Accent MC (2006-11) :: Starting With A Try Of Three To Four Times And Then Giving Knocking Sound
Sep 12, 2014
I am seeking to identify a problem my hyundai accent model 2009. when it s cool or started with a time period gap between four to five hours. it some times not start with a try of three to four times and then start but giving some knocking sound, it went away after five minutes . once start and warm it is ok and again started when warm.
I did computer check but it result is normal and have changed also the spark plug and fuel filter but problem still exist. the problem may in timing belt -or fuel pump may any other reason.
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I have recently noticed that my Azera makes a "knocking" sound right after starting the engine. It just about a dozen of fast short knocks one after another and it is gone after 2 seconds (like a diesel engine started on low temp. It appears more often when the engine is rather cold.
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1) After 10000km the car started to develop some front suspension knocking sound going over potholes. After three trips to a dealer they finally said that it was a loose stabilizer bar which apparently is "very common". They tightened it and the problem seemed to go away. Now after 40000km the problem seems to have came back. I am starting to think that maybe it is somehow related to cold temperature because it seems to get a little better once the car has been warmed up and it has been going for some time.
I don't really care about the noise, but I want Hyundai to fix it if there really is a problem.
2) When driving 40-60km/h with the sunroof open I get a resonant wobbling sound. If I open one of the windows just a bit it disappears. Sounds like a poor sunroof wind deflector design to me. (I have driven Mazdaz and Hondas with sunroofs and none of them had that problem)
3) Whats up with those super heavy 16' aluminum wheels!!!! Is it just me or it feels like they weigh more then the steel ones? The car even feels faster when I put on my winter tires on steel rims.
Other then that the car has been pretty good. I am not getting anywhere near the factory specified fuel efficiency 6.5-7.5l/100km hwy and 8-9l/100km city, but I do drive it fairly hard, so that is OK. It still amazes me though that my 15yr old civic was getting the same mileage with a comparable performance. You would think that there would be some progress in automotive technology....
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2010 Prius making knocking sounds. Not exactly the "death rattle" that sometimes happens when you first start the car.
* While driving, the sound reminds me of the Raptors in Jurassic World.
See example videos:
Knocking at idle (Knocking Noise starts at ~19 seconds into the video):
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Knocking while driving: (Good examples at ~24 seconds into the video):
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Knocking while driving with Torque OBD2 Monitors: (Noticeable example starts at ~28 seconds into the video):
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The car has over 300K miles and the problem started a few months back. At first the sound only occurred while driving under certain load conditions.
The problem would occur at intermittent times. Normally at low speeds with heavy loads (going up hill with low to medium acceleration). Also occurring for a short time when letting off the accelerator. Never occurring at moderate to heavy acceleration. Never at idle. Recently the shaking / raptor noise started to occur while idling.
* This problem is now easily created at idle each and every time the HV battery drops below 2 bars and requires charging. The engine change is immediate and starts and stops in sync with the extra load of the HV battery charge cycle.
Placing the car in the maintenance mode, the car will start and idle normally then immediately start and stop the knocking when it switches from HV charging to non-charging mode. There are no Check Engine light. Things I've done to troubleshoot the problem:
* Swapped the following parts with another working 2010 Prius.
** Coils and spark plugs
** VVT solenoid
** Cam Sensor
** EGR Valve Control
** Fuel Injectors
** MAF Sensor
** MAP Sensor
** Evap Control Valve
* Cleaned the intake manifold (It was full of carbon)
(This was done about a month before this problem started to intermittently appear). Prior to cleaning the intake manifold the car was shaking and misfiring under certain high torque condition and generating a P0304 check engine code). Once I cleaned the intake manifold the problem was fixed. I had no more check engine incidences and the shake was gone.
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So I have a 2000 Buick, and it generally starts. However, twice now at random times the car hasn't started. It doesn't turn over, but makes a buzzing sound. The strange thing is, that usually after leaving it alone for a few hours, it will start as though there are no problems. I assume it's some kind of electrical issue, but I would love some input on the possible problems with my car.
