I have looked everywhere I can think including this site and cannot find a good blow up for a 66 442 4spd throttle linkage.
Ever since I have gotten this car I have had issues getting complete wide open throttle. Everything looks good and together correctly but it appears the gas pedal is too low to be able to push down far enough for wide open. I have adjusted the linkage according to the manual but no help. I don’t know why I should have to do this but can the linkage under the pedal be bent upwards to raise the pedal? I’m afraid to try it because some these parts are case hardened and snap if you try to bend them.
A picture or where to look in the assembly manual would help. I haven’t been able to locate it in the AIM. Thanks.

 

Reach in and bend the arm up under the dash and behind the pedal a little to get full throttle.

 

The assembly manual page is 1-4.8. Print #589998. I replaced mine because the roller on the rod and bracket assembly had a very bad flat spot and wasn't rolling at all on the bottom of the gas pedal. It had also had worn a groove on the gas pedal. There is a post somewhere on this forum about doing a repair by replacing with a roller substitute. I know some other members will chime in on this. I was fortunate to purchase a whole assembly on eBay. I bought an assembly for an automatic. Note on the print that the upper half is interchanged with the Jetaway automatic and manual trans.

Hope this helps.

Wayne

 

Great advice! I have not looked at the roller or the pedal yet. I don’t need a lot. I felt the roller yesterday and it was free but I didn’t check for flat spots. Thanks a lot guys, always helpful people here. I try to reciprocate when I can.

 

Same thing happened to me at first. I had not pulled off the gas peddle to take a look and that is what I noticed. There is no repro roller and axle kit available. I did measure the pieces but I still would not know the original diameter of the roller. BTW I use a White Lithium grease to lube the roller shaft. Keep in touch.

Wayne

 

Here is a link to the 1963 - 70 Oldsmobile Parts Illustration catalog ;
https://classicoldsmobile.com/forums...s-body-147441/
Pay close attention to page C 254 .
You may find the answer there .
I don"t know too much about 66 A bodies , but I do know that all throttle linkage pieces were not the same 4 barrel v.s. 3X2 .

 

Charlie you are correct. Shows on the print "Except L-69". He didn't say it was an L-69 did he? I must have missed that.

Thanks
Wayne

 

Frank,did you check the travel like I requested? Again,take the throttle rod from the ball stud on the center carb. Have somebody press the pedal as far down as they can and open the center carb wide open see where the throttle rod is in relation to the ball stud. If it's not,then there is an issue with either the firewall mechanism and or the inside of the car with the carpet or a bent pedal arm.

 

The only difference between the 4V vs tri carb linkage is the bellcrank and throttle rod. His car has the tri carb bellcrank and the throttle rod looks correct but until he checks the travel,he will not figure out where the problem is.

 

Mike, I had my wife stomp on the pedal while I was outside with the rod popped of the center carb. With the carbs wide open and her stepping on the pedal, the linkage was 1/4” short of popping on the ball so the linkage has enough travel to pull them all open. When I hooked it up again and had her mash on the pedal as hard as she could, the carb won’t open all the way. I’d say everything is about 75% open. I oiled the roller and it has no flat spots, I also glued a piece of aluminum on the back of the pedal, no help. The linkage doesn’t appear to be that sloppy but I don’t know what else to try. I’m thinking if I get a new bell crank and can find a short rod that isn’t too worn maybe that will fix it. This is crazy. Why did they use this damn Rube Goldberg set up anyway.

 

OK,try bending the throttle rod a little more to shorten it. You can bend it back if need be. There is nothing wrong with the design if nothing is bent/broken or out of adjustment.