KraZ

I just bought my first Z - a 1980 28 zx. It ran great until I washed it. Now it won't rev past 2250 rpm. It bogs and won't do anything until it goes down to about 1500. Anything under 2250 it runs great. What can I check? It has new plugs/wires, new fuel filter. How do I check fuel pump? or does this sound like ignition? How do I check the coil? Thanks for any help:ermm:

Hey, everyone, I just got my first Z - a 1980 280zx. I'm very happy, even though it needs a lot of work. It ran great when I drove it home 2 days ago, and it seemed cold natured, but after it warmed up it was very smooth. Now, all of a sudden, it won't rev past 2250 rpm. When it hits 2250, it bogs down until the revs drop to about 1500, then back to normal. It does this in every gear, under load or not. I'm super frustrated and just looking for some input. I changed the fuel filter, revved it w/o an air cleaner, nothing helps. Any ideas? Thanks!