GLIDESUL

I went in for my routine oil change at toyota dealer i brought my car from. Soon as i leave my check engine vsc light comes on. So i go back they run test an code p0305 comes up with misfire in cylinder 5. He reset it an said if it pops up again come back. i do notice shes not as smooth as she could be. My question is if its related to spark plugs and wires or something deeper. And if so is it difficult to do this tune up work (plugs,wires). Another thing he told me my car does not have plugs it has coils is this true. because when i look online for plugs and wires for 2002 ls 430 they pop up. Thanks in advance.

Lust4Lexus

My firend recently had his VSC light come on, on his RX350 and it turned out to be a loose gas cap. Yes you read correctly- his VSC light came on due to a loose gas cap, as many computer systems are intertwined.

The car indeed does use coilpacks. Coil packs can cause misfiring and cause some roughness in the engine.

GLIDESUL

Thanks does anyone know which is cylinder number 5

GLIDESUL

Just changed all plugs and what I thought was #5 ignition coil, still got check engine vsc. Need to find which is #5.dam them coils are expensive, was tryin to go the cheap route and replace only the bad one . May just have to get all 8 coils . Some body with manual need help!

RomanTPA

do what i did with my old car.. move the coils around and see which one will start to miss fire. and if its still #5 its not the coil

GLIDESUL

Thanks RomanTPA but I just got off phone with lexus dealer they gave me the cylinder order. Driver side is odd 1,3,5,7. Passenger side is even 2,4,6,8. I had it reveresed. Ill give it another try as soon as it stops this much needed rain outside. Almost everybody grass is brown and burnt around here.

GLIDESUL

I must be bored but its funny when I replaced my plugs I had 6 ngk and 2 denso plugs at 130,xxx all were iridium .