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There should be an EPA sticker somewhere in the engine compartment, which will show vacuum line routing, firing order, and spark plug gap. If that sticker is missing, you may need to contact a Lexus dealership, give them your VIN number, and have them provide the information for you.
replace spark plugs, spark plug wires, cap, ignition rotor, air filter, oil change, transmission flush, transmission filter&gasket .. That should do it.. It'lI be good if you could check your timing as well.. do this tune up every 15-20 thousand miles and oil changed every 3000 miles, depend on how much you drive it.
ok, i tell you 3 possible causes.
check maf sensor connection , check fuel pressure regulator (max press fuel in rail 40 psi) , check engine compression (min 95 psi ) if less this cause spark plugs wet and not start
Spark plug Firing order.
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