2017 Elantra, intermittent cylinder 3 misfire p0330
#12
11-14-2023, 04:29 AM
There are tools that can do what a flight recorder does and the vital signs of the engine are recorded as the vehicle is driven. The data can be reviewed and then see what is dropping out or changing and then go from there. Not too many places have that equip or knowledge of how to examine the inputs and spot when something is not as required. A good mobile mechanic might have that tool and the knowledge to obtain that info.
It is just like anything else, you have to find the right person/shop ti diagnose the problem. It can be done. The misfire is the result, but the root cause needs to be found and that can take a little time and effort.
It is just like anything else, you have to find the right person/shop ti diagnose the problem. It can be done. The misfire is the result, but the root cause needs to be found and that can take a little time and effort.
#13
03-28-2024, 12:32 PM
Hi,
First time posting on this forum and have a bit of an ongoing story of my 2017 Elantra engine. Basic story is that I've been having a cylinder 3 misfire for over 2 months now that has not been properly repaired to this day. I am a mechanic and I am not attacking the mechanics at the dealer as I know intermittent issues can be tricky. There are a few issues I didn't like while dealing with them.
1. CEL came on, I hooked up my shops scan tool, found misfire on 3, did not clear the codes and booked it into the dealer for the next day. They phoned me later in the day, said they could not get a code to appear and said to come pick it up. I sent them a picture of what I found with my shop scanner and they decided that was good enough and did a coil/spark swap from cylinder 3 to 2, they drove it said no codes came up and if they did, bring it back and they would know if there was an issue. I left the dealer and code came back on within a block, brought it straight back. They scanned it and said same misfire on 3, I left it with them and they worked on it the next day, which ended up being an ecm update, courtesy of a technical service bulletin. I picked it up the next day, drove it home and no issues. Thr next morning on the way to work it started misfiring again and CEL came on. Back to the dealer.
2. They have my car and update me telling me that my spark plugs need changing, I need a fuel injection system cleaning and my air filter was plugged. I immediately phoned them and asked the service writer to go look at my air filter as I changed it a week prior myself. He came back and said it was brand new and the tech put it on the wrong work order (everything else matched up though?). I objected to both the spark plugs and system cleaning as the code would have switched from cylinder 3 to 2 if the spark plug was bad. This was not covered under warranty and I ended up doing it for the sheer fact to have it on file of them doing it. They did the spark plugs and injector service cleaning. The code came back as soon as I left the dealer. They told me that sometimes it takes a while for the system cleaner to get through and will run rough, I asked why they didn't drive my vehicle or warn me about it. Car goes back in.
3. Next day, service manager phones me and let's me know they found the issue, leaky injector! Right on, they found it, perfect, but no injector for a week and they have no loaner vehicles. They take a used injector from another car and put it on mine so I can drive it to work, a few days into driving it, it starts to misfire again and CEL comes on (this is very intermittent and the CEL comes on and goes off within seconds). I phone the service manager and tell him it's coming on with the used injector, he says that's odd and there's only a tiny chance that the used injectors also bad. He tells me I can still drive it, should be fine until the new injector comes in. I know it won't work with the new one but I'm not a Hyundai technician. I bring my car in a week later for the new injector, get it installed and am on my way. A few days later, same thing, misfire and CEL. Back to the dealer.
4. I was gone on a small vacation for a week left it there and told them I'd be gone until the following Friday. I got a message from the service advisor on the following Friday saying the technician drove my vehicle and it was good to pick up. I asked what they repaired and she said nothing, as there was no code and the issue couldn't be replicated. I told the service advisor that the service manager had told me they were going to rip it apart if they have to to figure it out and I didn't want it until it's fixed. So I had to wait until the following Monday to talk to the service manager. He had it there for another few days and finally got the code to come up and said they believe it's the intake manifold gasket. I waited a week, they got the part and installed it, I drove it until today and the CEL is back on.
Long story for people to read, but this is my experience so far with my Elantra. At this point I don't know what to do, I'm 5 hrs away from any other dealer and just want this repaired.
