable by turning a screw.
Good Luck with the grinding Dan!

ND4SPD

Oh BTW, 4.24v! Wow that is low. I bet that only gave you about 70 degrees of throttle plate opening. This mod should definitely help you. Mine was stock at 4.41v!!!
<img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

unit213

ND4SPD:

Ok, now I'm up to 4.63v. I'm going to stop just to be on the safe side. My throttle cable is too long now. How do I shorten it?