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Nairaland Forum / Nairaland / General / Car Talk / Misfire Codes On Lexus RX350? (3257 Views)
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Misfire Codes On Lexus RX350? by Whynow(m): 5:43pm On Jul 23, 2017 |
I have been experiencing something strange on my 07 Lexus Rx350. From CEL caused by misfires codes jumping from 1 cylinder to 3 to 5 to 6 e.t.c. I have changed up to 4 coils in space of 1 month This morning cylinder 6 misfire popped up...... Not again I said. Now I no longer believe its my coils acting up, but something else triggers the misfires Other observations Shakes whenever I start it in morning and smoothens Whenever i rev the car ver high, its shakes /shudders and shuts off. Trying to start it, it delays and cranks like i have a bad battery, which is not. Then I perceive a carbon like smell. I have installed new sets of NGK bought from amazon. So not plugs. My mechanic says probably a bad injector or a fuel supply issue Please I need advise |
Re: Misfire Codes On Lexus RX350? by mayor2013: 6:25pm On Jul 23, 2017 |
Whynow: A lot of things can be responsible for misfire. What other fault error do You have outside of a misfire. Could you expansive further on this carbon like smell. why do you keep changing are the older coils burning out Things to check Clogged up fuel injectors Low pressure fuel pump Can be checked using a fuel pump pressure tester Dirty airfiter Clogged up throttle body Worn out spark plugs And many more For you to clean up your fuel injectors. Make use of an fuel injector machine with ultrasonic bath 1 Like |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 6:30pm On Jul 23, 2017 |
Thanks bro Please see as at July 5th.. Have changed the 3 and 4 coils. Last week 1 and 2 came up ...changed. Today 6 came up. This was where i gave up. The carbon smell is when I rev the engine and the car shut off...... The O2 sensors code has been there long before, so its not the problem.
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Re: Misfire Codes On Lexus RX350? by mayor2013: 6:33pm On Jul 23, 2017 |
You have a random cylinder misfire. Check 02 sensor and replace. That is responsible for your black smoke being emitted from the exhaust. Did you use the recommended spark plugs |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 6:54pm On Jul 23, 2017 |
mayor2013:There is no black smoke sir my engine steams beautifully from exhaust. The O2 sensor is downstream, and is heated type which really should not be a problem. I stand to be corrected. Yes I used the recommended plugs The O2 code is pending because I cleared the codes, it will come out as current .. |
Re: Misfire Codes On Lexus RX350? by GAZZUZZ(m): 7:32pm On Jul 23, 2017 |
what we're the codes that prompted you to replace the coils? |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 7:50pm On Jul 23, 2017 |
GAZZUZZ:P0303,P0304, e.t c |
Re: Misfire Codes On Lexus RX350? by awiriwa: 7:53pm On Jul 23, 2017 |
Bros, just check your catalyst (along the exhaust line). Looks like it's blocked. Also, feel the gear section inside the car when moving, if it feels hot...bingo, the catalyst is blocked. That's what is most likely killing off your coils. 2 Likes |
Re: Misfire Codes On Lexus RX350? by GAZZUZZ(m): 8:06pm On Jul 23, 2017 |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 8:07pm On Jul 23, 2017 |
awiriwa:That particular catalytic converter has been replaced. The old one was black with the ceramic cracked inside. It was also checked last week, and the netting was perfect, no sign of blockage. |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 8:09pm On Jul 23, 2017 |
GAZZUZZ:How humorous...I asked for advise . BTW, I am not buying them on my own, a mechanic did after checking the coils |
Re: Misfire Codes On Lexus RX350? by honmusa(m): 8:13pm On Jul 23, 2017 |
Whynow:check the fuel pressure and intake leak detection test. stop throwing parts at problem ,go for diagnosis that will accurately pinpoint cause of the misfire |
Re: Misfire Codes On Lexus RX350? by mayor2013: 8:44pm On Jul 23, 2017 |
Lastly get a professional to handle this problem. Why not use money used in buying coils to Pay a professional to get the job done properly |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 8:49pm On Jul 23, 2017 |
mayor2013:Okay thanks.... Pls do you know any reliable Lexus tech around Gbagada area ? |
Re: Misfire Codes On Lexus RX350? by mayor2013: 8:52pm On Jul 23, 2017 |
Whynow: Kidnap this man here https://www.nairaland.com/honmusa |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 9:15pm On Jul 23, 2017 |
mayor2013:Tx a lot |
Re: Misfire Codes On Lexus RX350? by Bizzyliss(m): 9:47pm On Jul 23, 2017 |
awiriwa:I suggest this too |
Re: Misfire Codes On Lexus RX350? by timifakay(m): 10:34pm On Jul 23, 2017 |
Whynow: All O2 sensors have a heater circuit because the exhaust gas temperature is not high enough for the sensor to read so it needs extra heating up. |
Re: Misfire Codes On Lexus RX350? by boldx(m): 7:37am On Jul 24, 2017 |
other observations 1. Did you buy bad fuel somewhere? Seems your fuel line has dirt/water. 2. Clogged up fuel injectors*** Please run a live data scan on your car and also check the 02 sensor voltages, STFT and LTFT? Take the screenshots and post here. Please be more open minded. We are only here to help. My car engine is V6 Toyota so I am running through issues I have had on my mind. |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 12:28pm On Jul 26, 2017 |
boldx: Will do. Tx |
Re: Misfire Codes On Lexus RX350? by sooperrescue(m): 11:45am On Jul 27, 2017 |
Unleaded Regular doing its stuff. Don't bother changing anything, just look for good octane booster and you will be free from this wahala. Try Shoprite |
Re: Misfire Codes On Lexus RX350? by sholarb(m): 10:36pm On Jul 27, 2017 |
sooperrescue: Hi Sooperrescue, how often do you recommend the use of octane booster? |
Re: Misfire Codes On Lexus RX350? by sooperrescue(m): 11:02pm On Jul 27, 2017 |
Everytime you buy fuel, add 2 bottles and after the third fill up, use a bottle continuously at every fill up . The car will balance up and be on the move again. The difference between a toyota and Lexus is the fuel. |
Re: Misfire Codes On Lexus RX350? by Whynow(m): 11:51am On Aug 10, 2017 |
Fixed! Clogged fuel filter, and pump had low pressure. So bought a complete one N30,000 from my dealer at Ladipo. To add to that , I also cleaned my MAF with this which I bough of Konga On Konga , search for Liqui Moly Air Flow Sensor Cleaner - 200ml Hope this helps someone. |
Re: Misfire Codes On Lexus RX350? by ugreat(m): 1:50pm On Aug 10, 2017 |
Whynow:Thanks for coming back to update us so we can learn? |
Re: Misfire Codes On Lexus RX350? by boldx(m): 3:53pm On Aug 10, 2017 |
boldx: Thanks for the update. Well done. |
Re: Misfire Codes On Lexus RX350? by Famocious(m): 12:18am On Aug 21, 2019 |
Nice piece |
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