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Feels like there's a misfire, but no codes.

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kc4wvl
Regular Member
Posts: 11
Joined: Wed May 30, 2007 11:43 am
Location: NE Illinois

Feels like there's a misfire, but no codes.

Post by kc4wvl » Thu Aug 08, 2019 3:27 pm

My best seems to have an issue that has me puzzled.

At the beginning of March, my wife and I were heading out on a roadtrip. We had only gone about 25 miles when I heard a pop and the vehicle started having problems. Considering the weather (COLD!!) it ultimately required replacing the alternator, with another long story.

Needless to say, that issue was finally resolved after 2 months. Now, there's a new issue. From time to time, the engine feels like there's a misfire. It's not all the time and no codes are stored in the computer.

This only began after the alternator had been replaced. Prior to the previous alternator went south, this condition did not exist. Even after 158,500 miles and 12 years, this car had been the most reliable car I'd ever owned.

Has anyone else experienced the same symptoms and if so, what was the diagnosis and resolution? Thanks.
KC4WVL
07' SEL Dark Blue Pearl / Light Gunmetal / Pebble Cloth / FWD

K4uwc
Regular Member
Posts: 37
Joined: Tue Oct 02, 2018 10:19 pm

Re: Feels like there's a misfire, but no codes.

Post by K4uwc » Thu Aug 08, 2019 4:04 pm

I had a very similar situation when I replaced the original plugs with NGK. I happened to have them and they were the correct part number so I tried them. Very slight hesitation and missing that was overlooked by the computer. I installed Motorcraft and it went away.

So it could be a hiccup in your ignition circuit causing this. Mine started when I changed the plugs so it was obvious as to the source of the problem.

73's,

Marshall W4UWC

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