Flashing cel. Misfire?

[sakman84]

Have you had a fuel change since the problem began occurring.

I'd fill your tank with a high quality premium gas highest octane rating in your area. Hopefully to bring the overall octane number up in your tank if you got a previously bad batch of gasoline.

Is there any consistency to when the problem begins? Example about 10 mins after starting? fully warmed up? light driving or hard acceleration? immediately at start up?

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[S550VIN54]

I totally agree! I have had luck using BK44 fuel cleaner in the past. Nothing else this may take a shotgun approach considering the variables involved.

On a separate note, I was able to remedy a fuel gauge that was reading empty after filling up on a 2012 CTS Cadillac. I almost mistaken it for a bad sending unit on the fuel pump.

Good luck and keep us posted!

 

[VooDeeZy]

If the misfire is an actual cylinder - it will be a P0301-P0308, not just a "P0300" (random misfire). The "random" misfires are more difficult to diagnose, only because there's a variety of reasons why it will happen.

You could swap coil to coil to try to find it, but without a code scanner for actual DTC and starting point - meaning a specific cylinder misfire code - it's anyones guess at this stage.

This thread may give you some enlightenment to Ford's misfire strategies:
https://www.mustang6g.com/forums/threads/good-tech-article-on-ford’s-misfire-strategy.108076/

Also here is a pdf snip from the Ford Shop manual. which is "Coyote" specific. I'm including it because it gives a bigger picture of how to diagnose misfire events from the generic to the actual cylinder event codes:.
https://www.mustang6g.com/forums/attachments/hd-misfire-detection-pdf.538665/

You could have a faulty crank sensor OR one with loose wire contacts in the actual connector, which will also cause sporadic "random misfire" events. Other M6G members have found that the P0300 was related to a faulty crank sensor. This could be your issue too, so review each thread carefully because each owner came across it in a different manner.

Check this thread:
https://www.mustang6g.com/forums/threads/misfire-at-high-rpm.174380/#post-3531453

AND this one:
https://www.mustang6g.com/forums/th...e-sensor-tone-ring.156234/page-2#post-3197692

Thanks for all this info I really appreciate it.

 

[VooDeeZy]

Have you had a fuel change since the problem began occurring.

I'd fill your tank with a high quality premium gas highest octane rating in your area. Hopefully to bring the overall octane number up in your tank if you got a previously bad batch of gasoline.

Is there any consistency to when the problem begins? Example about 10 mins after starting? fully warmed up? light driving or hard acceleration? immediately at start up?

Yes different fuel since the problem started. I only 93 and from either an exxon or shell station

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