Hyundai - Elantra :: 2002 - Revving At Idle
Jun 5, 2014
I have a 2002 Hyundai Elantra that is exhibiting some strange behavior at idle.It wants to rev from 1500 to 3000 rpm, then back down, over and over again, every two seconds or so. This does not occur when the car is in drive or reverse; it purrs along at a consistent 1200 rpm.It all started with overheating and a water pump change, which was completed and reassembled.Then on startup, we began getting this revving. We double and triple checked the timing belt. We sprayed plenty of carb/choke cleaner in the areas of the vacuum hoses searching for a leak to no avail. Whenever we hookup the OBD code reader, there are no codes.Why does my car want to challenge everyone to a drag race, and what is causing this?
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2002 Hyundai Elantra GT 2.0L 140k miles
Symptoms:
- Intermittent rough idle when hot, slight shutter, surges between 700-800rmp
- Intermittent hesitation when accelerating, cylinder 2 misfire when hot and under load
- Misfires in all gears under load, mostly when under 2000rpm
- Code P0302 when scanned, no other codes
- Symptoms appeared suddenly, not gradually over time
What's been changed:
- Replaced spark plugs, little or no improvement. Old plugs looked worn, but generally in good shape with no significant deposits.
- Cleared code and swapped injectors between cylinders 1 and 2, after test drive P0302 code came back, so it seems that the injectors are good. If the injector were bad I would have expected the misfire to change from cylinder 2 to cylinder 1.
Inspection and Testing:
- Ignition System Testing
- Spark plug wires and primary coil are within specification.
- Secondary coil resistance is high on both packs. Could this be causing a problem with just cylinder 2? Is it worth replacing?
Spark Plug Wires: Specification: 5.6 Kohm/meter +- 20%Cylinder 1: 2.49 Kohm (Longest)Cylinder 2: 2.03 KohmCylinder 3: 1.64 KohmCylinder 4:1.36 Kohm (Shortest)
Primary Coil: Specification : 0.58ohms +- 10%Actual: .6 and .6
Secondary Coil: Specification: 12.2 Kohms +- 15%
Actual (Cold): 16.03K for Cylinder 2-3 pack and 15.94K for Cylinder 1-4 pack
Actual (Hot): 18.54K for Cylinder 2-3 pack and 18.44K for Cylinder 1-4 pack
Air/Fuel System Testing:Fuel system seems to check out. I do not believe the problem is fuel related. There are no obvious cracks or leaks on the intake manifold. A good spray of Carb cleaner all around the manifold causes no change in idle. I might try propane later. No obvious vacuum leaks.
Fuel Injector: Specification: 13.1-14.5 ohms
Actual: Cyl 1: 14.9, Cyl 2: 15.3, Cyl 3: 15.3, Cyl 4: 15.7
Compression Testing:Compression is not great, but within specification. Could the slightly lower compression in Cylinders 2 and 3 indicate a head gasket leak between those cylinders? Could this cause a misfire in Cylinder 2?
Dry Compression: Specification: 145-218psi, <15psi between cylinders
Actual: Cyl 1: 165, Cyl 2: 155, Cyl 3: 155, Cyl 4: 160
Oil/Coolant/Tailpipe:
- Oil looks normal, not brown or milky
- Coolant looks normal and is full, no signs of leaking (coolant has not been changed in a very long time, could a coolant flush work?)
- Exhaust looks and smells normal from tailpipe.
Sticking valve? How would I check this? Bad sensor somewhere? Doesn't a bad sensor usually throw a code?
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2006 Hyundai Elantra. RPM's go flying everytime it's fired up. RPM's will drop once it's put into gear, reverse or drive and runs just fine afterwards. If it's not affecting how it drives should we just let it be? Is there anything to be concerned about?
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I had some problems with my Elantra and I fixed (or tried to) them all this weekend. I needed a new IAC motor, the motor was reving up and down and I tested it, then changed it. I needed a fuel injector and changed that. I needed a lower thermostat housing and changed that.
These changes resulted in the following problems. The vehicle now revs at a high idle all the time at approximately 3000. What are the causes of this?
I know that when I was burping the coolant system (changing out all the hoses and the thermostat housing) I got antifreeze sprayed all over the top of the motor.
Here is the problems that I have now. Didn't have these before.....
