Ahh, nothing like a good old misfire to start off a thread.
Little backstory to this one.
A year ago, cylinder 2 popped up a misfire code, stand alone, nothing else. I yanked the plug, it was fouled, replaced it, and went on my merry way.
A few months later, cylinder 3 threw a code. Yanked it, replaced it, and went on my way.
About 6 weeks ago, on my way in to work, I got the frightening flashing SES for about 5 seconds, then solid. Guess what, cylinder 3 misfire. But this one seemed different.
Scenario that threw the code: Driving at about 55mph, starting up a small incline, slightly accellerating, and WHAM, she starts to run like crap, SES flashes, then she smooths out. Sounds like she is starving for gas, and when it starts bucking, i can really smell what seems like exhaust fumes in the cab.
Been planning it for a while, so this weekend, I "tossed in" the upgraded fuel injector setup. Cleaned everything up, let her warm up for a bit, then went out for a drive. She is running great!, smooth idle, solid accelleration, woohoo!
...then I hit the first incline at 55mph and begin to accellerate... Back to square one. SES flashed, then solid, P0303 Cylinder 3 misfire.
New plugs (AC Delco Plats), new fuel filter, new PCV. SES light turns off within 5 seconds after starting her up. Now Im getting excited. She is running great!, smooth idle, solid accelleration, woohoo!
...then I hit the first incline at 55mph and begin to accellerate... Back to square one. SES flashed, then solid, P0303 Cylinder 3 misfire.
So here is my dilemma....
Only Cylinder 3 misfire is stored in the computer.
Only when Im accellerating - from at or above 55mph - on an incline
If those three scenarios are not all present, there is no issue.
Hopefully either my shop mechaninc can figure it out today, or someone has had the same scenario and can lead me to the repair that doesnt involve crate engine in the parts list.
Off to the shop...
Little backstory to this one.
A year ago, cylinder 2 popped up a misfire code, stand alone, nothing else. I yanked the plug, it was fouled, replaced it, and went on my merry way.
A few months later, cylinder 3 threw a code. Yanked it, replaced it, and went on my way.
About 6 weeks ago, on my way in to work, I got the frightening flashing SES for about 5 seconds, then solid. Guess what, cylinder 3 misfire. But this one seemed different.
Scenario that threw the code: Driving at about 55mph, starting up a small incline, slightly accellerating, and WHAM, she starts to run like crap, SES flashes, then she smooths out. Sounds like she is starving for gas, and when it starts bucking, i can really smell what seems like exhaust fumes in the cab.
Been planning it for a while, so this weekend, I "tossed in" the upgraded fuel injector setup. Cleaned everything up, let her warm up for a bit, then went out for a drive. She is running great!, smooth idle, solid accelleration, woohoo!
...then I hit the first incline at 55mph and begin to accellerate... Back to square one. SES flashed, then solid, P0303 Cylinder 3 misfire.
New plugs (AC Delco Plats), new fuel filter, new PCV. SES light turns off within 5 seconds after starting her up. Now Im getting excited. She is running great!, smooth idle, solid accelleration, woohoo!
...then I hit the first incline at 55mph and begin to accellerate... Back to square one. SES flashed, then solid, P0303 Cylinder 3 misfire.
So here is my dilemma....
Only Cylinder 3 misfire is stored in the computer.
Only when Im accellerating - from at or above 55mph - on an incline
If those three scenarios are not all present, there is no issue.
Hopefully either my shop mechaninc can figure it out today, or someone has had the same scenario and can lead me to the repair that doesnt involve crate engine in the parts list.
Off to the shop...
