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1999 RX300 misfire / coil issues on ALL CYLINDERS

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1999 RX300 misfire / coil issues on ALL CYLINDERS

 
Old 04-06-16, 05:08 PM
  #16  
PeglegGold
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Default Symtom

Originally Posted by JAB View Post
Alternator and/or battery may be dying.
Its been doing this for a year, and just gets worse.
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Old 04-06-16, 05:41 PM
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Originally Posted by carguy07 View Post
Post the codes you are getting. Are you replacing with OE/Denso parts or aftermarket?
All OEM parts, codes first were O2 sensors than engine coils. Now all engine coils.
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Old 04-07-16, 01:52 PM
  #18  
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Possibilities are endless ..
timing belt, crank position sensor, ignitor, ground (specially the one hidden between the intake and firewall).

Salim
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Old 04-08-16, 09:26 AM
  #19  
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How did you "check the oil control valve"? Mine had these same symptoms even though the valves seemed OK when I checked them. Replaced them anyway (along with the OCV filters) and problem solved.
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Old 04-08-16, 11:01 AM
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Originally Posted by cotis View Post
How did you "check the oil control valve"? Mine had these same symptoms even though the valves seemed OK when I checked them. Replaced them anyway (along with the OCV filters) and problem solved.
I will try these fixes, I will let you know if it works and thanks!
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Old 04-08-16, 06:38 PM
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Originally Posted by PeglegGold View Post
I will try these fixes, I will let you know if it works and thanks!
Did you use OEM parts or Parts store parts?
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Old 04-08-16, 07:49 PM
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Originally Posted by cotis View Post
How did you "check the oil control valve"? Mine had these same symptoms even though the valves seemed OK when I checked them. Replaced them anyway (along with the OCV filters) and problem solved.

Did you use OEM parts? Or Parts store parts?
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Old 04-11-16, 12:09 PM
  #23  
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Originally Posted by PeglegGold View Post
Did you use OEM parts? Or Parts store parts?
I used OEM parts that I got from my local Toyota dealership. They are closer to me and the cost was less than the Lexus dealership for the same thing.
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Old 07-21-17, 10:22 AM
  #24  
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so this never got resolved? i have a customer with the "all coils are misfiring" issue and the timing is all over the place. im assuming the t-belt is most likely the issue. pegleg...why highjack this thread?
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Old 02-18-19, 09:33 AM
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Originally Posted by M45owner View Post
Thanks for the replies....we dropped it off at the dealer AGAIN Monday morning. They said they would call us later that day or "tomorrow" (Tuesday) with what is wrong. Well, they called today saying they were STILL working on trying to figure out the problem. 3 days and the Lexus dealership doesn't even know what is going on!?

The transmission went out roughly 350 miles after we got the car...had it replaced AT LEXUS. Did the timing belt and water pump job at the same time. No other issues until 2 weeks ago when we got a misfire on 2 cylinders...I believe it was 1 and 3. Moved the "bad" coils to the front of the motor and changed all spark plugs with NGK Iridium plugs. I never use the Bosch or any other garbage in my cars.

Now cylinders 2 and 4 were showing the bad coils, which is where I put them. Put in new coils and it didn't throw any codes and drove like a top until Tuesday (we finished the work on a Saturday)...so 3 days it drove fine. Tuesday we started experiencing the misfire again except it was on EVERY cylinder EXCEPT cylinder 1. Drove like absolute ****.

Took it to a local shop, they didn't know...took it to Lexus, they didn't know. Told me "it has to get worse so we can find out the issue". Well, it never got better and it still misfired even more afterwards. So we just dropped it off again this past Monday morning.

Codes are P1305, P1310, P1315, P1320, P1325....all "igniter circuit malfunction" for cylinders 2-6. No other codes present.
Did you ever find out the issue? I'm going thru the exact same thing! I'm at my wit's end.
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Old 02-18-19, 05:29 PM
  #26  
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Default Cylinders Misfire on RX-300

Thanks for all of the post regarding this issue. My RX-300 2002 started showing this problem on cylinders 1, 3, and 5! I never sow it on the other cylinders. It looks like no even the dealer can determine what is causing this. I am an electrical engineer by trade and the only thing that might be causing this problem could be the spark plug cables. It is possible that with time, the integrity of the cable insulation mitght be breaking down and it is causing some of the high voltage on these cable to be leaking. I will go ahead in my case and replace the spark plug cable before changing any of the coils that do not seem to be correcting the problem. I replaced all of the spark plugs and that did not fix the problem.
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Old 02-18-19, 06:56 PM
  #27  
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Originally Posted by rapaulino View Post
Thanks for all of the post regarding this issue. My RX-300 2002 started showing this problem on cylinders 1, 3, and 5! I never sow it on the other cylinders. It looks like no even the dealer can determine what is causing this. I am an electrical engineer by trade and the only thing that might be causing this problem could be the spark plug cables. It is possible that with time, the integrity of the cable insulation mitght be breaking down and it is causing some of the high voltage on these cable to be leaking. I will go ahead in my case and replace the spark plug cable before changing any of the coils that do not seem to be correcting the problem. I replaced all of the spark plugs and that did not fix the problem.
Your car doe not have "spark plug cable", instead it uses coil over plug, which means that the coil is directly on top of the plug. Since this is occurring on cylinders 1,3 and 5 the cylinder bank 1 aka the pain in the *** to replace spark plugs. I would start off by removing the plugs and inspecting them and maybe even replacing them since they are a PITA (pain in the ***) to replace.
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