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Having a problem with the engine cranking over a few times before actually starting. This only happens after the car has been sitting over night. Thought maybe it was a bad battery, but it has been replaced in the last few months.
When I turn the key to start, it tries to fire for up to 3 seconds before actually starting. This only happens on the first start of the day, after that it starts quickly with no problems.
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This is my new Prius C's engine warming up in the morning. The engine shakes once when starting up and I seems to be able to detect a slight knocking sound.
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2006 Subaru Impreza 2.5i ... My vehicle struggles to start. Symptoms present at what seems random and the rest of the time it starts up no problem. I turn the key and the motor turns over a few times without starting then stops turning over yet still sounds as if the ignition and starter are still functioning, just with out success. No grinding or clicking, but the very audible sound of the car trying to start remains, but with out the cyclical turning of the motor. If I continue to keep the key turned for several seconds it sometimes will turn over again and start sluggishly but not always. I replaced the battery and it had no effect.
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This start this morning on my way to work. When I took my foot off the gas I would hear a clicking knocking sound the sound slowed down as the car slowed down. Any time I took my foot of the gas this would happen. Was still there when I hit the break. If i had my foot just barely on the gas it would go way. Its an automatic 2000 Accent 156K miles.
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I have a 2009 Accent. Last year I started to have a hard start issue, very intermittent. It eventually got worse this year.
During the cold, it was never an issue, but during the summer damp or rainy days it occurred quite frequently.
It would turn over, but never start. If I pressed the gas peddle while starting it up, it usually would start the 2nd or 3rd time.
I changed the usual start up components; plugs, ignition coils, cam shaft position sensor, crankshaft sensor, and cleaned the throttle body.
None of those changes worked for the startup. When I removed my throttle body to fully clean it again, I noticed there was an extra air channel into the engine from the TB. Following this, I found the ISCA.
Removing, taking apart, and cleaning the idle speed control actuator seemed to have fixed the issue. It was so caked up with carbon deposit/build up, it couldn't fully rotate.
I used the throttle body cleaner to clean it out and then it began to spin freely (I removed it from the black sensor part first).
Since putting it back altogether, I haven't had a start up issue since.
Here are the notes from the service manual .....
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I got my HSD HR coilovers and they went on great but its like there's a bumping or knocking sound coming from the rear that wasn't there before? They look great and got me as low as I wanted.
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Ok, I've been hearing the strangest noise under my car for awhile now. It sounds for all the world like a drum stick is hanging by a rope, swinging back and forth, and hitting against something solid. It makes 3-4 loud taps and the vibration can be felt through the gas pedal/floorboard. It ONLY happens when pulling out while turning left or right and going over a rough entrance like a rain gutter that bounces the car pretty decent. So whatever it is doesn't start swinging under normal driving. For the life of me I can't imagine what could be that heavy to make noise like that and not be causing any other problems.
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I have an 05 Accent with about 115,000 miles. It is a GLS automatic.
This morning as I was pulling from a stop light about 30 seconds from my office the car was extremely sluggish. I noticed the CEL light blinking and could hear a knocking sound from the engine. I pulled over and found code P0303, cylinder #3 misfire.
I checked the spark plug cable on the coil side it looks ok. I have not been able to check anything else yet as I am at work.
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My car is accent 1.4 A/T 2012, and lately I've been hearing this metallic knocking sounds underneath my car. it happens every time after i drove my car for a longer distance and even on a shorter distance with no minimum running speed, you can hear the metallic knocking sounds whether the engine is on or off. Sometimes it is too loud you don't have to go out from the car you just have to roll the window down to hear it.
I've brought this already to my dealer and told me it was normal but I don't want to accept their answer so i refer it to another hyundai dealer. the second dealer made an adjustments on the muffler and catalytic something and even upgraded the CEU but to no avail and even adjusted my steering preload. BUT I'm still hearing it!! What to do.
