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Car Forum / Hyundai Cars / August 20082005 sonata 2,4 missfire
Firstly my deep apologies for poor language skills as I am just a stupid dane. Now on to the real problem, I have bought a 2005 Sonata with 37000 km on it this february and I am not sure that it had the missfire when I bought it (haven't noticed) or if it is something that has developed over a couple of months. It is hardly to notice, only when accelerating in 3rd I can feel it to the extend that it bothers me. So anyway, took it to a mechanic for normal service and told him about it (he took a testdrive and felt it too), he replaced the sparkplugs but it has not helped at all. I called him to ask him what else could be the problem and he said that I should change from 92 octane to 95 octane, that might be the problem (something about keeping the low emmissions only when low octane), but that didn't help either. So now before going to the bank to get all my savings out so the mechanic can splitt the engine apart and find the reason for the cars behaviour, I thought I'd drop a line here and hope that somebody had an idea. Brian Your language skills seem just fine to me. You did not say if its an automatic or manual transmission. I've had two auto 2.4L sonatas in the last ten years and if yours is an auto xmission I maybe can explain what you are feeling. When you combine a low HP 4-cylinder with a auto xmission with torque converter lock-up and then program it to up shift quickly(to conserve gas), you will get a lugging sensation at low RPMs. Its similar to how a straight stick feels when you slow down and don't downshift quickly enough. This occurs in both of my Sonatas at 40-50 MPH with gentle acceleration. It goes away at highway speed and of course if you kick it a little, then it stays in lower gears longer and doesn't do it(or not enough to feel it). You have two choices, you can get used to it (ignore it) and laugh passing the gas stations or you can drive more aggressively and pay at the pump. I've long ago got used to it. If you have a manual xmission, I would think that you would have more control over the shift points and would not have the same problem. (but maybe so if you are trying to save money) In any case I would not start throwing a lot of money at it unless its really annoying. With all the electronic sensors these cars have in them, they will pick up on any serious problem before it causes a problem. They will very quickly detect and report a cylinder misfire. > Firstly my deep apologies for poor language skills as I am just a stupid > dane. Now on to the real problem, I have bought a 2005 Sonata with 37000 [quoted text clipped - 13 lines] > > Brian Sorry I forgot about the manuel/xmission, it's a manual gearbox. It is both at accelerating slowly and fast but it doesn't seem to be all the time. Also it was the mechanic that said it was a missfire and he said he could feel it not only in 3rd. but that he also could feel it in other gears. I have to say that he is not a autorized Hyundai shop and I have no idea if they can detect the problem with some kind of computer hooked up to car. But thanks for your imput, highly appreciated. Brian > Firstly my deep apologies for poor language skills as I am just a stupid > dane. Now on to the real problem, I have bought a 2005 Sonata with 37000 [quoted text clipped - 13 lines] > > Brian Hopefully, you haven't taken it in for him to tear apart the engine yet. There are other things to check before diving deep into the engine. I addition, one typically wants a good indicator that the problem is insid the engine (such as low compression or high cylinder leakage) befor diving deep inside. As has been mentioned by others, suspect plug wires. Also suspec ignition coils, fuel injectors, and the ignition failure sensor. While I'm sure I don't have complete information, I'm not convinced tha the mechanic looking at your car is knowledgeable enough to diagnose thi problem. I suspect you may be better off taking the car to someone else - Message posted using http://www.talkaboutautos.com/group/alt.autos.hyundai More information at http://www.talkaboutautos.com/faq.htm try spark plug wires ---- Posted via Pronews.com - Premium Corporate Usenet News Provider ---- http://www.pronews.com offers corporate packages that have access to 100,000+ newsgroups Replace plug wires and plugs as a set. If you have arcing in either the wires or plugs it will leave arcing on both so they must be replace at the same time > try spark plug wires > > ---- Posted via Pronews.com - Premium Corporate Usenet News > Provider ---- > http://www.pronews.com offers corporate packages that have access to > 100,000+ newsgroups |
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