Question about 2003 Hyundai Tiburon

6 Answers

I have a 2003 Tiburon - automatic. I will be driving and the RPM goes way up and then the speed I am going will drop. Took it to the shop and they said nothing wrong with it and that they drove it with no problems. Two days later I am driving and the RPM goes up to 3 and my speed drops from 45 MPH to 40. Shortly after that, it revs up but I was unable to go more than 35 MPH on the way back to the shop. And it was jerking the whole way there. Instead of their driving it immediately after I brought it in they waited until today and now they say they don't see a problem with it - when they drive it, it seems fine when they drove today, no engine light comes on and there are no codes, They said they will see about possibly replacing the throttle position sensor and will periodically drive it to see if the problem comes up. I think they need to drive it for a longer period because I know my car and how it normally feels and this just isn't right. I am not sure what that is but I definitely don't feel safe driving it after the way it was driving yesterday. And I don't like their acting like I must be imagining it. I am not.

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  • 2 more comments 
  • jlg9 Sep 02, 2010

    Is there anything else that may cause this problem? And if this is the problem why replace the throttle position sensor?

  • jlg9 Sep 02, 2010

    I would like to get an additional opinion if possible as the two solutions suggested previously are so diverse. Or at least someone who agrees with eitehr solution one or two or possibly having both checked out as possibilities. Thanks.

  • jlg9 Sep 02, 2010

    Thanks. Actually the fact that you mention the fuel tank is interesting as I do have a rumbing noise (almost like a motor noise) that I have complained about as well. I hear it when I am in the car with the motor running with the radio and A/C off and it sounds like it is coming from the rear of the car on the driver's side (which is where the fuel tank is located). I had hoped it was the antenna being loose but when I tightened it yesterday and noise persisted. Of course, the mechanics never hear it when in the shop. When I said somebody should sit in the car with the doors closed last night they didn't do so. Whether they did today I haven't a clue. I don't understand why they didn't just drive it right then instead of waiting until today. It would have saved us all a lot of trouble.

  • jlg9 Sep 03, 2010

    They finally were able to get the problem to duplicate and have determined that it was the fuel pump - they have replaced it and fortunately it was still under warranty. Thanks to everyone for their help. I am keeping my fingers crossed that this is the end of the problem.

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6 Answers

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  • Master
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Hello. I would say that the RPM sensors are acting up. This intermittent problem can be hard to nail down. If it continues I would have it scanned while driving around and consider replacing the RPM sensors. J.

Posted on Sep 08, 2010

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  • Master
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Hi!!

My sister has one of those sharks too, So I am kind of familiar with it. If the rpms go up and the speed goes down, the problem could be related to the transmission, it could be the transmission speed sensor or shift selenoid.

But, let's start from the bottom, have you had your transmission serviced?? Check fluid level, color and smell. the color should be pinkish and should not smell burnt. If any of this is true, it will be a great time to service your tranny, it is part of the maintenance anyway. Most transmission shops will do a free transmission diagnostic, it won't hurt to have it done.

Once we get this out of the way, will move into something else. Good Luck!! Keep me posted!!

Posted on Sep 04, 2010

  • Rene J Solis Sep 04, 2010

    Also, check fuel filter and fuel pump pressure, if you do not have a tester, borrow one from Autozone. I thought I mentioned this earlier. Keep me posted!

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  • Master
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If you hear sound from fuel tank them to chek it out and check the fuel flow also

Posted on Sep 03, 2010

  • INDIRA KUMAR
    INDIRA KUMAR Sep 03, 2010

    Check the fuel pressure ..Check if is it at normal levels when you increase the RPM

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  • Hyundai Master
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Try replacing the spark plugs and wires, clean the induction system, and at your next fill-up run a bottle of injector cleaner through it and see how it helps. Also, it may be time for a timing belt. Thats just a general maintainence item, but an important item.

Secondly, I don't think you're problem lies in the plugs. Hyundai uses a laser-platinum plug that typically lasts a good while.
You could change them and see if it helps, but I kinda doubt it.
Do you have a check engine light on by chance?

The fuel filter is in the tank, therefore a pain in the *** to do. Have to take the fuel pump out and go from there. Don't get into that, its not the problem. I feel you need to service the induction system using a vacuum flush.

As you drive, carbon builds up in the intake, throttle body, and eventually the valves. The vacuum flush runs a highly powerful cleaner through the system and flushes out all the carbon. This frees up sticking valves (which would cause the poor acceleration that you mentioned.) and blows all the gunk out the exhaust. Be very careful about injection cleaning as it can damage the sensors in the motor. The cleaners in detergent gasolines are adequate; higher concentrations can cause damage to sensors.

Keep us updated.

Posted on Sep 02, 2010

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  • Hyundai Master
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Sorry but they should have driven it straight away ,anyway by the sound of it and what you have described i think the front clutch is worn which will not show up with any code reader ,now also you will not be able to read the codes on this vehicle as YES it has an OBDII under the dash but this is only for the american emmisions test as the diagnostic plug is under the bonnet and its difficult to get the right plug for a diagnostic machine ,later models from 2005 onwards are now using encrypted software and their own diagnostic plug under the bonnet .best advice is take it to dealer let the engine go cold so when they drive it its ok as the parts for the front clutch on an autobox are unavailable as only an exchange gearbox is listed in the parts spares screen ,Best vehicle i can recomend is a ford focus diesel manual ,50mph or a peugeot their very good as well or if funds exist then a VW polo diesel manual .Any of these vehicles will suffice and the money you will save on fuel over 2/3 years will more than compensate plus of course the very high resale value of a small diesel car ,they fetch more after five years than a monster gas guzzler like a merc or porsche .

Posted on Sep 02, 2010

  • Colin Stickland
    Colin Stickland Sep 03, 2010

    if the RPM goes up and the speed drops then its a drive problem ,not a fuel metering problem ,still say clutch is slipping and its a expensive repair so sell it quick .

  • Colin Stickland
    Colin Stickland Sep 03, 2010

    noise in back?? wheel bearing rumble

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  • Master
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Hi, this a very common problem with the Hyundai Tiburon and Tucson. Check the air filter below, it should be disconnected from the air filter canister. Try to reconnect it and see if the problem will stop as this has solved similar problems on Hyundai...

Posted on Sep 02, 2010

  • Tunde Autos
    Tunde Autos Sep 02, 2010

    The mechanic are looking at the possibility of replacing the throttle position sensor because they don't know the cause of the problem which i have given to you based on past precedence of the car....

  • Tunde Autos
    Tunde Autos Sep 03, 2010

    ........

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My 2003 Hyundai tiburon gt v6 (automatic) idles at 500 rpm in drive after warmed up is this normal? It's not throwing codes it just feels like it's shaking a bit


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Hello I have a Hyundai tiburon 2003 v6 GT. I don't


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