![\"P0301](\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2018\/11\/2009-toyota-avalon-po301.png\")
<\/p>\n","protected":false},"excerpt":{"rendered":"This past Monday on my way to work, my car started bucking and the check engine light started flashing. I checked the code, it was P0301, Cylinder 1 misfire. Since then I have…<\/p>\n
First I Changed the Ignition Coil Cylinder 1
\nThen I Changed the Spark Plug Cylinder 1
\nChanged the Fuel Injector Cylinder 1
\nPerformed a Compression test Cylinder 1. Passed 185 psi
\nVisually inspected the wire harness
\nVisually inspected the vacuum hoses
\nSwapped the ECU<\/p>\n
About 2 months, ago I installed a new fuel pump, fuel filter and pressure regulator.<\/p>\n
When I first start the car, it runs fine. While it is still in park, I can rev ’til the cows come home without issue. When I put the car in gear and drive for a few seconds, I get the Flashing CEL and Misfire code(p0301 only) comes back every time. Also, I can feel the car missing, so I know its not an erroneous code. What should I try next?<\/p>\n
I would recommend checking for intake manifold gasket leaks. It is a common failure that may cause a misfire problem. I have provided a diagnostic chart to help assist you.<\/p>\n
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