misfire

Hello guys! My 2016 Ecoboost ghost misfires and shakes a bit when RPM drops after cold start until the engine warms up after that it runs well without any issue plus It doesn't give me any trouble codes, this happened after a head-gasket replacement and engine rebuild. Listen closely to the...

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Isn't the nature of a misfire long term possible damage to your engine? I've seen in threads all over the web of people turning it off in their custom tunes. My question is, why?

So I’ve had an issue with p2004/p2005 and p0300 early on but p0300 went away on its own a week ago(?). I did an IMRC lockout on the intake manifold with a PBD tune and there’s been no check engine light since. HOWEVER. I like to look at all the diagnostic data because I’m paranoid since I got...

I was on the way home from doing a few datalogs on my new tune revisions from pdtuning when heavy smoke began to come out of my exhaust so i pulled over and left my car on and it repeated to smoke for another few minutes. On the way home all of my temps seemed fine and my oil pressure was...

What’s up y’all I have a 2020 Mustang GT 6 speed that I bought back in June, 2020 with about 35miles on the car. My first ever brand new car. At around 3-4K miles the car would start surging? I don’t even know what word I would use to describe it. RPMs normally go up steadily, but every now...

Hey, so recently I got a set of BBK Longtube 3/4th headers installed, the car was running fine and sounded great, take it out later that night on the highway, placed the car on track mode and did a slight pull when the check engine light flashed and disappeared, checked the codes on my Ngauge...

Making this post after trying all other options to diag this misfire that I am having. Car is a 15’ GT premium manual FBO E85. 18’ manifold, headers, exhaust, JLT CAI, LU47 injectors. Recently got tuned for e85. I was on a Lund 93 tune with same mods for the longest time and had no problems at...

About a month ago, I purchased a 2017 GT CPO from Dallas. About a week and a half in I was already having issues, but the worst of them all was the misfires. Codes are P0316 and P0308 which is misfire at startup and misfire on cylinder 8. The first trip to the dealer, they swapped the plugs and...

Hello everyone, first post here.Bought a 2015 Mustang GT AT premium stock with 46k back in June of this year. Absolute mint condition as i was driven by a older woman in her 60's. However im trying to track down a little misfire, or may get verification that its ok. I didnt check this data prior...

First let's get all the details of the car and what has already been tried before I even go into what is happening: I will take it to the dealer, I just like to be as informed as possible before I do, and the only dealer around here with an SVT certified tech has a 20 deep waiting list. 2017...

Hopefully this will save time and a headache for those of you that get this problem. I started experiencing a lower RPM misfire which was most prominent off of idle to 3k rpm. I would get an intermittent CEL which would produce a P0300 or P0308 code (random misfire or Cyl 8 misfire). The...

On the interstate headed home last night and the check engine light popped up. At this point I’m thinking “oh no, what now”. (Let it be known that I have already had to replace the original engine at 3500 miles for the ticking issue and a subtle double knock coming from the wristpins. New...

Hi Everyone, So I'm just beyond frustrated at this point. My 2016 Ecoboost Mustang has what seems to be an oil leak into plug well #2, causing oil fouling and rough idling on cold starts after the car's been run until good and warm and then let sit for a day or so. The roughness sounds like a...

I was on the way home from work tonight when weirdness ensued. I had shifted into 2nd gear (manual trans) a bit low, at about 1800RPM. I rolled on the throttle, then suddenly the car bucked as-if I had let off the gas, then quickly blipped it. It then started sputtering and spitting, running...

So this morning, I started my car like I always do and was driving. After about 3 minutes of the car being on, I was at a red light. Noticed the chassis was vibrating randomly a tiny bit. Like it was shaking. Looked and my RPMs and saw it sitting about 600/700 but it was going up and down...

Current problem with car: rough idle all the time whether cold start or hot. After a minute of idling the car will get very choppy and a/f will drop too 16-18, and lean out. Upon acceleration blinking check engine light goes on and does not level its self back out. I then turn off the car and...

Has anyone had an issue with a check engine light and a P0358 on a GT? Car has been having some rough starts and threw that code, began missing on accel and is at the dealer now.