First time posting on this forum and have a bit of an ongoing story of my 2017 Elantra engine. Basic story is that I've been having a cylinder 3 misfire for over 2 months now that has not been properly repaired to this day. I am a mechanic and I am not attacking the mechanics at the dealer as I know intermittent issues can be tricky. There are a few issues I didn't like while dealing with them.
1. CEL came on, I hooked up my shops scan tool, found misfire on 3, did not clear the codes and booked it into the dealer for the next day. They phoned me later in the day, said they could not get a code to appear and said to come pick it up. I sent them a picture of what I found with my shop scanner and they decided that was good enough and did a coil/spark swap from cylinder 3 to 2, they drove it said no codes came up and if they did, bring it back and they would know if there was an issue. I left the dealer and code came back on within a block, brought it straight back. They scanned it and said same misfire on 3, I left it with them and they worked on it the next day, which ended up being an ecm update, courtesy of a technical service bulletin. I picked it up the next day, drove it home and no issues. Thr next morning on the way to work it started misfiring again and CEL came on. Back to the dealer.
2. They have my car and update me telling me that my spark plugs need changing, I need a fuel injection system cleaning and my air filter was plugged. I immediately phoned them and asked the service writer to go look at my air filter as I changed it a week prior myself. He came back and said it was brand new and the tech put it on the wrong work order (everything else matched up though?). I objected to both the spark plugs and system cleaning as the code would have switched from cylinder 3 to 2 if the spark plug was bad. This was not covered under warranty and I ended up doing it for the sheer fact to have it on file of them doing it. They did the spark plugs and injector service cleaning. The code came back as soon as I left the dealer. They told me that sometimes it takes a while for the system cleaner to get through and will run rough, I asked why they didn't drive my vehicle or warn me about it. Car goes back in.
3. Next day, service manager phones me and let's me know they found the issue, leaky injector! Right on, they found it, perfect, but no injector for a week and they have no loaner vehicles. They take a used injector from another car and put it on mine so I can drive it to work, a few days into driving it, it starts to misfire again and CEL comes on (this is very intermittent and the CEL comes on and goes off within seconds). I phone the service manager and tell him it's coming on with the used injector, he says that's odd and there's only a tiny chance that the used injectors also bad. He tells me I can still drive it, should be fine until the new injector comes in. I know it won't work with the new one but I'm not a Hyundai technician. I bring my car in a week later for the new injector, get it installed and am on my way. A few days later, same thing, misfire and CEL. Back to the dealer.
4. I was gone on a small vacation for a week left it there and told them I'd be gone until the following Friday. I got a message from the service advisor on the following Friday saying the technician drove my vehicle and it was good to pick up. I asked what they repaired and she said nothing, as there was no code and the issue couldn't be replicated. I told the service advisor that the service manager had told me they were going to rip it apart if they have to to figure it out and I didn't want it until it's fixed. So I had to wait until the following Monday to talk to the service manager. He had it there for another few days and finally got the code to come up and said they believe it's the intake manifold gasket. I waited a week, they got the part and installed it, I drove it until today and the CEL is back on.
Long story for people to read, but this is my experience so far with my Elantra. At this point I don't know what to do, I'm 5 hrs away from any other dealer and just want this repaired.
i've had my used 2015 Hyundai Elantra for 18 months. For the first year straight the car drove seamlessly, over the last 5 months i've had misfiring issues. Changed oxygen sensor, catalytic converter and fuel pump so far nothing has fixed it. Have tie rod issues. The misfiring is on and off and the hyundai dealership where it was last repaired os saying to change the catalytic converter manifold after just changing the fuel pump a week ago. I'm so tired and frustrated and have not gotten it resolved. The car has been to the mechanic over 6 times
#14
04-09-2024, 03:38 PM
i've had my used 2015 Hyundai Elantra for 18 months. For the first year straight the car drove seamlessly, over the last 5 months i've had misfiring issues. Changed oxygen sensor, catalytic converter and fuel pump so far nothing has fixed it. Have tie rod issues. The misfiring is on and off and the hyundai dealership where it was last repaired os saying to change the catalytic converter manifold after just changing the fuel pump a week ago. I'm so tired and frustrated and have not gotten it resolved. The car has been to the mechanic over 6 times
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