Pull the vacuum line at the FPR and check for raw fuel. Wouldn't hurt to check fuel pressure just to be sure it is in spec at all times.
Go over as many vacuum lines/connections as you can, like it was court ordered. Check the valve cover bolts to see if any are loose. Make sure the cross-over tube from the air intake tube to the driver side valve cover is in place.
Check the oil for any evidence of coolant, and/or fuel smell.
Air up the tires and try to check if any calipers/wheel bearings are dragging. Check the fuel filter for evidence of leaks.
See if the place you normally buy fuel has been selling a winter grade. Buy fuel from another station next time you fill up. Toss in a small bottle of fuel dryer at the same time.
Replace the PCV and it's grommet. I'll assume you've replaced the air filter. Inspect the throttle body plate and bore for carbon/oil buildup, and the plate pivot shaft and bearings for excessive play...you're looking for unmetered air leaks where the shaft moves in the throttle body. Might need to find a smoke machine to check for other leak sources, such as injector o-rings. IC tube joints, cracked dipstick tube....
Check the crank pulley to see if it is loose or wobbles, or looks like it is coming apart at the rubber bond. Might need to do a base timing check to see if the balancer has shifted.
Still no joy, you might want to do a compression test. I'll dig out the factory 'engine/emissions diagnosis' manual later to see if I missed anything.