misfire

  1. S

    Misfire on Cylinder 5, thrown the whole parts store at it

    2002 Mustang 3.8 Automatic 198,564 Miles Current mods: MAC OffRoad H-Pipe, K&N CAI, MSD Wires I got a code for misfire on cylinder 5 (P0305) a month after rebuilding the upper end of the engine (had a blown head gasket). The car ran extremely smooth and got great gas mileage before the problem...
  2. M

    Engine Running Issue after rebuild

    1987 5.0 Manual, timing chain broke after I finally had it running well Rebuilt with an upgraded cam. Original heads with a valve kit. Gear driven timing. Newer explorer intake Harness and A9L computer out of an 89 for the MAF conversion. EGR deleted since it has a newer explorer intake. All...
  3. Eilermoon

    Cylinder misfire due to oil on spark plug

    Hey all, I searched around but didn't see a thread dedicated to this specific topic; please link to one if I'm wrong! I've had a #6 misfire on my '03 GT first about a year ago and thought I had fixed the problem by swapping the ignition coil. It's been fine since then until about a week ago...
  4. 93CalypsoConvert

    Engine Help with stubborn misfire.

    Hello, I am running out of ideas trying to solve a stubborn misfire. I have a rebuilt carburated 302 running a light cam, but is otherwise stock. Problem is I am getting a fairly severe misfire at 0-25% throttle. Only misses while under load, no miss out of gear. This problem started a few days...
  5. R

    Engine Remove the Idiot from the equation. Idle/hesitation issue.

    Well after hours and hours of following guides and videos and blah blah blah.. I finally found the issue of idle surge, hesitation under throttle, stumbling, bad mileage.. etc. Incorrect spark plug gap.. and since people are going to ask they were gaped at .035 not .055 and here is the reason...
  6. J

    1992 GT not pulling hard and misfiring

    my fox was running fine up until a week ago. now when i floor it it doesnt pull hard, kind of hiccups. im also starting to hear weird pops when i let off the gas which i think is misfire. the idle is good for the most part but just yesterday i noticed it drop a little 2-3 times over the period...
  7. B

    I have a very different type of misfire

    So not that long ago, I ran the tank almost empty. I did not run out of fuel but I was with 6 miles. I have a 2005 Mustang GT and it’s slightly modified, so 6 miles is probably closer to 2-3 miles. Anyway, since that day, I’ve been having a horrible stutter on acceleration. It does happen at...
  8. 1

    Misfire Under Load At All RPMS

    Hi, so I just recently got my car street tuned (306, Cam, GT40 top end, On3 Turbo kit) and the car developed a misfire. During the tune the car was running fine, no misses or anything, but on my way home, I did a pull going on the freeway and it misfired on the top end under wide open throttle...
  9. B

    Trumpet after warmup (help!)

    Hey everyone, just bought back my first car. It’s a 2004 mustang 3.8 5speed. The owner I sold it to just rebuilt the transmission back in June and just swapped in a new motor w 80k miles last week. The car has a few strange issues though, the first was a random misfire on startup (first 1000...
  10. J

    93 mustang breaking up during acceleration

    Have a 93 lx that I bought a little over a month ago. Had some issues, and it sat for a while. New to fox bodies and still new to this car In general. So some insight from experience can help. Before I describe my current issue, I’m going to give some history on the things that I have done to...
  11. M

    02 mustang misfire

    I've been having this problem ever since I bought this mustang I changed few stuff, but I still have it. Hopefully you guys can help. I have a mustang 2002 3.8L coupe and it has the weirdest misfires at times. In the morning when the engine is cold It starts perfectly and It has no problems what...
  12. 8

    5.0 microsquirt mustang hits wall around 5000 RPM

    hello all, I'm new to the whole tuning scene and have been battling this problem for a couple weeks now. I have been asking around on the net for some help, but seems a lot of the sites are more about bashing and criticizing me for not knowing instead of helping.. One fellow i did run into that...
  13. D

    Engine 1999 v6 convertable

    Hello! Ive just had a problem with my stang. I didn’t know where else to go, or look so hope this is the right place! Last night heading home I bottomed out going too fast in my neighborhood, and it was loud! Anyway I didn’t notice any problems so just parked and went to bed. Well the next...
  14. M

    Having a Misfire issue after PI intake swap on 96 Mustang V8

    So, I did the intake manifold swap for my car. Went from a crappy Dorman intake for a non PI motor and put on the Ford Racing Performance Intake manifold. It was actually used and off of a 2002 Grand Marquis but same crap right. I now have a misfire. Yesterday she ran like a top! Now...
  15. R

    Help Needed! 95 5.0

    Hey guys I've got a serious ignition issue and at this point im just looking for other opinions 1995 Mustang GT 5.0 Bored and Stroked to 347, 5 Speed, Convertible California Car. So this car has been an ongoing project, did the engine and have been having serious ignition gremlins since...
  16. F

    Skip at low (<2000 RPM), new exhaust smell

    My 2003 GT started a skip a couple of months ago I attributed to a failing ignition coil (it’s happened before), I thought I’d wait it out and use my scanner when it got bad enough to draw a check engine light. Now, it hasn’t gotten worse, and it’s only at lower engine speeds, but now I smell...
  17. M

    Engine Oil, Smoke, Fire And Brimstone.

    Ok, not really the last two. Vehicle Information: 1993 5.0 litre in a 1990 Fox, A9L running GUFB strat on unknown def, aftermarket tb but not aftermarket MAF, knockoff cobra intake I think and possibly stock injectors. Hope this isn't the wrong board, suck at forums. I'll move it if needed...
  18. C

    Misfire That Fixes Itself For A Little Sometimes

    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...
  19. M

    Misfire Hesitation And Popping Sounds

    Hey, so I have a 2003 mustang gt and I seem to have problems with it starting up and running. So first off the car runs but it hesitates and misfires. So I'll have the car in 2nd gear and I'm cruising at say 2200rpm and then I floor it and it just starts to spit a chug and pop sometimes. Also it...
  20. merc123

    Engine Intermittent Power Loss Wot

    I've had an intermittent power loss issue at wide open throttle and I'm stuck. I can get car rolling and put into second (1500-1600 RPMs) and stomp it. It will hesitate and stumble a little (normalish) and then accelerate hard like normal. Then you can feel the loss of power all of a sudden...