The engine idles at or about 3000 rpm. Constant from startup until shutdown. It idles down when you shift it into gear but that is because of the strain on the motor with the brake used.
The transmission is now having problems shifting from 1st to 2nd. I checked the fluid, its good. There is however antifreeze on top of the transmission by some sensors. Do these sensors have anything to do with the shifting?
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My engine temp gets too hot when revving the engine but cools down at idle. The top rad hose is hot and the bottom rad hose is cool. I'm suspecting a stuck thermostat?
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I had driven my car over 13 miles when it went into an idle mode and would not go above 1250 rpm. After dealership did approved tests they stated #4 piston had 25 lbs pressure and needed to be replaced. After breaking down the motor, they dealership stated that my car was vandalized and I have attached picture of the wood chips sitting on the piston. Dealer stated that someone placed the wood chips down my spark plug chamber. First door always locked and 2nd no damage to the hood and 3td how was I able to drive 13 miles before the car shut down, 4th chips look like brand new with no damage and not discolored and there was no smell of fuel on the chips.
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I have a 2002 Elantra that has been in shop 3xs for same thing. The car says it is missfiring on 1 and I have changed wires, coil pack and spark plugs with no success.
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i have a 2002 santa fe which will not go into 5th and reverse So i have put a new clutch in and new oil ....
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Can not get it to start. Turns over. Replaced wires, coils, ECM, check fuses and fuel pump is on. Power to coils.
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when car dies driving or idle- will not start for appx 30min after- cranks over immediately like it wants to, but will not actually start for about 30minutes... is this a sensor?
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When car dies driving or idle- will not start for appx 30min after - cranks over immediately like it wants to, but will not actually start for about 30minutes... is this a sensor?
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Working on a 2002 Hyundai Elantra GT. 4 disc, no ABS. Problem is the brake pedal goes to the floor without much force. I bled all 4 lines, but no improvement. Rigid lines from the brake master cylinder to the rear wheels were very corroded, so I ran new lines. The old ones pretty much fell apart when I took them off the car. I also replaced the brake master cylinder. I tried to bleed the brakes again, but couldn't get much (if any) fluid pressure at any of the wheels. Yes, I found a couple leaks at the junction points for the rigid lines, but I re-flanged those connections and got rid of all the leaks. Still no real pressure when trying to bleed.
So, I tried a second, then a third master cylinder with a new attached resevoir. No improvement. I bench bled the snot out of this third master cylinder because the symptoms clearly suggest air was likely trapped somewhere in the system. I used a wood dowel to fully actuate the cylinder many times after all the air had been released while I had short clear hoses running from the master cylinder outlets into a little plastic cup filled with clean brake fluid. I wanted to make sure there was no way air could be in the MC, and no air drawn back in when I released the wood dowel.
Next, I quickly capped off the MC outlets and connected a hose to each brake line individually where they normally screw into the MC. I then let clear fluid drain through each line until it was spilling out clear of each caliper bleeder with no air bubbles. So, no lines are kinked, clogged, or contain air.
I took every precaution to keep air out of the system, yet when I push the brake pedal, there is still virtually no real pressure generated by the MC. The power booster rod is shoving the master cylinder in as it should. I don't think there's any problem with the power booster.
I've used gravity bleeding, manual "push & hold the brake pedal" bleeding, vacuum bleeding, and I'm certain there is no air in the lines or calipers. Still no significant pressure coming from the MC when I push & hold the brake pedal to the floor. It takes maybe 20-25 pounds of foot pressure, but always goes completely to the floor with all the bleeders closed. If the pedal is held to the floor, fluid slowly seeps from the bleeders. I'm used to it spraying when doing this on a healthy brake system.
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My wife has a 2002 Hyundai Elantra (5-speed manual) with about 185,000 miles on it, which has developed an issue within the last 2 months. The car acts like it is shut off for a split second - tachometer drops suddenly, check engine light flashes very briefly and you lurch a little bit as you lose power, but then after maybe a second, it is back to normal. This has happened while accelerating, cruising down the highway, and idling at a stop sign. The car hasn't actually killed while idling, but is close.
Had it in to a mechanic, and they checked for error codes but found none, and of course it didn't happen while the mechanic had it. On a recent 2 hour trip, it happened maybe 50 times? But hasn't happened for the last week. I should mention that we had the exhaust manifold/front catalytic converter replaced about 3 months ago, as well as a camshaft sensor (those had error codes before we changed them). We've done the recommended maintenance over the years, but are due for another plug/wire replacement (could this be the issue?).
