I have a 1999 RX300 with 140K miles, its never let me down until yesterday, I went to drive it and it ran ruff, I am getting codes P0300, P0302, P0303, P1305 and P1025, After reading threads on this site I replaced the OCV and all the plugs, the gaps are correct to. I am a little worried if I buy coil packs it might not fix my problem and I cant really afford to keep replacing parts that will not fix the problem, if anyone has some insight please let me know

Joe

 

also i just disconnected the battery, switched coil packs from 2 to 6, re connected the battery, drove it around and pulled the codes and I am still getting misfire on bank 2 and 3, I am really confused any help would be greatly appreciated

 

Now I am confused .. bank3?

Spark plug order
Cabin
1 3 5 <= Bank 1
2 4 6 <= Bank 2
Front

Salim

 

ok maybe i said that wrong, i am getting the exact codes as i did before i swapped coil packs.

 

i think i may have figured it out, I took coil pack #2 out of the cylinder plugged it back in turned the car over, no spark, checked #3 and I got a spark, I then swapped coil packs from cylinder 2 to 3 and still no spark, so I think I found a bad coil pack. I am going to get a new one tomorrow, any ideas if I should one from auto-zone or the dealer?

 

Spark plugs, coil-packs and all sensors should be OEM. <= period

Salim

 

Like salimshah said, OEM! Don't skimp on essential parts.

 

Here's a 3rd to that!

 

ok, when I changed the plugs I installed AC Delco, I will order a stock coil pack and new stock plugs when the money hit the bank, thank you

 

Changed the coil pack, everything is working great, thanks for you help