Had this happen with a friend's wife's Pontiac LeMans. He had disabled the secondaries of the Quadrajet by disconnecting the linkage from the primary to the secondaries at the secondaries. He left the linkage hanging on the primary.

I was pulling onto a freeway after working the "cleanup" shift at UPS about 3am. The car had a large V8 and it got up to freeway speed quickly. But, it didn't want to stop accelerating when let off the accelerator. The hanging linkage had wedged against the intake manifold.

So, I thoughtfully turned the key off, being careful not to lock the steering as well. To my shock the engine ignored my command to shut down.

The big V8 did a good job of heating up the brakes as it took a long hard press to get the car stopped under power, with automatic downshifting as the speed slowly dropped. Sitting stopped on the side of the dark freeway with my back pressed hard against the seat back to hold the car still, the engine was growling against the torque converter trying to pull the car forward.

I sat there with the bitter taste of adrenaline on my tongue and perplexed about what was occuring. I realised that I didn't want to sit there until it ran out of fuel. So, my I'll devised plan was to pop the hood, get the tranny in park and quickly get the coil wire yanked off the distributor cap.

Of course, I knew that park would let that held back engine rev to valve float so I had to move quickly in order to not owe my friend an engine.

Reaching over that screaming engine felt, um just plain suicidal. But the adrenalin overroad what little sense I had as an 18 year old. So I yanked off not only the coil wire, but a chunk of the distributor cap with it.

And nothing changed.

I quickly (but not quickly enough to save a distributor cap from destruction) realized the engine was dieseling. The ignition switch's unresponsiveness should had been acknowledged AND processed.

So, standing near the screaming engine I knew that I needed to get to the carburetor. While nervously spinning the wing nut off the air cleaner cover, I was expecting a connecting to show itself at any minute.

What seemed like 10 minutes of winding down, the engine finally came to a stop after clasping both of my hands over the four barrel carb intake.

So there I stood along the freeway in the wee hours, coil wire w/partial distributor cap in hand and adrenalin dripping out of my pores.

I then realized that I had broke my friends car for no reason. Had I only acknowledged that it was dieseling from the on set, the cap would be in one piece.

I can vouch that when it happens to you for the first time, you can be caught off guard.

The fact that it occurred with me behind the wheel instead of my friend's wife may actually be a sort of blessing.

Back in the day it happened to a friend on an AT2MX 125. We had just fixed the transmission and it needed a new throttle cable. He could not wait for the replacement cable, so he took it out for a trail ride holding the cable inner with one hand and steering/working the clutch with the other. Just asking for trouble! The throttle stuck wide open somehow in first gear. Winding the p_ss out of the engine in first, he slammed it into second gear. It ripped the chain apart in the middle. I would not have believed it if I didn't see the chain myself. I am surprised it didn't break the transmission too. Somewhere in all this, he tried the kill button, which didn't work. When the bike came to a stop with the engine screaming away, he pulled off the plug cap. The engine continued at full tilt. Not knowing what to do, he flipped on the choke. That, he said, stopped the engine.

Insane how strong the rotating assembly really is!

Here’s my puller and installer kit

I highly recommend the pvc set up because it provides a nice flat surface to distribute the really solid hammer blows it took to drive seals home.

Right...this thread was originally about seals!

I'm more worried about getting the seals out than in, I have a lathe I can make the install tool with, looks like you started out with a pvc hub bushing? What did you use to pull on the screws with, just some pliers? I could see it working pretty good by making a plate with 3 holes in it, a threaded hole in the middle and two holes for the screws to go through but small enough that the heads won't go through then a bolt in the middle to pull with. Thanks for the ideas on how to wrassle them in and out

drilled 1/8" holes thru seals, taking care to stop when through
my situation had the seals coming out really easy, installation wasn't difficult, just took way more persuasion