Last post on May 04, 2013 at 7:24 PM
You are in the Hyundai XG300/XG350
What is this discussion about?
Hyundai XG300, Hyundai XG350, Performance Mods, Sedan
#2102 of 2117 2004 XG350 Accelerator problems
Jun 25, 2010 (1:09 pm)
Yesterday my wife's car, 39.6Kmiles, was having issues with the accelerator. She was driving on the highway and the car appeared to die. The engine was still running, but when she pressed down on the accelerator there was nothing, the engine would not even rev up. She coasted off of the highway and when stopped the car's check engine light came on and the car died. About 2 minutes later the car started back up, check engine light off, and she was able to drive it another couple of miles until it happened again.
I took the car to a shop (not Hyundai dealer-it's out of warranty) who was unable to locate a problem or duplicate the issue. My wife picked up the car and drove it home today without problems. I did some research and found that some owners have had similar issues and ended up replacing some sort of sensor: accelerator position sensor, accelerator sensor, accelerator relay or something of the sort. I called Hyundai Consumer Relations to explain the issue and he told me he could find nothing showing a re-occurring issue.
Does anyone know what the problem is or what I need to replace?
#2103 of 2117 Re: 2004 XG350 Accelerator problems [newtonx1]
Jun 25, 2010 (5:38 pm)
Google "hyundai forum" and do extensive searching. From my reading around the places, a lot of people had this problem with a bad MAF sensor. Perhaps there were the throttle position sensor issues too, but this specific problem with the car acting up for no apparent reason sounds like MAF. Feel free to correct me and definetely read up on it before you act. This is a very common problem on the XG300. I don't have it any longer(knock on wood), but remember the nightmare of dealing with the dealer back when I had the factory warranty. They replaced the complete transmission, as well as god know what else, and I still had the problem albeight less. They were having a great time charging Hyundai for the warranty work. NYC dealers are born shady i would suppose now it is a common enough issue to be covered in TSBs and they should diagnose it rather well. In the end I do not remember how it disappeared, as there was so much done on the car....read read read. When you armed with knowledge you will be much better off at the mechanic.
#2104 of 2117 Re: 2001 XG300L brake [psycho13]
Aug 08, 2010 (2:57 pm)
Today I had time to bring the XG300L to my mechanic for drive belt change and meanwhile let him check the brake. He said the ABS part is not working as he saw the ABS light is on all the time, but the brake is normal, not heavy as I described earlier. Actually the ABS light is intermittent. When I drove away it didn't light up at all. He does not have a scanner to check ABS.
By the way, TCS light is also intermittent with the ABS light. They are either both on at one time, or both off at other times.
#2105 of 2117 Re: 2001 XG300L brake [jiamin]
Aug 11, 2010 (9:04 pm)
So, is the pedal still heavy? Was it heavy when you came in to the mechanic? Or did it go away at some point in time before that? I still have the same problem, just living with it, as I got used to it kind of....my ABS TCS lights also come on occasionally, but quite rarely, and then go away just as well after turning off engine, or by themselves...
I am curious that all mechanics think that this is normal, when it obviously isn't. I don't feel like experimenting by changing all the brakes, rotors, flushing the system and having no guarantee that this problem is related.
#2106 of 2117 Re: 2001 XG300L brake [psycho13]
Aug 11, 2010 (10:25 pm)
Yes, it is still heavy, the same before and after my visit to the mechanic. It is heavy especially when I want to slow the car down quickly.
I don't agree with the mechanic saying "ABS is not working therefore brake is heavy...". ABS starts to kick only in extreme case, not in normal operation if I understand it correctly. So no matter ABS is working or not, it shouldn't affect normal and gentle braking.
#2107 of 2117 Re: Hyundai XG300 error codes [archer_bugz]
May 18, 2011 (10:02 am)
Did you ever figure out the issue. I too have a P1191 and P1193 issue.
#2108 of 2117 hyundai xg350l
Sep 04, 2011 (12:36 pm)
I canot get the fog lights to come on , they use to work but now they stopped. whats the problem.
#2109 of 2117 rear view mirror
Nov 12, 2011 (8:38 am)
The rear view mirror is very loose now. Does anyone know how to tighten it up?
#2110 of 2117 XG 350 cascading problems
Nov 25, 2011 (4:06 pm)
I have a 2003 XG350. It has a continuing series of issues that may be related or may be just lots of bad luck.
1) the Car occasionally will not start, battery is new and alternator has been tested as fine
2) yesterday the engine light went on
3) today the brakes barely work as they are completely with out any resistance.
Any thoughts? Would love to have some feedback before I take it to the shop.
#2111 of 2117 Re: XG 350 cascading problems [wraprevail]
Nov 25, 2011 (5:49 pm)
In all honesty, these issues are a virus with the model. I have asked before in this thread and while someone had a similar brake issue as mine, no one had any clear answers. In my case the brake pedal is stiff in breaking. Feels like only 30% of the power assist is actually working. I ve been driving like this for years now. The check engine light occasionally pops up for several weeks then goes away, usually just in time for a new inspection, which the car passes just fine.
To resolve all issues and eliminate all possible reasons, I would have to replace the coils, change the oxygen sensors, change the transmission and engine mounts, do a tune up, change brakes and replace rotors, check hubs and brake calipers. Check master brake cylinder and brake lines.
These are just the issues I am aware of on my 2001 XG300. Now you tell me if it's worth spending twice the money the car is worth?
This is no advice, but it's at least a reply, telling you aren't alone.
In your case it might be an easy fix, if you just experienced these issues in a row without problems before. Beware though, not to get dragged in into an escalating repair project and see if its worth your time and money.