Elantra XD (2001-06) :: 2004 GLS - Sudden Rough Idle Under 1k RPM
May 10, 2015
I have an '04 Elantra GLS with 274k on it. I've been caring for it myself with basic maintenance; that said, I changed the oil in it about 100 miles ago. Halfway through my drive home it started to idle rough under 1k rpm.
I've noticed a lot of other Hyundai's have the same issue. What would be/is the most COMMON cause of this? Timing belt? Basic tune up? I moved a state away from my local shop and I refuse to go to a Midas/Jiffy/ect.
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I have an 04 elantra 2.0. Seems to idle rough when in D and foot on brake at the the lights etc. Put it into N roughness goes away.
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I have 2005 elantra ve and I got rough idle stop for a while.
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Below is a link to a video showing what my 2003 Hyundai Elantra is doing. It is idling very rough (Jerks at idle) and can actually be heard in the exhaust. I think it may be miss firing?? Does not do it at speeds over 60. Under 60 it can be felt at times, but only at low RPMs. [URL] ....
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2002 elantra hesitates and sometimes stalls staring from rest. Worse when cold but still sluggish after warm up. Where do I start?
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I had a rough idle and now car wont start. 2002 elantra, 4 cylinder. replaced tps, replaced fuel filer, cleaned IAC. I can hear fuel pump car wont stay running...
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2003 Elantra gt 90,0000 miles manual transmission. Rough idle under 1000 rpm it smooths out completely above 1000 rpm.
Also the engine makes a ticking noise from a cold start up. It stops making the ticking noise after 1500rpm or when the engine warms up.
Occasionally the car has a sputtering backfire. This happens when I park the car after being on the highway.
Replaced the plugs, wires, and the pcv valve. Dropped the oil pan and it and the oil pump pick up screen were clean.
The only check engine light to come on was for the speed sensor. It has since gone out on it's own.
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I just picked up an 02 Hyundai elantra manual trans that needed a transmission. ran fine before I replaced transmission but after putting it all back together the car now how has an erratic idle. it will rev from 2-4000 rpms. I tried spraying for vacuum leaks idle didn't pick up any higher. replaced tps and iac and didn't make a difference. the only thing that did make any difference is unplugging map sensor. dropped idle to about 1200 rpm but ran rough. could this affect the idle.
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I have a 2001 Elantra with 170K miles. well taken care of. I've been having a rough idle issue for some time now. The car idles very rough. I checked for codes and I got the cylinder 2 misfire code (P0302)...
I started out and replaced the plugs and wires, no solution...
I replaced the coil packs, no solution...
I replaced the MAP sensor, no solution...
I figured it may be no to low compression, so I did a compression test and all cylinders came back normal, still no solution...
I figured it might be a dirty injector, so I poured some seafoam in the gas tank, and no solution...
So my next step is to switch out the injector. Is there anything I am overlooking?
Here's the big thing that is happening too... Everytime I fill up the gas tank, I turn the car on and it idles even rougher. Like if you talk while sitting in the car, you sound like Chevy Chase when he is on the vibrating bed with Beverly D'Angelo in the movie vacation! LOL. It slowly goes away after 10-15 minutes of driving. All this rough running engine ONLY happens at idle, otherwise it runs very smoothly.
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I just purchased my first foreign car ever. it is a 2002 Elantra it idles very rough changed plugs using NGK and wires new fuel filter and ran 2 full tanks of high grade fuel with STP fuel injector cleaner. but had no effect on idle also have no check or service engine light. What to check next?
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We have a 1997 Saturn. For the past few months, whenever we're at a stoplight it suddenly fluctuates in RPMs, giving it a rough idle (going from 1000 down to 500 or so for a second or two, before coming back up to normal). It appears to be temperature sensitive (i.e. the longer the car runs or the hotter the outside temp, the more often this occurs). I sprayed the throttle body connection and vacuum connections to attempt to find a potential vacuum leak, with no effect. We've already had the transmission replaced, and haven't been having any other idle issues besides this. What else might be causing it.
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I have a 2004 Elantra with about 132,000 miles. I was out driving today and the transmission started to shift rough. Than at a stop light the car would not accelerate. I had to put the car into low or 2nd gear to get the car to move. Than the radio started to cut in and out and than the gauges on the dash started to turn on and off. When I arrived home and parked and turned the car off, it won't start back up.
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All of a sudden my fuel consumption dropped from 28mpg as read from the computer display in the dash, to 21mpg. This was not a gradual drop, it was at 28mpg one day and 21mpg the next day. There is no service light on, do these cars produce codes that don't trigger the service light?
A few months ago the vehicle was getting stuck in various gears and lunging, this was from battery corrosion dripping down and eating away at the transaxle range sensor. I cleaned up the battery and replaced the range sensor and the vehicle was driveable again. It re-learned the shift timing and seemed to be ok, then about a month ago it seemed to be forgetting the learned shift positions after sitting over night, I replaced the battery, thinking it was in a marginal state where it would forget the program while sitting. The shifting is still hard sometimes but this seems to have worked but, now my mileage is horrible.
