Put the 1 back in, and run the engine up to temperature and try again while the engine is hot. Hopefully the heads expand from the heat and loosen up the plugs.

Use antiseize on the new plugs before you put them back in.


88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride