Over the winter, I replaced the exhaust manifold and head gasket on my 86, it only has 86k, but the manifold gasket was leaking. I also replaced other parts, including the throttle position sensor. The engine will not start without the throttle being opened now, and is running very rich.
I have removed and adjusted the TPS 3 times and am in the process of tracing down all vacuum hose connections to insure they are correct. I did a compression test, OK. I think I have the TPS adjusted correctly, per the factory manual. My next step will be to remove the upper intake again, and change out the fuel pressure reg. I would appreciate any comments or suggestions. Thanks!!