Accent LC (2000-05) :: Cylinder 4 Misfire When Refueled
Mar 25, 2015
I have a 2004 Accent Gt with only 43k miles on it and I am getting a cylinder 4 misfire when I refuel. I have replaced the 4 spark plugs. The original code was random multiple and now it is just cylinder 4. I tried to swap 2 spark plugs to see if maybe there was something wrong with the plug but the misfire did not move to another cylinder. I've read about maybe swapping fuel injectors, where I can find directions on how to do that?
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I have an 02 Accent 1.5L that has a misfire on #3. I have replaced the head gasket, valve cover and gasket, intake gasket, timing belt, yes it was top dead center, MAF, Charcoal canister sensor, MAF, plugs, wires, coil pack, injector #3, and the compression in #3 is 130. What else to check. No other codes.
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2004 Hyundai Accent has is misfiring, after warming up, only in idle. This only happens after about 30 seconds in idle. Could it not be getting enough gas? This being said I was getting misfire on 3 as well but that would happen all the time and cause the entire car to shake. This problem is now fixed and only #4 is causing me problems.
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Car threw a multiple cylinder misfire, changed plugs, wires, and then coil packs. Code keeps coming back.
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I got a 2002 and its giving ma a po301. I know that means a misfire in cylinder 1. I replaced the Coils, Plugs and wires, and now its still there but the check engine light is flashing. What next?????
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I just bought a 03 accent the same day i bought it the CEL came on got it read and it was cylinder 4 misfire. took it to the garage the dealer i bought it from takes it to he said there was a little water around the boot in that weird little channel area under the cover he said he cleaned it up dried all out then reset the code and it was good, for a little about 2 weeks later it comes on again i get it read and it says cy 4 misfire again but also P0133 (o2 sensor bank 1 sensor 1) and i cannot remember exactly but i think the CEL came on after the exhaust started sounding loud, like it has one of those ricer mufflers on it.
Well I jacked up the car today and looked the only thing i saw was after the first cat right before the braided flex pipe there is this weird "shield" looking piece on the underside of the exhaust pipe dunno if its really supposed to be there or what it is for but from somewhere under that piece i can see exhaust coming out(its cold right now) also the flex piece is kinda blackened like its had exhaust fumes blowing on it for a while. i cant imagine why this would be a normal thing but i have never worked on hyunda before. i am thinking if there is some sort of "leak" there that is why the o2 code is showing. i am stumped, esp on the cy 4 misfire all sparks and wires look good i pulled each wire with it running and it bogs down til i plug it back in.
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I've got a 2000 accent 1.5, and I keep getting a code for a cylinder 3 misfire, when I change the spark plugs, it runs great for about 50 miles or so, then back to square one again. I just changed the coil pack the other day and there doesn't seem to be much of a difference. It has massive hesitation under heavy throttle, and the check engine light begins to blink if it sits and idles for too long. I've scanned it multiple times and it's always been cylinder 3, so it's definitely set on that one... I'm about stumped on what this could be. Also, the previous owner said that after a hot day of driving, the ECU fuse under the hood will blow out, what could cause either one of these things?
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I've recently purchased an 01 accent GS and I've replaced the timing belt, water pump, and spark plugs. Ive also got no cold air, and original struts with 119k on the vehicle. Those are the least of my worries now as my car loves quitting out at idle; and it does not get any better hot or cold. One of the plugs was completely black when it was taken out (not by me: mechanic work) so that's when they mentioned a cylinder misfire. they wanted an additional 100 to figure out what that could be attributed to on top of the 550 for the work mentioned above! I am now next to broke and want to see if I can trouble shoot some of the causes myself. I am thinking Plug wires, crankshaft/camshaft position sensors (if there are 2 dif ones?) MAF sensor, o2 sensor, injectors, and fuel filter. My understanding is that the coil pack controls 2 cylinders at a time and I just have 1 bad cylinder...I need to figure out where to start as I have no codes to work off of. also, I don't know how to assess resistance with an ohm meter.
