P0305?

Nick - Oddly enough the “Check Engine” has now turned off again on its own. 3 different mechanics have told me “Cylinder 5 misfires.” That’s the only code I know of that has gone on other than the occasional on/off of “Check Engine.” Perhaps im using the wrong terminology but the first mechanic told me he “switched” something I thought a cylinder to see if the cylinder was bad or the location was bad. After the change my “Check Engine” did not return for a year or so but the next mechanic said “Cyl 5 Misfire” again. Ive never noticed the gas issue before until this one time. So is my gas leaking out? Or is the car reading the quantity wrong? The next day the gas gage went back up then hours later way down. Bottom line, if I change the Vanos, will this fix that misfire which would allow me to pass smog? Smog place says Cyl 5 is the hold upThe car has over 200k, am I wasting my time trying to fix it?

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[Nick at Pelican Parts]

Changing the VANOS will not help because it affects all cylinders the same. The mechanic probably swapped coil positions and the problem stayed the same so it's not the coil. Possible injector and /or check compression. Maybe squirt some oil in that cylinder and see if that helps

- Nick