Elantra MD (2010-15) :: 2013 - Occasionally High Engine Revs At Low Speed
2013 Elantra has occasionally high engine revs at low speed. No check engine light. Transmission is not slipping .... Just high engine revs in traffic at low speed ( under 40 mph).
View 10 RepliesAvant - Audi A6 :: 1999 - Occasionally Stumbles / Misfire And Throwing CEL Code
We have a 1999 Audi A6 Avant (wagon) with about 190,000 miles. Best car we've ever owned, and want to keep her running until the wheels fall off (so to speak). We split our time between sea level and a ski town at 7000' (yes, that may be relevant).
Last spring our Trusty (sea-level) Mechanic repaired the exhaust system; both tailpipes were shot (car sounded like a tank). Rather than replace with Audi parts (was going to be a full exhaust system replacement - $000s) they spliced in some new tailpipe. Car ran quietly after that.
However, immediately thereafter (like, on my drive home from Trusty Mechanic's shop) and ever since the car will occasionally stumble (misfire) and throw a check-engine light. Typical scenario is after having been off the throttle while going downhill and then tipping into the throttle at the bottom of the hill, the car will stumble and on comes the CEL. Stumbling lasts 5-10 seconds then gradually subsides. Light stays on, though. Not 100% reproduceable under those circumstances (but doesn't really happen under other scenarios), but happens often enough to be disconcerting.
We recently decamped from sea level to spend the summer up in the mountains (great bicycling), and while the car misbehaved a couple of times on the way out of town, by the time we got to 5000 ft or so, the CEL was no longer illuminated. The car has not misfired once while at altitude despite plenty of situations that would presumably have triggered the issue, were we at sea level.
Trusty Mechanic has replaced some injectors, some coil packs, and the spark plug cables. No behavior change.
Elantra HD (2006-10) :: 2008 - Downshifting Occasionally At Highway Speeds
Have a 2008 Elantra GLS with 63K miles. A/T was serviced by dealer at 51K. Car now occasionally downshifts from 4th to 3rd when driving between 60 and 70 mph. Happens only when trans is hot (after 2-3 hours on hiway). When it occurs, it searches for the right gear, going back and forth from 3rd to 4th for several minutes before returning to normal. One thing odd is if I shut the car off for 5 minutes after it occurs, it runs fine afterwards. Do I need an ECU update or do I have a A/T problem?
View 11 RepliesElantra HD (2006-10) :: Engine Stopping / Rumbling When Change Gears Occasionally And Sometimes At Stop Sign
My 2007 elantra has been rumbling when i change gears occasionally and sometimes when stopping at a stop sign the car just dies. The car starts right up though as if nothing happened. It only happens like twice a week but i really want it fixed. I already changed the motor mount next to the engine block on the left. Could it be the motor mount connecting to the transmission?
View 1 RepliesFord - Focus :: 2004 - Stumbles Or Hesitates At Speed / Headlights And Dash Lights Flickering
Ford Focus 2004 manual 150K miles. Most days the car runs fine. Other days it will start and run until it warms up, then stumbles or hesitates at speed. When this happens the headlights and dash lights are also flickering. Sometimes i hear a clicking sound behind dash, left side. I have the sure cure: turn the heater fan to high. This works every time. When the engine is hesitating, i turn the fan to 4-high, the engine smooths out. Turn the fan down, engine again hesitates. Hesitates at 3, worse at 2, worst at 1. It seems to need the extra load.
But after few minutes of high heater fan, the alternator light comes on. I flick the heater switch down, endure the hesitation for a few seconds, the alternator light goes out, engine still hesitating, flick the fan to high, engine smooths out. A few months ago i could get it to fun smoothly with the fan on 3, didn't need 4-high. Now seems to need 4.On the days when it is always running smoothly, the heater fan can be on any speed, the alternator light does not come on.
Next few days or even weeks the engine will run smoothly, no hesitation, with the fan on or off or any setting.
The car has been to three shops in past year, one of them a major Ford dealer, who kept it two weeks. The problem has been diagnosed as battery (replaced), Battery connections (checked), plugs (replaced), fuel pump controller (replaced), fuel pump (replaced - ouch!), alternator (replaced twice - ouch twice), grounds (checked). Every time they "fix" something the car runs ok for a week or so.OBD shows P2004 (intake manifold runner stuck) but all agree it can't be the problem.
There have been a few times when i flicked the heater fan to high that all the dash lights died, fan went off, headlights off, turn signals didnt' work, but the engine ran smoothly. Not so good on the highway at night!There have been a few time, not recently, when the car wouldn't start. No dome lights, no dash lights with key turned to ON, no clicking or starter with key turned to START. It acted as if my battery was missing. The cure was to turn the headlights on. All normal after that.
