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john -aka eauto
john -aka eauto, The Car Guy
Category: Lexus
Satisfied Customers: 20606
Experience:  15 years as a auto tech Ase Certified
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Check engine light is on. Auto parts store said engine coil

Customer Question

Check engine light is on. Auto parts store said engine coil circuit error resulting in miss fire on all cylinders
JA: Does the light stay on, or does it blink?
Customer: Stays on, but blinks when it miss fires. Only miss fires at about 3000 rpm or above
JA: What is the model/year of your Lexus?
Customer: Rx(###) ###-####JA: Are you fixing your RX 300 yourself? What have you tried so far?
Customer: Removing each coil one at a time it starts to miss fire while idling. Then invert the coil again to see if it continues to miss fire.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 1 month ago.
Category: Lexus
john -aka eauto
Expert:  john -aka eauto replied 1 month ago.

Hello and thank you for your question.
My name is John (aka Eauto) and I look forward to helping you with your rx
Sorry to hear you are having problems today.
Please keep in mind that I DO NOT know your skill level.
The Web Site will prompt a phone call feel free to Just ignore those , I will let you know if it's needed.......... I will do my best to answer your question fast and accurate using the info you have provided. Let's get started.

have you changed coils yet?

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Expert:  john -aka eauto replied 1 month ago.

Hello and thank you for your question.
My name is John (aka Eauto) and I look forward to helping you with your rx
Sorry to hear you are having problems today.
Please keep in mind that I DO NOT know your skill level.
The Web Site will prompt a phone call feel free to Just ignore those , I will let you know if it's needed.......... I will do my best to answer your question fast and accurate using the info you have provided. Let's get started.

have you changed coils yet?

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Expert:  john -aka eauto replied 1 month ago.

Thank you again for Choosing Just Answer, I am sorry you were unable to provide me with additional information, but based on the limited information I have on your question page I can provide the following Answer.

diagnostic codes would be helpful so i can narrow it down But usually coil replacement is the fix

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Customer: replied 1 month ago.
All of the coils?
Expert:  john -aka eauto replied 1 month ago.

thats a good idea but if you tell me the code i can try and narrow it down

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Customer: replied 1 month ago.
I can get the exact codes tomorrow. We were told it had a code indicating coil circuit error, then a miss fire on ALL cylinders. We thought maybe 1 circuit was bad & it resulted in a chain reaction from the others. If we could narrow down which coil was bad, we could replace it & solve the problem. Do you think all are bad?
Customer: replied 1 month ago.
Okay, I’ll get the codes tomorrow & let you know
Expert:  john -aka eauto replied 1 month ago.

I doubt they are all bad but it usually turns into the domino effect you end up replacing them all sooner or later

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Customer: replied 1 month ago.
Can I send the code tomorrow or do I have to start a whole new session?
Expert:  john -aka eauto replied 1 month ago.

you can But i work all day so I wont be able to respond back till evening

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Customer: replied 1 month ago.
That’s fine - I work all day too. I’ll send the codes tomorrow. Thanks for your patience
Expert:  john -aka eauto replied 1 month ago.

no problem talk to ya tomorrow

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Expert:  john -aka eauto replied 1 month ago.

any luck

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Customer: replied 1 month ago.
No, their machine is broken. Getting a new one tomorrow. I'll go back in the morning
Expert:  john -aka eauto replied 1 month ago.

cool

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