Problem started a few days ago and happened out of nowhere, started missing real hard and had no power.
About a year ago we had a similar problem but it would barely idle, we replaced the coil and the distributor and it fixed the problem. It will idle but the engine is shaking pretty bad, you can also rev it all the way up but it will miss the whole time, we pulled all the plugs and number one is crusty white like its not getting any fuel, another one was cracked on the porcelain but all the other plugs look fine.
So we replaced the cracked spark plug but no difference. We then pulled the spider injection apart and popped the number one injector then we cranked it, a bunch of fuel shot out so we are stumped at this point.. were about to check timing but i want to know what yall think, any help is appreciated.
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I can only give general advice such as doing a thorough diagnosis so you avoid throwing parts at it.

I agree that the white plugs do suggest an overly lean mixture to those cylinders.

Have you obtained any OBD codes?

Perhaps a new injector assembly is needed?

 

We need to see what codes you have and the misfire count by cylinder.

George