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Misfire in Cylinder 1, 3 and 5 how do I fix it?

I have a multiple misfire in bank engine 1, 3 and 5. When I drive my Lexus RX 300 it idles really bad and the car shakes and putts as if its going to cut off. I just recently had a tune up and I replaced coils 2, 4 and 6. I was told by the mechanic that has it it's not the coils or spark plugs. However I do have a Manifold leak could this have a lot to do with my problem and can someone please help me on how to fix it because the mechanic doesn't even know at this point he has ran every test at this point and we can't ddetermine what's causing this issue. Please help.

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If there is a vacuum leak from the intake gasket. It is possible it will kill those cylinders. Take some wd40 and spray around the intake gasket on that side. If the engine runs better it's problem the intake gasket at fault. Try getting to the bolts and tighten all bolts see if that helps. If not spray around larger vacuum hoses and check for a leak and repair as nessary..

Posted on Apr 21, 2017


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Posted on Jan 02, 2017

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SOURCE: cylinder 3 misfire

Make sure you're using the recommended spark plugs. When my car did that, I had put Bosch Platinum Plus-4 plugs in and got that same problem. Turns out the plugs are too hot and cause it to fire prematurely and kick the misfire code.

Posted on Jul 24, 2008

  • 1 Answer

SOURCE: Need help with Audi A4 2000 1.8t Misfiring and Fuel/Air Problems?

replace the speed idle sensor

Posted on Feb 28, 2009

  • 78 Answers

SOURCE: 96 lexus es 300 blinking check engine light

Hi there;

#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps

Posted on Mar 17, 2009

  • 1 Answer

SOURCE: Car Shakes When Driving

I had the shaking problem too, had the #5 coil replaced and the shaking instantly stopped.

Posted on Apr 22, 2009

  • 1 Answer

SOURCE: Toyota Corolla 98 Cylinder #1 and #4 misfire

I have power at the coils , have good compression , have you ever seen a crank pickup cause this problem?

Posted on May 09, 2009

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