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If you have already done all of that work, the only thing left to check would be an exhaust restriction. With the engine idling, see if the flow from the exhaust is strong enough to push your hand away (thick gloves are a good idea). You shouldn't be able to hold your hand over the pipe for more than a second or so with the engine running if the exhaust is flowing correctly.
Let me know how it looks.
Does it feel like it is shifting up too quickly?
Do you have a fuel pressure gauge to check pressure from the fuel pump?
Have you checked base timing or engine vacuum?
The timing is right.
I was trying to convert kilopascals to PSI. 54kpi (7.8psi) is a little low. Not terrible though. If you pick up the idle to about 2500 rpm what does the vacuum do?
I think you have an exhaust restriction, most likely in the cat. I think the next step should be disconnecting the exhaust system at the manifold or in front of the cat and see if the acceleration improves as you drive. It's going to be noisy.
I just wanted to check whether you need any additional info.
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