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Since about 5000 km, I have had a knocking metal rattling sound happening when I accelerate up a hill or a slight incline. It has happened a few times on flat road as well just more prevalent on the uphill battles. Now I assumed it was jus something loose that was rattling since I installed a cold air intake and had installed hid lights(I thought the ballast was banging on something). I tried and tried to find the rattle but I had no success. I read up on here about other people suffering the same problem and that running higher octane gas would solve it well I tried 89 and it was still there just not as much and I recently started using 91 and its gone haven't heard it at all.
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I have yet another issue with my Hyundai Accent. It seems to me that I hear engine valve knocking. Here tech. details:
- This happens around 1100-2000 rpm.
- The car currently has 11500 KM.
- 3 oil changes so far - using Mobil 1 - 10W30.
- I put in regular gas.
- No mods, only bug guard.
I drive slow - slow acceleration and I noticed sometime ago that there was a knock coming from an engine at about 1400-1700 RPM, however now I can hear it anywhere from 1100 to 2000 rpm. I can hear it very well when I drive along curbs and walls since engine sound bounces off it. I have automatic gear box and therefore I don't know how to test it further ( on manual I would have put some load on the engine by switching into high gear and pressing gas - make engine struggle a bit ). It might be noise from injector but I don't know. Also I don't know if Accent 2010 has self-adjusting valves or not.
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so with the weather turning cooler i have noticed a new noise. i am at 34,000 miles and run synthetic oil ever 4-5k miles.
I hear a rattling/knocking noise when you start engine, not right away, but like after 15 seconds and it lasts about 30 seconds then seems to go away and is quiet again.
Almost sounds like a lifter is tapping due to not getting oil.
I changed the accessory belts a while ago and it did not first make this noise right after but maybe a few days after which coincided going from 80 degree weather down to 40 degree weather.
Could it be an accessory belt being too tight? If so, why wouldn't it make it on startup? I can see it going away as rubber expands as the warms but I would expect it to make the noise from starting till then. Not 15 seconds into running.
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I have '98 VW JETTA Wolfsburg and EVERY time after hard rain (cold OR warm weather), the next day my car is unable to start without giving it gas while turning the key. It only starts after a few tries AND it "bucks" when I give it a bit of the gas pedal early on (within 5-10 minutes) into the drive. After that time, it drives great like always. Just had the fuel system "cleaned" at a local oil change conglomerate, which yielded tons of white smoke out of the tailpipe.
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My hyundai accent has been giving me fits for about 6 months but I didnt think it was a major issue, apparently I am wrong. When it first started the check engine light would come on randomly and go off after a few minutes or even a day. Then it started staying on longer and when it would go off my car would stall. Then when it got cold twice I went out to warm my car before I left and when I came back out to leave it was dead, had to be jump started and while driving the first couple of miles it would die, it always cranked fine but it at lights or stop signs would die. Now it has stopped all together, it turns but wont start. I have a spark and we have tried the cam sensor and crankshaft. The fuel pump wouldn't go out while I was driving would it? or what could it be we are kind of at a loss.
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I'm having problems starting my truck. The second it catches, it just dies right away. It doesn't stay running even if I keep giving it throttle. Although when I did try to start it 5-10 times the other day, one of those times, it started and stayed on for about 5 seconds then died again. What to check? I'm a complete newbie when it comes to this vehicle, but I would consider myself mechanically inclined since I've worked with newer cars and smaller engines before.
Also I don't know if this might be related, but I recently changed the oil & oil filter in the truck (after not having changed it for a long time).... and it was a castrol full synthetic high mileage oil. It ran and shifted a lot better for about a week before this starting problem happened. I checked the oil level and it's still perfect so I know it's not leaking oil or anything like that. Just wanted to throw this in there just in case.
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My son noticed the other day that his 2008 Accent hesitates or seems to hesitate when the A/C is on. We have driven it without the A/C on and the car drives like always, no hesitation feeling.
When the A/C is on it seems like it looses power for a split second. I have driven it too and it seems like when the A/C comes on. We have had this car since new and just gave it to him for college transportation so I know this is not normal.
Did notice that the belts are starting to crack and will replace these next weekend but don't think that is it. Not sure if the A/C compressor is starting to go or something else.
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