I too have an 88 Century.
I'm amazed you did all that stuff to it, and it didn't correct the problem.
I have found that the air intake manifold where the flapper in the top beneath fuel injector (throttle body engine), gets swelled, and doesn't allow for air to pass through all that easily. Therefore I've had to stick a pen-sized metal rod in between the throttle body and the flapper. (Move the throttle turning thing on the side with the wires, and stick the pen in there to get it started. I DID use a pen for a while, but then it melted away.
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Friday, January 23rd, 2009 AT 10:41 PM