After much help from Jeff, I got my throttle linkage to reach my kickdown switch. I realized that not only was my linkage way to sloppy, but at full throttle my primaries were not opening all the way. Now that everything is in order, the car developed a severe bog at full throttle, both from a stop and while driving.

I figure now that everything is opening up all the way, the carb is getting more air and not enough fuel. The engine literally dies at full throttle.

I am going to try to advance my timing, is this a good first step? Any other ideas?

Thanks again Jeff

Like I said on the other thread - it might be a dead accelerator pump.

To test it, have the engine off and cool. Push down on the plunger on the carb. You should feel resistance and hear fuel squirting into the venturies.

Will check ASAP

If you ease into full throttle from cruising speed, does it die? You need a midget with a spray bottle to squirt fuel into your carb when your secondaries open...

...or, rebuild the carb.

Those are very good options. But I dont want to hassle with the midget. If I ease into it, it pulls very very nice!

I think Salmon38 has your issue figured out.

A working accererator pump and kickdown swith?!...its gonna be a whole new experience for you.

I hope so.

So, I will probably have to send it out for the accelerator pump. What does this involve and what can I expect to pay?

Could be the spring tension on the secondary air valve. If it's adjusted too loose, the secondary air valve opens before the engine needs that much air.

The Answer!

I brought it to a trusted friend who works on strip cars. He owns the same shop in the same location that his Dad owned in the 60's. Anyhow, he called me up and told me that my motor mount was broken on "the torque side of the motor" and when I accelerated the motor was lifting against the throttle linkage and shutting the carbs down. He fixed the mount along with the kickdown switch in the tranny!

HOLY CRAP! Is this what a 400 is supposed to be like? I held on for my life during his test drive and was amazed when the car chirped the tires from 1st to 2nd gear. From cruising speed as I punched it, it fell into gear smoothly and PULLED HARD!

I took my wife for a ride when she got home from work and I punched it from a dead stop! NO BOG AT ALL! After the 20+ feet of rubber deposit, the car launched like never before.

Thanks guys for all your help!!!!!

Funny how sometimes something completely unrelated can cause you that much grief! Glad you got it fixed!

I would not have thought of the motor mount in 100 years! The car is totally different!!

Yep, thats what 400's are like

I had a hopped up Ford van YEARS ago break a mount once, as the engine came up it pulled HARDER on the throttle, stuck WOT! Had to shut er down with the key after hanging on for a few hundred yards..LOL

Well, given the choice between the two scenarios, mine seemed a bit safer than yours! But yours was probably much more fun!!!

As an eighteen year old in 1982, I broke a motor mount on my 1969 Camaro, while performing a neutral slam. The engine torqued over and pinned the accelerator linkage to the firewall. Weeeeeeee!

I think this car has unreal power now. But I have a non important question. When I do a manual upshift from 1st to 2nd the rears will chirp. This happens at half throttle and above. It does not chirp with an auto shift from 1st to 2nd no matter where the throttle is. I was just wondering why that is or is the auto tranny set to shift more smoothly. The car has. 3.08 and a shift kit.

Motor mount! WOW. Never would have thought of that. Your fan wasn't hitting your fan schroud when you floored it?

Nope! No external sign of a broken mount

I can get mine to chirp on the automatic upshift. Sound's like I have a similar drivetrain to you. Mine does chirp easier on a manual upshift though.
Glad to hear you got your problem fixed. Strange sometimes what differnt things cause these little problems huh.

Sudden accelearation ,had it twice...both just turned off the key...

first, my stepdads Ford Vedette had a 3 spd on the column, floor mounted gaspedal with a hinge at the floor...one spring (we still had the extra rubber mats that hold snow etc, in the car) I came out of our street towards a traffic circle, floored it in forst ,ready to shift to second....full throttle!
hinge had rusted off and the pedal slid down /in under the floor mat...its scary ,in traffic!

2nd time was 2 yrs later in my Mini Cooper...I had just adjusted the idle , the idle screw had a bend in it...didnt think much of it, turned it half a turn ,test drove...gas hung up some,so I pressed hard...POP!, suddenly full throttle , and stayed there...checking I found that the throttle linkage went very close to that bent idle screw and I made it go past ,even though it basically stopped against it, then it got hung on the other side...
also in traffic in town...

I heard of a Ferarri that in Stockholm once, in the mid 60`s , had a sudden acceleration like that ,and ended up in a tree...that was also a broken engine mount, engine sagged, gave full throttle

It sounds like I was lucky that it broke on the other side. I just cant get over what a different car it is. I have to remember not to blast it every time I take off as I dont want to kill the motor.

The rpm that the engine is turning when shifting automatically at full throttle is determined by the governor. The weights in the governor can be ground down, or lighter springs can be used to make it shift at a higher rpm.