Hey everyone... my mustang has been running great, so it's been a few months.

Recently I took it out and when I accelerated, the throttle got stuck at a high RPM. I put on my brake and slowed down, but my engine kept pushing. I threw it into park, and of course, the rpms increased, until I turned it off. I was stuck at a red light, ran out, opened the hood, and fiddled with the throttle linkage at the carb. Came back, and it turned on just like normal.

Since then the same thing has happened maybe 3-4 times. Luckily each time I'm in a place where I can pull off, and not be in danger.

I'm curious if you might know what is causing this, but I'm sure you might need more information. Aside from pulling off my air cleaner and fiddling with the throttle linkage, it appears to be in the exact same condition as when it all got stuck. Any ideas?

 

Well, you need to figure out why it's getting stuck. Either the carb itself is binding up somewhere, or the linkage is.

Disconnect the cable and return springfrom the carb and move the carb linkage around to see if there's any binding. It could be there's carbon buildup around the throttle plates preventing them from closing, or could be the shaft is binding. Also check the accelerator cableand see if it's binding internally somewhere.

While you're at it, I'd strongly recommend picking up an aftermarket dual throttle return spring set from your nearest chain parts store. Running two return springs is a good idea, on and off the track.

 

I'd bet its the return spring. They stretch out and can put you at higher RPM's than you want. Ive had a few problems with them in the past personally. Luckily with a manual, you just throw in the clutch and pull over. Just put it in neutral, have a buddy push the throttle in and out, and stick ur head under the hood and see where its catching/binding/not returning. Should be an easy fix.

 

Is it an edelbrock ? Had pins catch the flat bar on the throttle for the rod. Just barely hangs up. Enough to put it over 4k though.