1999 Lexus RX300 Q&A
1999 Lexus RX300 Question: random misfire
Best to check the basics, i.e do a compression test on the effected cylinders, then if the plugs are old, replace them with factory spec plugs. Also check to see if the coils for each cylinder are contaminated with oil from a leaking valve cover gasket. If so replace the coils as well. These are some of the first steps that I would take to deal with these misfire codes. - dandd
I ck it have following cods p1130 air/fuel sensor ,circuit bank 1 sensor 1 MOD 10 , P0300 random mis Fire dectected pending, P0303 cylinder 3misfir decked landing MOD 10 ,P0305 cylinder5 mis ...