I thought I'd just change out the oxygen and air flow sensors but, then looked at how much they cost now, and realized this would be some costly trial and error. Is there a methodical way to troubleshoot this issue, any way to pull the sensors and measure them?
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Driving in sunny so cal yesterday never a problem with the car just an oxygen sensor- I was cruising along at 75 and all of a sudden the oil light comes on - immediate loss of power and i pull over to the side of the road and shut it down. try to restart and it just clicks.....tugged on the crank through the wheel well and it will not budge...oil is ok and plugs were pulled and they seem fine....oil pump...fuel pump....starter hopefully something simple and inexpensive I hope.....what is the difficulty in changing out the starter and could this be the issue?
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I recently had my oil changed. And when I was driving home noticed my clock had reset. I have a brand new battery. I set the clock back to the right time, then headed out of town the next day. When I went to turn off the interstate my blinker did not work at all. When I pulled into a station I saw neither one worked.
My 2006 Elantra is also suddenly using double the amount of gas. I took it to a place 2 days later when I got home. The turn signals decided to start working the second it went in the shop, yet hadn't worked 10 minutes before I got there, and they didn't know what the cause of the clock resetting itself would be, or the higher gas usage.
I did have somebody check to make sure my battery cables were tight. I am at a loss yet these problems all started at the exact same time. What I could have checked? My car ran great before this last oil change. Now I don't even go out of town because of it hogging gas.
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As the title says the 2004 Elantra only has a/c at idle and low speed. It started with the a/c stopping, and a mechanic gave me as story about the wiring going to the compressor being faulty. He jumped a wire from the drivers side fan to the compressor. It turned on the compressor and I had cold air again. or so i thought.
Now, it's cold at idle or slow around town stuff, but as soon as I get on the highway it stops working and blows outside temp air. Is it the compressor? If not, I wondered if the fan (drivers side) is turning at highway speeds and not back on till I stop.
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04 Elantra GLS, AC works great and is icy cold at higher RPMs but gets hot when stopped at idle or driving low speed. Fan works, refrigerant level is correct. At low idle speeds the compressor just shuts off. A few minutes later or if the engine speed picks up it will engage and start cooling again. AC tech didn't think it was the compressor since the pressure difference between the high and low sides was in the correct range. Has this issue fixed by replacing the pressure sensor/switch on the high pressure side? It doesn't look like there is a low pressure side sensor that I can see.
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A few days ago, I started my wife's Santa Fe (106k miles) to warm it up and it had a rough idle. I gave it a test drive and the engine light came on and off a few times as it sputtered down the road. I retrieved the codes with my scan tool and it showed - P0300, P0304 and P0306. After some researching, I decided to change the coils, plugs and wires (under upper manifold) this coming weekend.
I have seen the web page instructions for doing this on a 2.7L [URL] .... but it has less stuff around the manifold compared to our Santa Fe. These instructions doesn't include coils was well since the plugs in front use just wires.
My question is.. Is there a set of instructions for the 3.5L for removing the manifold?.. From a less intense standpoint, maybe some of the hoses and cables can stay intact just to move the upper manifold or lift it to the side?... Also, Cyl 2, 4, 6 are the three sparks plugs in the front? 2004 Santa Fe 3.5l ....
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I have a 2004 SF/2.4 I4. When the car warms up, the ignition coil sparks between the rubber boot and the coil itself, drawing the spark from the plug and resulting in a misfire. This is especially apparent when the A/C is running and the car is idle-ing, resulting in the A/C turning off and a rough jumping idle. Once the car is running this is not noticeable and the A/C turns on.
I have changed the spark plugs to new autolite plugs, and the situation disappeared for a day, but now it is back. I ordered OEM NGK Laser Iridium plugs, I hope they will fix the situation. Why would the A/C matter? Next on the list will be the ignition coil and wire change, but I hope to avoid that.
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I own a 2010 elantra. I'm going through plugs like crazy. I've changed it twice and the dealer has changed them twice for a total of 4 sets. I have 64000 Kms on my car. The problem is rough idle when ac is on. I'm assuming drag or load on the engine makes plugs work harder.. So the last two sets of plugs the dealer showed me the plug and the white spark plug casing was burned through? Kinda getting sick of the bandage approach the dealer is throwing at me. He said if it happens again which I'm sure it will they will sort it out in more detail to find the cause.
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Have a 2009 Elantra 4 door, manual. It is at 52000 kilometers and recently in the spring changed the oil, I run Full synthetic.
Lately its been really hot and the following problem occurs, no engine light or anything. But if I start the car cold it idles no problem, nice an smooth, If I go out for a 30min drive, come back and let it idle its rough. Not crazy rough but its rougher than it should be. I have no power issues, it pulls well, never stalls. If I shut it down and wait a few hours, engine still hot, but not super hot, start her up and runs well, no rough idle.
Go out for a 15-20 min drive and park it, idles rough. I checked the usual, wires, plugs, pvc valve seems good. Engine temp is normal also. I did some searches on the site but come up mostly with cold idle issues, not great when cold not so when hot.
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