Elantra HD (2006-10) :: Extremely Loud Rumbling Sound At Any Speed
I have a 2010 Elantra Touring, manual transmission. At about 30,000 miles it developed an odd feature which continues through the present time with just under 50,000 miles. At any speed and on any road from time to time I suddenly get a loud interior noise like driving right next to a train running on a track. There is no vibration, just a very loud rumbling sound drowning out the radio. Goes away after a few minutes, does not recur on the same piece of road, same temperature, or same time of day. When it first occurred the dealer inspected it and though they could not hear it they divined that the aftermarket cruise control mounting bracket had become loose and was vibrating. They tightened it and the sound went away for a year but is now back louder than ever. I checked the bracket and it is tight and the dealer can find nothing loose. The bumper to bumper warranty is about to expire. I am thinking a crack in a steel bearing surface or a bad weld causing a vibration running through the body. Again I feel no actual vibration through the steering wheel.
View 12 RepliesElantra HD (2006-10) :: 2009 5-speed Vehicle Refuses To Start
Love the car, but in the last 2-3 three weeks it just randomly refuses to start. Turns over fine but seems like its not getting fuel. It is most likely a relay that needs replacing. This relay apparently controls the computer and the fuel pump. Maybe I'm just looking in the wrong place. I hardly dare drive my car anywhere now for fear It will not start when time to go home.
In the meantime, I seem to be able to get the faulty relay to function (if that really is the problem here), by making sure lights and radio are turned off, and by turning ignition key just one click (listening to be sure fuel pump has loaded the lines) before actually starting the car. No point in running battery low cranking engine over and over, waiting for that magic moment when the car suddenly starts like there was never any problem at all.
Elantra HD (2006-10) :: Water Leak - Engine Would Not Speed Up / Running Slow
We began to have an issue today with our 2010 Elantra. While driving, the Check Engine, Check Coolant and EPS lights all came on. The engine then would not speed up but run slow. The tachometer stopped working.
It was coming into our neighborhood, so we got it to our house. After checking around under the hood (fluid levels, etc.), all looked good. Then we noticed that the mats and carpet are wet up under the dashboard on both the driver and passenger sides. When I reached up into the dashboard over the wet areas, I feel water all along the wiring, etc.
I am guessing that water has leaked in somewhere, maybe after the rain storm last night. We have had the car two years and less than 15K miles. Why and where water would be coming in?
Elantra HD (2006-10) :: 2009 - Speed Sensing Door Lock System
I am considering bringing my 2009 Hyundai Elantra to the dealer to have the speed sensing door lock system enabled! With the system enabled do both the driver and passenger doors unlock when you put the car back in park?
View 8 RepliesAccent MC (2006-11) :: Stumbles While Shifting Between 1st To 2nd And 2nd To 3rd Gear
My '07 seems to stumble when it's shifting from 1st to 2nd and 2nd to 3rd. At first I thought it was me as I spent the last six - seven years babying the tranny in my old Ford by 'lift shifting' but I've found it still does it somewhat when I'm accelerating and not letting off to let the car shift. Is this typical for the automatic in the Accent? I had the tranny serviced not 1,200 miles ago in June or July at Firestone and they assured me and showed me their fluid was compatible with SP III.
This happens especially when the car's cold or just warmed up. Seems to mostly but not completely go away after driving for a good half hour or so.
I've only got about a week or two left on the warranty but I also don't want to dump money into diagnostic fees if this is how these modern transmissions behave.
Suzuki - Reno :: 2006 - Stumbles Intermittently / No CEL
My girlfriend has a 2006 Suzuki Reno which is the hatchback version of the much more common Forenza. Mechanically they are the same car. I began to look into this car soon after I began dating her and realized it was simply a rebadged Daewoo product. I attacked the timing belt replacement early on as she had no idea when it was last changed. The old belt was all cracked up and in dire need of replacement when I did the job.
Since then it has just been a lot of small stuff, all things these cars or known for. We are now getting a new symptom. The car sometimes hesitates/stumbles when trying to maintain or gain speed at highway speeds, especially going uphill. There are no check engine lights and I have checked for pending codes. There are none. I figured a misfire would show up but no codes of any kind are present. There was an issue a while back with the evap system purge valve which I cleaned and reinstalled. I don't know if this could be the issue but it isn't throwing the P0496 code anymore like it was before I cleaned it.