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What is the easiest fix on this and what is the worse case scenario?
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I am currently having an issue with my 07 Accent misfiring on cylinder 1. So far, I have changed the spark plugs, which were due anyway, and checked the coil pack. Every coil on each cylinder reads 0.8 ohms, so I am going on the assumption that they are ok. Didn't see any issue with the connector end inside the boot. However, when I changed the plugs, I discovered that I had oil in the plug tubes on 1 and 4. So I changed the valve cover gasket and tube rings and cleaned all oil residue from the packs. I have also checked the short coil wire harness right on the packs themselves. Have not tried to check further because I don't know which pins that harness goes to on which ECM connector. I still have the misfire, and I'm not sure where to go next. I was thinking compression or fuel injector. I don't have a compression tester, and I assume the only way I can check the injector is to swap it with another cylinder?
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My car has been really acting up lately (AGAIN) so I took it in to have it looked at and they came back and told me it had multiple cylinder misfire, and they wanted like $1200 to fix it. What in the world does that mean and what is entailed in fixing it? They mentioned doing a full maintenance on it.
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2007 accent randomly starts missing. throws cyl.3 missfire. replaced all plugs and cyl.3 coilpak.
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I have a 2009 Accent. It has a misfire on cyl 3. I've changed the spark plugs... no change. I swapped around the coils... no change. The misfire stays on cyl 3. What are my next steps to isolate and resolve this misfire?
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My 2011 Accent's engine light came on recently. The mechanic said it was a cylinder 3 misfire and recommend changing the spark plug and coil pack for that cylinder. We did that over the weekend. Now the light is back on and has read 5 codes in the past 12 hours (4 at one time). They are P0303, P0304, P0003, P0403, and P0100. I have looked the codes up and can't discern if any could be caused by one main issue. About a month ago it read a code for the oxy sensor, but it went away and never came back.
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This morning my son started the 2008 Accent and it ran really bad, he shut if off started it again and still ran really bad and check engine light started to flash. Shut it off and ran for the bus to school.
Went and picked up a OBD scanner and found a cylinder 1 misfire. Tried to start it and had a really hard time and when it did start ran like crap and smelled gas. Checked the codes again and now got Multiple cylinder misfires, cylinder 4 misfire and cylinder 1 misfire.
Pulled the engine cover to pull the coils and plugs and I find a ton of mouse crap. No signs of any chewed wires or anything that I could see. Drove it to the local Hyundai dealer tonight because I am worried that it may not be the coil packs. Drove OK to the dealer. My brother is the service manager at the local Mazda dealer and he sees a lot of mouse damage. Said I should put a couple of old socks with moth balls in the engine compartment to deter the mice.
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I have a 2010 accent GL manual sedan. It has 104,962 KM on it, the warranty expired December 18, 2015. Since February this car has become a frustrating money pit. Being in the dealership constantly for repairs, then within a week something else 'happens' and back it goes. Spent almost $5000 in 4 months on repairs. Decided that's enough and will do majority of repairs myself.
Yesterday while drive on the highway I had a sudden loss of power and a check engine light came on. My scanner which has become a standard item in my glove box indicated a misfire on cylinder 2 - P0302. I limped the car home, in 3rd gear I was having a hard time staying above 2000rpm at 60km/h. at lights I had to use hand brake so I could keep my foot on accelerator, revs were dropping below 300.
Today I replaced all the plugs (all 4 were still in good or better condition, #2 showed signs of a slightly rich burn and #3 a slightly lean burn), replaced all coil boots (no cracks, no burns, and still pliable), removed and cleaned all the injectors. Error code P0302 persists.
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I have a 2008 Hyundai Accent that is giving me one heck of a headache. I keep getting a code for number 1 cylinder misfire. When you start it up it runs fine for a while then the CEL will flash and it will start running rough. As soon as I shut it off and restart it, it runs fine. I even experimented with it this morning on the way to work. It started running rough doing 60, I put it in neutral, turned the car off and then right back on, put it back in gear. It ran fine the rest of the way to work. I have swapped coil packs, fuel injectors, spark plugs, and have even hang tested another ECM. Still number 1 cylinder misfire.
