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First of all I didn't call you dumb! I said it ACTS like it has a rev limiter on it...I didn't say it had one on it. The fact that it shuts down so abruptly at pretty much the same rpm and the O2's go to virtually 0 yet the injector duty cycle stays acts like the ignition is being shut down...

Your taking it out of context !! Read the whole thing. Let me dumb it down for you. I said it appears the fuel is being shut down but the injector duty cycle does not confirm that so I said it might be an ignition issue. Then in a later post I said check to make sure the damper isn't moving out...

I didn't say the fuel was being shut off. I said it looked more like the spark was being shut down.

The problem seems to be rather abrupt at the 5800-5900 rpm like the ignition is being shut down. I also noticed the data also shows you are always in 4th gear like the transmission electrical connector is disconnected. I would also check the end play in the crankshaft to make sure the damper...

What chip are you running? It almost looks like it has a rev limiter on it. It looks like the fuel is being shut off at around 5900 rpm even though the injector duty cycle is still up so maybe spark is being shut down?

You guys are overthinking this. He should be checking the run-out after the converter is bolted up to the flexplate. If the run-out is excessive then figure out where the problem is. Like Chuck mentioned....the nose of the converter is most likely sagging in the pilot on the crank. The pilot...

Yes it is. All flex plates and converters are not perfectly flat. There are tolerances in all mechanical devices. You may be overthinking this. I would bolt it up and start the engine and see if there is any wobble in it. Make sure you have the converter pushed all the way up to the flex plate...

That's why it's called a flex plate.

With the engine running does the converter wobble? If not then you don't have a problem. It could be just the way you are taking your measurements.

Sounds like a lean condition. Could be a fueling issue like low fuel pressure or a bad MAF.

It's stock

Compression seems a little low for a rebuilt motor?

18mm is the size of the nut not the head of the bolt.

I know I posted I cut the ends off of a 19mm box wrench (just repeating the OP's original post) The actual size was 20mm

The problem is the serrated area under the head of the bolt and in the frame which normally keeps the bolt from spinning gets damaged for some reason and the bolt spins in the frame. There's not much room with the engine in the car to get at things. I have had a couple of cars come in like that...

I cut the end off of a 19mm box wrench short enough to fit inside the frame on the head of the bolt. Worked great.

Looks like it still does

Looks like a 9/11. Not sure who made it.

Yes