Random misfire P0300

[al3x]

Hi, I searched through the forum and saw a few people had a similar problem, but I didn't find a definitive answer to what can cause the problem besides checking spark plugs. I have a whipple stage 1, had a cel turned on months ago for random misfire, had cel blinking recently again for same problem but didn't stay on, I figured if I had bad spark plugs it would misfire more frequently than only twice in over 10,000 miles lol. Main question would be if this is a major cause for concern? considering how infrequent it happens and how I am unable to replicate it.

Sponsored

 

[keltymd]

yes it is cause for concern. I would pull the plugs and look real close at the ceramic. you may have one or more cracked that is causing the issues.

 

[zuki_dan]

Have you done the crank relearn procedure since the install? It is in Whipple's install instructions after flashing their tune. Not doing will also cause the random mis-fire and blinking check engine light.

 

[al3x]

I will definitely check the plugs, and I have done the crank relearn after installing the tune. but I can do that again this weekend. Thanks for the advice, didn't think it was a big deal the first time but since it happened again I figured I'd investigate about it

 

[keltymd]

I will definitely check the plugs, and I have done the crank relearn after installing the tune. but I can do that again this weekend. Thanks for the advice, didn't think it was a big deal the first time but since it happened again I figured I'd investigate about it

I am a bit OCD but......... To make sure I do not get out of line or mess up the plugs I took a 6" extension and wrapped duct tape about 3" up to build it up to be a little smaller than the plug port in the valve cover. That way I cant slip with the extension and accidentally crack the porcelain when tightening or loosening

 

[Bahndvr]

Did you resolve the issue?

 

[Chummel]

what fuel are you running? When i was using an octane booster i was fouling plugs bad, had a few misfires. switched to e85 and have zero issues with plugs.

Sponsored