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Make: Hyundai
Model: Accent
Year: 2007
Mileage: 70K
I've added Mystery Oil into my gas tank to clean fuel injectors as a maintenance precaution. I added it to a full tank of gas, when the gas tank was on low and I needed to get more gas, the check engine light came on.
The car was diagnosed with CEL reader from Autozone, misfire in cyl 3 is what the guy said. 3 full gas tanks later, it still has the same code and the car idles rough, hesitates and only seems to behave normal under medium to full throttle at higher RPMs.
I've been reading online for similar issues, as well as asking my friend who works as a mechanic at a dealership. Everyone seems to be accepting this behavior as normal and suggesting to wait out a couple of more gas tanks for the fuel injector cleaner to burn through.
I've looked at the spark plugs. 1,2, and 4 cylinder spark plugs have normal wear and tear. #3 has black build up, which corresponds with online pictures of rich mixture misfire.
I'm looking for a repair manual on another thread on this forum so I can take the injector from cylinder #3 out and look at it.
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I did not get the specific cel code but its what the guy told me at autozone.
Long story short. Washed engine, let sit for about 30 mins. Car started with flashing CEL and was "puttering" and very rough idle. Drove home took intake off and replace with stock, took spark plugs out and they were not wet. Then let it sit for about 15 mins. Started just fine. No CEL at all.
The accent saved the CEL and the guy told me that Cylinder 1 had a misfire.
My question is, should I do anything now even though the car seems to be running ok?
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So recently my 2009 hyundai accent has been idling rough, and has been very sluggish when accelerating. Usually the rough idling is the worst when the car is first turned on and tends to tone down as the car keeps running. I had the codes red and I believe it was C0302 C0303 C0304, saying that cylinders 2-4 were misfiring.
I replaced the spark plugs which didn't fix the problem, although cylinder 4 did have a small amount of oil above the spark plug and a little bit more below the spark plug, I am not sure if that means anything useful or not. I don't have a way to check the coils directly but I swapped coil 2 with coil 1 and checked the codes again and it was still cylinders 2-4 misfiring, so I would imagine that means the coil isn't the problem. I then tried spraying WD-40 around the vacuum tubes, and if the intake manifold is on the back of the engine I tried spraying it around that gasket as well, but I didn't notice a change in the idle speed.
At this point I am not entirely sure how to proceed, from what I have read the issue causing a misfire would be either there isn't a spark, which seems unlikely at this point, or the mixture of fuel to air is wrong. That is the part I am unsure of how to diagnose/
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We bought the car used for my youngest daughter and it had a couple of codes in it. 1st was the o2 sensor.. easy fix, grabbed an OEM one and stuck it in. Then there was the Cyl 2/ multiple cyl misfire codes that kept getting thrown.
I've seen a bunch of post about people pretty much doing the same things I started out with and still having a problem.....
1) Swapped around all the coils.. still got a #2 misfire... So, coils are good.
2) Swapped in NGK Platinum plugs with a .032 gap.... still getting misfire.
3) Replaced the crank shaft position sensor...... still misfire
4) Noticed that there was an Ebay injector in the #2 cyl...... when I pulled the plugs, that cyl was running a little lean..... bought an OEM injector to go back in there...... still getting misfire
SO, I tried using a propane torch head and putting out gas around the intake to search for vacuum leak and got no response....... so, for the heck of it, I went old school and grabbed a can of starting fluid and started spraying it on the intake around where it bolts to head... bam... found a vacuum leak on #2 cyl....... ordered an intake gasket off of ebay, spent about 3 hours on it pulling the intake and replacing the gasket,( the bolts had loosened up over time and there were small tears in the gasket allowing it to suck air) .. put the new gasket on, cleared the codes and it's been running perfect ever since.
Check for a vacuum leak where the intake manifold bolts to the head... might save time and money.
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