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  1. 2011-2014 Mustang GT Tech
    My car has been running a little rough lately and I expected something to be wrong with it. Finally a check engine light came on along with 4 codes. P0305, P0308, P0316, and P2197. Changed the spark plugs and reset the codes to see if that was the issue. Well the codes came back on 5 minutes...
  2. 2005-2010 V6 Mustang Tech
    Hi all- I have a 2005 mustang v6 (5 speed manual), great car, drives fantastic, starts up easy, no check engine light, no codes. I bought the car a couple months ago. I have noticed that there is a randomly intermittent tiny misfire that causes a subtle popping sound from the exhaust once or...
  3. 2005-2010 Mustang GT Tech
    My 2005 mustang GT 4.6 had what felt like a misfire every once in a while from a stop. I got the spark plugs all replaced with motocraft OEM at the shop. Car threw a misfire on cylinder 5 as soon as I got it back. Shop reset the code and said my coil is possibly bad but to drive it for a day or...
  4. V6 Tech
    I had just finished replacing the decking the heads, replacing all the gaskets, and putting the engine back together 5 days ago on my 2002 mustang 3.8l. I had put all the fluids in (oil, power steering, and antifreeze) and let it settle for 24 hours. When I started the car the engine was shaking...
  5. 2015-2023 5.0 (V8) GT Tech
    2018 base GT 6spd manual TSP 1' 7/8 long tubes catless N2MB WOT BOX Ben Calimer stage 1 Mt-82 Centerfource SST Pmas intake Oil separator clutch line PBD e85/93 tuned Problem: Hi, I am slowly going insane trying to figure out why this is happening please help. Experiencing a miss or timing...
  6. Classic Tech
    Hey everyone. New to the forum and working on classics. I've got a 66 mustang with a rebuilt 302 that I believe has a couple misfires or partial misfires. Block casting date is from 68. Build is mostly stock with a mild cam, headers, and a four-barrel carb with a dual plane intake. Behind the...
  7. 4.6L Tech
    I have an '03 GT convertible with 110k miles. The car sat for a while before I bought it. The motor skips at idle when first cranked. It gets better once the motor is warmed up but never fully goes away when idling. Going down the road, the motor skips when taking off from a stop sign or red...
  8. 2011-2014 V6 Mustang Tech
    Hey everyone I’ve posted recently about my 2012 v6 car that I picked up that had a p0430 code with a slight mis, changed the plugs and an o2 sensor, I just changed the cats today, turns out the cats were toast, there was nothing left to them inside, but my car is still running with a slight mis...
  9. 2005-2010 V6 Mustang Tech
    I haven't quite figured this out yet, when I'm idling it misfires once it warms up a bit, it's cylinder 3 and 4, when I'm driving it's a 50 50 chance if I misfire at any given time. The recommendation that a older family member gave me was to run a higher weight oil through it, so that's where...
  10. 2015-2023 5.0 (V8) GT Tech
    I’ve purchased a 19 fastback with 30k on the odometer. When I first bought it, it had a CEL that was checked and deemed “incorrectly installed tuner.” Dealership said it was covered and the fixed it. A day later I was driving home and opened it up to around 95 mph and a flashing CEL came up. I...
  11. Classic Tech
    I bought a used 87 mustang with a carbureted 351w about a year ago, haven't been able to work on it for a while. I have finally been getting into it and am having a misfire issue with cylinder 1. I am not sure where the block came from but it is rebuilt with hypereutectic pistons, an unknown...
  12. 4.6L Tech
    I have 2001 Mustang GT that i bought a few months ago from craigslist. When I first bought it, the car ran great, I could hit redline no problem, but then the first time I took it to the track for drifting I started having problems. After a few runs, when i would clutch kick the car had...
  13. 2005-2010 Mustang GT Tech
    This has been a week long process so bare with me... First contact: So I'm driving to work (Fort Bragg) and my commute is about 40 minutes. My CEL light is on, but that is normal because i need a tune to remove rear O2s. My car started up fine, was fine on the highway, got to a red light and...
  14. Classic Tech
    Hi all, 66 coupe, 289 bored .030 over, mild Edelbrock cam with Edelbrock lifters, intake and 500 cfm carb. Has probably 2k miles on the rebuild if that. The car sat for the better part of a year in my garage while I did work to it, installing an electric fuel pump, subframe connectors, disc...
  15. 2005-2010 Mustang GT Tech
    On cold starts, my car misfires while accelerating. I have a wideband that I know is accurate, so I know it is leaning out. Knowns: Directly related to heat Symptoms dissappear after car heats up Symptoms are less severe/last less time when the car has been sitting outside in the sun all day...
  16. V6 Tech
    I need some help here. I just bought a used 99 v6 not too long ago and while driving in the rain the other day is started to hiccup and misfire. It has a CAI and the air filter is open to splashing from the wheel as there is no wheel well cover. Its been a few days since then and I'm getting a...
  17. 2005-2010 Mustang GT Tech
    Hey guys, today I went to go start my car and noticed the CEL was on. First time I've had the light so my heart sunk. My car is dyno tuned so I don't have a tuner or scanner, so I headed towards advance. I kept hoping it was just an o2 sensor. I got to the shop and they scanned the codes, they...
  18. 2011-2014 Mustang GT Tech
    Hello all! I hope all your mustangs are doing well! I have a bit of a story and hopefully you know or have an idea of a fix for me Ok so my engine blew in my mustang, so i had it rebuilt(6000 dollars later. please send help lol) so the engine should, SHOULD be fine. I had the crankshaft...
  19. 5.0L Tech
    I'm having an issue that started about 3 weeks ago. The car started to idle rough and occasionally surge at a stop, it would drop below 500 rpm then shoot up to around 1200-1400 rpm but if I gave it a little throttle it would clear up. Also occasionally from a stop it would have low power and...
  20. V6 Tech
    Hello, everyone. I'm new here and by no mean a mechanic, though I do understand how most of it works generally. This is my first vehicle and I've done a pretty good job of keeping up with tune-ups, oil changes, etc for the past year I've owned it. I own a 2003 Ford Mustang with a v6 engine with...
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