2003 Accent GT rough idle? - Hyundai Forum: Hyundai Performance Forum
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#1 Old 10-25-2006, 08:48 PM
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Default 2003 Accent GT rough idle?

Ok, looking for opinions on why my 2003 Accent GT w/ 87.5k miles (all highway) is ideling rough. Bogs a tiny bit at low RPM, but notice it mostly when car is stopped, but in gear. Kind of bogs for a split second at random (few times per minute) intervals.

Today, check engine light blinked on and off for 5 seconds or so when turning a corner and throttling into it. It ha snot come back on.

Highway speeds and low mid- high rpm it runs fine.

Only mod is air intake (not cold air).

Thoughts appreciated.
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#2 Old 10-25-2006, 09:52 PM
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sounds like its spark.....when is the last time you changed your plugs and wires?

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#3 Old 10-26-2006, 05:23 AM
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CHanged plugs 2xs since I hae owned the car (maybe 3). I would say I last changd them around 45-50k miles?

have not changed wires.

I was thinking plugs too tho.

I will try it and see how it goes.

Thanks.
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#4 Old 10-26-2006, 07:53 AM
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Well just got into work (52 mile drive). Not only did it continue this am, but at 60mh, I go to hit the gas and felt a big boom when hitting pedal, then stuttered a little, then engine light flashed and now engine light is on.

After I got off the highway, still exhbited same low/off idel behavior, but not really any worse.
Weird as when it is in nerutral it really doesn't do it, but when in gear and stopped, it does.

Would bad plug(s) cause check engine light to come on?
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#5 Old 10-26-2006, 12:25 PM
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that sounds like maybe an air problem..let me ask.. are you using the stock MAF sensor housing on your intake? If you have the 1.5L they do not like to run without that thing. But that "boom" you said you heard........I dont know what the H**L that is but it sounds bad
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#6 Old 10-26-2006, 12:54 PM
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honestly, change your plugs and wires man, before you fvck something up

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#7 Old 10-26-2006, 01:48 PM
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First off, if you're having this happen when the car is cold that's pretty normal (but I don't think you are, mostly put it for other people reading the topic).

Change your plugs and wires. Check Engine light flashing means your engine is misfiring. Inspect plugs for severe fouling or any other faults that indicate a rich or lean condition or oil entering your combustion chambers. There are guides to this with pictures you can find with a Google search.

If that doesn't work I would do the following in this order personally:
change the fuel filter
buy a code reader or get codes read and go from there

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#8 Old 10-26-2006, 02:05 PM
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Thanks. Already have plugs and NGK performance wires on the way.

1.6l engine so no MAF I think (been running this intake for 2 years or so).

Getting oil change on Sat so they will get codes for me to see if something else.

Just sucks I have to drive 150 miles before I bring it in.

Have to work tomorrow and 52 miles each way.
Fuel filter was changed 20k miles or so ago.

Will driving it like this for another 20 miles or so (mostly highway) potentially screw up other stuff?

Last edited by mboy; 10-26-2006 at 02:14 PM.
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#9 Old 10-26-2006, 02:39 PM
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Until you know what the problem is , you run the risk of it getting worse. If you don't have any choice then you don't have a choice but i would think hard about driving it until you were better informed. Advance Auto -Orielly Auto-Auto Zone usually have the PC to plug in and get a trouble code. It is hard to diagnos a problem by reading posts but i agree with the plug plug wires. Checkem. You cancheck the heads of the plugs for discolorations and once again you find pictures of what things should look like on the net, and possible problems to go along if things don't look normal. The loud boom had to be exhaust unless a piece of your car flew off and i think you would have seen it. Sorry for your problems i hope it's easy to straighten out.

Marc
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#10 Old 10-26-2006, 02:41 PM
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it could definately screw somthing up....for now until you get your new plugs and wires....take the wires off ond clean them, take the plugs out and clean them aswell.....using a scour pad or a fine sandpaper, and then you can also see the plug condition ie. covered in oil, white, etc.

good luck man, keep us posted.

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