Bumpstop mod
Thread Starter
Staging Lane
Joined: Jul 2006
Posts: 81
Likes: 0
From: Atl. ga
Bumpstop mod Last night I gave this mod a try. I hooked up my voltmeter to the blue wire on the throttle position sensor, turned the key switch to the on position. At the idle position it's .054 volts. WOT the voltage is 4.38. I'm grinding the back of the stop trying to get voltage to 4.68, Which is real close to 90 degrees. For some reason I can't get the voltage above 4.39. Anyone know why. Thanks.
Thread Starter
Staging Lane
Joined: Jul 2006
Posts: 81
Likes: 0
From: Atl. ga
I finally got the voltage up. Had to use a different tool on my die grinder.I just went out and checked for that, and my pedal is not under the floormat. I can get the voltage to 4.68 when I manually open the throttle, when inside pressing it down it only goes to 4.52. It's like the cable is not pulling in completely on the stop. The car is a 00 Z28 with traction and cruise control. There is a small black box that is mounted behind the battery. I removed the cover looking for a place to adjust the cable. Only thing behind the cover is two wheels that operate with the throttle cable. I did not see anywhere to give me more travel of the cable. Any ideas? 
just add a couple zip ties on the cable that comes through the pedal bracket. Place the zip ties right after the bracket and before the plastic retainer at the end of the cable. It will make the cable shorter and will allow you to get WOT without getting close to the carpet. i have done this on a couple cars before, you could also try and take some of the backing off the carpet to make it thinner but i would say just use the zip ties.
Originally Posted by Smokin87TA
just add a couple zip ties on the cable that comes through the pedal bracket. Place the zip ties right after the bracket and before the plastic retainer at the end of the cable. It will make the cable shorter and will allow you to get WOT without getting close to the carpet. i have done this on a couple cars before, you could also try and take some of the backing off the carpet to make it thinner but i would say just use the zip ties.
That might be the throttle cable for cars with traction control because they use 2 diffenert cables from gm, but both of the cables on my cars(non traction control) do not have an adjustment like that. I know what you are talking about tho becasue i have seen them on other cars before.
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Originally Posted by Smokin87TA
That might be the throttle cable for cars with traction control because they use 2 diffenert cables from gm, but both of the cables on my cars(non traction control) do not have an adjustment like that. I know what you are talking about tho becasue i have seen them on other cars before.
Thats great, but he said in his post that he has traction and cruise.
Originally Posted by fatjet00
I finally got the voltage up. Had to use a different tool on my die grinder.I just went out and checked for that, and my pedal is not under the floormat. I can get the voltage to 4.68 when I manually open the throttle, when inside pressing it down it only goes to 4.52. It's like the cable is not pulling in completely on the stop. The car is a 00 Z28 with traction and cruise control. There is a small black box that is mounted behind the battery. I removed the cover looking for a place to adjust the cable. Only thing behind the cover is two wheels that operate with the throttle cable. I did not see anywhere to give me more travel of the cable. Any ideas?
Thread Starter
Staging Lane
Joined: Jul 2006
Posts: 81
Likes: 0
From: Atl. ga
No the throttle closes just fine. The problem I'm having is I can't get the throttle all the way up against the stop on throttle body. I adjusted it with the little black things on the cable itself going to the throttle body and either I have it too tight, and when you let off the gas pedal it doesn't return to the fully closed position. It appears my cable going to tb is a tad too short. I noticed there are two of the adjusters, maybe I ajusted the wrong one.