What is your question?
·
·
What is your question?
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... Changed the Ignition Coil Cylinder 1 Changed the Spark Plug Cylinder 1 Changed the Fuel Injector Cylinder 1 Performed a Compression test Cylinder 1. Passed 185 psi Visually inspected the wire harness Visually inspected the vacuum hoses Swapped the ECU About 2 months, ago I installed a new fuel pump, fuel filter and pressure regulator. 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?
What makes this problem better or worse?
Better when the car first starts
How long has your 2009 Toyota Avalon had this problem?
5 days
1 Reply
Misfire must be present at idle during time of testing - testing for proper ignition spark and fuel injector pulse should reveal culprit .. Engine running compression test may be helpful. Otherwise seek *hands-on* help from 'qualified personnel' - with the necessary testing equipment. Professional quality scanner can be used *during test drive* to view live misfire data - fuel trims and various related operations data.