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I bought an 02 Elantra last August with 128,000 miles on it. The front tires make a noise at almost any speed that reminds me of a 4X4 with mud tires going down a highway. I have replaced the axles, front struts, outer tie rod ends and one irregular rim, and I will replace the rear struts this weekend. Varying the tire inflation has no effect on the noise. When I got it aligned, the mechanic told me they had to swap the front tires to get the alignment within spec, and the uneven wear should cancel out. That was 3,000 miles ago and the noise level hasn't changed. The front tires still have 5/16 of tread on them. Should I keep waiting it out, get new tires, look for some other cause, see if there's a hole in the firewall I can soundproof, or what?
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When I start it up it won't idle untill you give it gas to 2500 rpms and slowly let off the pedal to 1000 rpms to keep it running and itll stay running. When you turn it off you have to redo it all over again. The plugs and wires were replaced. It started doing it couple days after the back 3 plugs and wires were replaced. Just got the fuel pressure regulator replaced and it still wont start up without giving it gas.
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My Elantra has been doing this for a while: While running (idle, driving slow, driving fast, doesn't matter) the car will lose power and will not respond to the throttle. It does this a few times in a row usually and then starts running normally. When running normally it runs perfectly fine, nice smooth low idle and good acceleration.
I started by doing a basic tune up: plugs, wires, oil change, air filter. No change. I then swapped the throttle position sensor. No change. You can see the symptom on youtube here: [URL] ....
What could be causing this?
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The headlight on the driver's side has burned out, should i move the battery in order to get to the bulb?
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The problem started when my clutch fluid began leaking a couple of months ago. I first noticed that it would take an unusual amount of effort to shift into gear and, after checking, found the clutch fluid completely gone and I filled it up immediately. Three weeks later, the fluid was gone again, so I took it in to a reputable mechanic, who said I needed my slave cylinder replaced. A week after replacement, I start to notice that my car increasingly had trouble "catching" into gear (my engine was accelerating, but not moving very fast; soft clutch). I thought maybe something went wrong with the slave cylinder repair and took it back to the same place, but the news came back that I needed a new clutch.
At 143,000 miles on the original clutch, I wasn't surprised it was time for a new one. Immediately after picking up my car with the new clutch--and by immediate, I mean right after I pulled out of the mechanic's parking lot--I noticed my car was driving horribly. The engine was idling extremely rough and it felt gritty when pressing the gas pedal during acceleration. I took it back to my mechanic the next morning to explain the problem, but they treated me like I was an idiot, didn't detect anything wrong with my car, and clearly didn't know what I was talking about even though I personally showed them my steering was shaking pretty badly while idling.
A few more days of the rough idle/gritty acceleration and I went back, but they just suggested getting my fuel injection system cleaned. I personally checked to make sure that the wires in my car were connected properly, as well as making sure the hose connecting to the air filter was on there correctly. Today on a whim, I took my car to Autozone to have them check the computer, even though I don't have a check engine light on, and sure enough the only code read was P0302--Cylinder 2 misfire.
My question is, what is the most likely cause of the cylinder 2 misfire (given my car's very recent history) and most importantly, could the mechanic have caused the problem I am experiencing? How should I handle this situation with them from here? I will no longer be using their services after I get this problem sorted out, as I feel like my car did not receive the best service.
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Our 2002 Hyundai Elantra is having issues. It shifts fine, no need to double-clutch. It stays in gear. Doesn't grind or anything crazy like that. It does seem like it isn't getting power to the drivetrain, and is having trouble climbing hills. This all came on very suddenly. Hubby thinks it's the clutch -- I think it may be the bushings. Though now, I'm wondering if it's something else? Since it's not having trouble shifting, should we be looking at the fuel system? Sensors? Engine seals?
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Looking for a rundown on LED versus halogen headlight bulbs, especially output and life? Stock halogen bulbs using 55 watts have a 4000K output, and I notice the Chinese imports' output is 3200-3500K. Does that translate into less bright? Also, the windshield wipers shudder across the windshield a lot unless there's a huge amount of rain--changing to new blades didn't make any difference.
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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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