When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I've looked through the threads and haven't seen this particular issue addressed. I just installed an FITech Go EFI. The unit is still learning, but has quickly come up to speed. Everything about it is positive, with one exception, totally unrelated to the FITech system itself.
My car is a '69, original 4-speed with the cable throttle linkage. No matter what I do, I can't get the cable to accommodate full travel at the throttle body. With the pedal to the floor, it's about 3/16" of cable travel short to get to WOT. If I try to fudge the cable lockdown location to enable it to get to WOT, then there isn't enough slack to allow it to return to idle.
I took it to the local speed shop, and they didn't have a solution. At best, they're talking about having to replace everything from the gas pedal to the end of the cable.
Clip on fishing weight. Drill a small hole and clamp it on. See if the takes up the slack.
I'm waiting for my new cable to arrive.
Cable's not that old, and the issue isn't cable length. The cable can only move (these are hypothetical numbers / approximations) three inches and I need 3 3/16" travel to get the butterflies to WOT. The 3/16" fraction is not an approximation -- that's how much short of WTO I am. Per the previous answer (Richard454), some sort of bell crank that trades slightly increased effort (due to reduced mechanical advantage) for a little more movement might do the trick. I'm hoping to get a look at his setup. Thanks.
I recently discover I have the same issue on my 69 with a 350/350. I have not had time to dig into the solution. Please keep me (us) posted on how you resolve the issue. I thought I was just going to modify the bracket position that holds the cable? Maybe you will find a better solution. Thank you.
My car is a '69, original 4-speed with the cable throttle linkage. No matter what I do, I can't get the cable to accommodate full travel at the throttle body. With the pedal to the floor, it's about 3/16" of cable travel short to get to WOT. If I try to fudge the cable lockdown location to enable it to get to WOT, then there isn't enough slack to allow it to return to idle.
I took it to the local speed shop, and they didn't have a solution. At best, they're talking about having to replace everything from the gas pedal to the end of the cable.
OK..I looked at the FITech- just standard carb linkage.
Can you not move the throttle cable to the lower hole...If you are already using the lower hole you could drill another one lower. That shouldl get you the more throttle movement you need...
If you can't solve it by using one of the lower holes on the linkage then your actual pedal is probably bent. Many of us have found this to be a problem (I did on mine) even when using a carb. Solution is to take out the pedal arm, put more bend back into it, and reinstall. If you do a search on this you should find a few hits. I think Jim (427HotRod) had a post about it a few years ago.
Had the same problem on the 68 L-71 tri-power. The 68-69 stamped steel linkages tend to bend. Got a 73 underdash linkage which is made of beefier roundstock that doesn't bend and flex, problem solved.
Throttle linkage for FITech
DSCN5168 by Richard Hayes, on Flickr
