High idle after changing valve cover gasket

[98taco]

What's up fellas. Newbie here. Been around trucks alot but mostly 22r/re. Just got a 98 taco with a leaking valve cover gasket and torn up plug seals. Replaced it all and now has a high idle. Mid 1000 rpms. Noticed oil on floor after drove around the block and parked. Motors still hot so I won't be touching till I have free time which is hard to find.. any info or advice. Thanks.

 

[OR17TRD]

Check vacuum lines make sure you’ve got everything in the right spots.

Throttle body sticking? Clean it?

Bad thermostat? I’ve seen a bad thermostat cause this the engine thinks it’s still cold and idles high.

 

[warmfuzzies]

Second on vacuum leak — correct vacuum keeps the oil in the engine.

Just turn it on and listen/run your hand over the lines to find the loose connection or bad hose.