These symptoms are very intermittent. She used to always put like 3 gallons of gas in the tank when it got near empty and never fill it up. I got frustrated and told her to fill it to the top at least every once in a while. The first time she did this these symptoms started. I wondered if she busted some varnish loose inside the tank that had not been in contact with fuel for some time. We put some fuel injector cleaner in the tank and it cleared up for a while but returned a few tanks later. It seemed to start as she was nearing the end of a tank and continued for a bit after the fill up.
I am getting the feeling this might be a fuel related issue and not the ignition system. I already looked to see if her fuel filter was replaceable and it is not. It is an in tank one that requires the tank be removed. I would do the fuel pump if I had to do this. My other thought is maybe the fuel pump is getting iffy. I am going to do a loaner tool on a fuel pressure gauge if this happens again as I am wondering about that. Also, I haven't looked into a fuel pressure regulator but that might be something to look into.
Accent MC (2006-11) :: Coughs / Stumbles And Throws A Flashing And Then Steady MIL
Happened in the last few days of Feb/early March last year. Start the car, it coughs, stumbles, and throws a flashing and then steady MIL. This time I shut the car off, counted 10, and ran just fine for the rest of the day. Last year I replaced the battery, but it was ~6 years old anyway.
View 6 RepliesAccent MC (2006-11) :: Misfire / Car Stumbles On Acceleration And Idles Sporadically
After almost an entire year of trouble-free running (with the exception of replacing a ground strap), my 2009 accent decided to start bucking and shuddering again. It only does this when warmed up, runs perfect cold. In the last 16 months, I've replaced the plugs, coils, battery, PCV valve, and ground strap. Car starts with zero hesitation.
Strong battery and starter, consistent output from alternator. After @5 miles, the car stumbles on acceleration, and idles sporadically. While looking at it tonight, I noticed a few exhaust brackets under the car had broken, and the flex section of the intermediate pipe had torn open. Could this presumed exhaust leak be causing the crap running performance?
My "exhausted" brain thought it could cause the O2 sensor to misinform the ECM, resulting in the P0300 code I pulled...
Accent MC (2006-11) :: Engine Stumbles And White Smoke Pours From Tailpipe Upon Acceleration
I've got 120,000 on my 08 manual Accent. Recently I've been getting white smoke after running it hard. It happens like this. I slow down from 70mph or so with the clutch engaged to about 40mph, then upon acceleration the engine stumbles and white smoke pours from the tailpipe. My guess is a leaky head gasket.
I had the dealer go through it. They pressure tested the cylinders and put a scope in them. They claim nothing is wrong with the engine.
I mentioned since they can vouch for the engine now, I'd like to get an estimate on trade in value. I don't think I want to keep it much longer.
Touareg :: V10 TDI Surging At Steady Speed Occasionally
Our Egg will occasionally surge at steady speeds - i.e it will jerk fore and aft with no change in accelerator pedal settings. This is an intermittent problem that seems worse when ambient temperatures are low. It isn't yet annoying enough to warrant a trip to the dealer (they seem clueless about this car anyway!).
View 12 RepliesBmw - 328 :: 2000 - Idle Speed Varies Occasionally
My son owns a 2000 BMW 328i... sporadically, and without warning, the motor will speed up at idle, going from 600 rpm to 1200 rpm, then down to 700 rpm, then back to 600 rpm. This happens intermittently, when the motor is warmed up...
View 3 RepliesSanta FE SM (2001-06) :: 2003 - Jerks Occasionally When Try To Gain Speed
2003 hyundai santa fe 2.4l ... When driving on highway speeds of 65 miles hour, I take foot of the accelerator and I put it back on to gain speed , it starts jerking or bagging. Also in the city when I press accelerator seems to have no power. I have no codes or check engine light on, what could it be?
View 2 RepliesRodeo :: 1998 - Engine Speed Occasionally Drops To Idle While Driving
have a 98 rodeo, with a V6 & Auto trans. have an intermittent problem - as I am driving engine will occasionally drop to idle speed and then pick back up to driving speed. Engine keeps running smoothly, just at idle speed.
CEL does not come on / no codes
Replaced Throttle Position Sensor - and thought I had found the problem, but since it is so random, it just didn't happen again for 1 1/2 weeks.
Elantra MD (2010-15) :: Trunk Lid Occasionally Opening Without Activation
Having problem with trunk lid ....... it is occasionally opening without activation ....... sometimes I'm less than a 1/2 mi from home, sometimes one to two miles from home ...... trunk just opens and button (trunk release) on key fob has not been pushed ???
View 11 Replies