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2007 Lexus rx350 3.5L —misfires codes on all cylinders —also…

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2007 Lexus rx350 3.5L —misfires...
2007 Lexus rx350 3.5L
—misfires codes on all cylinders
—also has a P0354 ignition coil “D” code
—under stressful driving (up hill or highway speed) loss of some powerCommon cause for this?
Submitted: 6 months ago.Category: Lexus
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Answered in 20 minutes by:
1/8/2018
Lexus Mechanic: David Craig, Auto Mechanic replied 6 months ago
David Craig
David Craig, Auto Mechanic
Category: Lexus
Satisfied Customers: 5,756
Experience: Owner/Mechanic at 3D Automotive
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Hi my name is ***** ***** I'll be more than happy to assist you, Please allow me a few minutes to review your information. Thank you.

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Customer reply replied 6 months ago
Ok
Lexus Mechanic: David Craig, Auto Mechanic replied 6 months ago

common cause for all misfires: wrong size spark plugs

common cause for P0354: Bad #4 ignition coil.

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Lexus Mechanic: David Craig, Auto Mechanic replied 6 months ago

Have the plugs been replaced lately?

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Customer reply replied 6 months ago
1 year ago
Lexus Mechanic: David Craig, Auto Mechanic replied 6 months ago

you need to do a backpressure test then. to see if the cats are clogged

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Customer reply replied 6 months ago
With no other codes?
Lexus Mechanic: David Craig, Auto Mechanic replied 6 months ago

yes.

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Lexus Mechanic: David Craig, Auto Mechanic replied 6 months ago

clogged cats will cause misfires and misfires will eat cats for lunch

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Customer reply replied 6 months ago
Ready to rate
Lexus Mechanic: David Craig, Auto Mechanic replied 6 months ago

did you do a back pressure test ?

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