Accent LC (2000-05) :: Running Rough When Cold But Only When Accelerating
Dec 15, 2014
My 2000 Accent 1.3 has developed a problem recently: starts fine and revs freely and smoothly when parked. When I pull away it will get very rough like it's firing on only 2 cylinders or so, at certain points during the rev range rather than continuously. Very juddery.
After a minute or so, before the engine temp is even up to normal operating temp (according to the dial) it runs perfectly. When I start it up later the same day it's fine. It only happens the first time in a day that I use it. The more days I go without driving it the worse it is.
In the last couple of years I've changed spark plugs (always in good condition when I replace them), HT leads, coil pack, a lamda sensor (the first after the exhaust downpipe) and a fuel pump and filter.
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My 2.0 recently had some problems with the coil pack so I replaced it. Now my car hits a "flat spot" when accelerating around 2000 RPM and then another around 2600 RPM. If I am in 3rd gear going about 20MPH and I press the gas about 25-30% it sort of shakes and won't accelerate and when I take my foot off the gas and slowly ease the pedal down it accelerates fine.
My car also runs pretty rough at a cold idle(misfires). When I press the gas it sounds smooth until it gets back to idle. At any temp my car runs really rough with the A/C on. I also hear a rattle/Buzz around my relay panel when the A/C is on. My car is a 1999 2.0 AEG. I don't have VAG-COM just a generic scanner and the last codes I got were:
P0134
P0135
P0141
I replaced both O2 sensors and the beginning of this year and those codes came back right after I did them. I will scan tomorrow and post any new codes.
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A few weeks ago my car was running perfectly fine, i filled it up with fuel and then it started running a bit rough. Would drive ok but could feel it surging and if i backed off on the accelerator it would try stall.Also the fumes in the car were a lot stronger than usual. Got home and it stalled, started it up and was idling rough and blowing black smoke :/ no engine light has come on though. I did the typical thing and googled possibilities, the mojority said that it was the purge control valve so i replaced that with a new elantra one (part numbers were the same) and its still running rough We are now thinking it could be the oxygen sensor? Have checked vacuum lines and stuff for air leaks and cant find any. Unplugged the oxygen sensor while car was running and it made no difference at all.. If the oxygen sensor was working properly it would of affected how the car was running, right?
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I have a 2000 LC that has a few symptoms - intermittent misfire/running rough at these times it has:
dark smoke
uses 3 times the fuel
loss of power (to normal)
will pick up revs slow without running rough and runs normal at high revs.
dies misses and then picks up revs slowly when accelerator is pushed fast to the floor from idle.
Hyundai mechanics checked computer and it coded change spark plug leads this did not fix the problem, and have no idea.
About 6 months ago the car was doing the intermittent thing when it died and liquid was heard splashing on the ground. I found the main petrol line connecting to the pump had come completely off. After replacing all problems ceased and the car ran perfect with full power etc.
I've checked the fuel lines none appear to be leaking etc.
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I have a 2000 Honda Accord Ex that began to run very rough when cold. After warming up it seemed fine. Now the car runs rough whether hot or cold. The car only has 23,000 miles on it. The cap, rotor, and wires all appear to be good.
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My daughter has a 2000 accent , SOHC 12V, I think it's the 1.5L.. It will not stay running when the engine is cold...........after it warms up, or if it sits in the hot sun it's fine................it has 166K .
She said she took it to an auto parts store and had the engine code read, p1123 came up.....
Code P1123 : Long term fuel trim, at idle - mixture too rich..
What do you think this is caused by................ the inlet air temp sensor? I was told someone just replaced the air max flow sensor, that don't sound correct to me, but that's what they called it....probably the MAF sensor....
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Owning a Hyundai. I have a problem and it seems to be pretty common but haven't gotten anywhere with it yet. Last week my 2004 accent 1.6 manual transmission started running rough. It was idling higher than normal and while driving would not go past a certain rpm (about 2500 if I had to guess,no tach). On the way home from work it was running this way and then started badly misfiring and shut off, when attempted to restart it would not. I pulled the codes with a scanner and got p2400, p0562, and p0121. I charged the battery and replaced the throttle position sensor, still won't start. I can hear the fuel pump kicking on when I turn on the ignition. Also found the ecu 1 fuse blown, replaced it and continued to attempt to start with no luck, fuse was blown again. Like I said I haven't owned the car long and I don't know much about it. I am not sure where to go from here and I don't know how all these symptoms are tied together.
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I have had some slight rough running with a cold engine and stumble <2000rpm. Finally it tripped a CEL which was read as a misfire code.
The mechanic swapped the coil and plug(recent) and no change. He did a compression test and air blew out the exhaust. So.......the car needs a valve job which entails motor removal and fixing the head and reinstall. He rough estimates this at $2000 and rate is $65/hr.
He mentioned looking at pistons and may be a bit more if rough.
This car well maintained (170,000 miles 2005 Legacy turbo wagon with manual)...
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I have a 1998 F150 4.6 2wd regular cab with 255,000 miles on it. Lately it has had some problems. The first is that it will run really rough when under a load, meaning when I step on the gas. It runs smooth at idle and at cruise but when I step on the accelerator it bogs way down and almost shuts off. I have changed the spark plugs, spark plug wires, coil packs and fuel filter. Now I'm thinking maybe fuel pump?
The other issue is that when the truck is having to work a little harder (i.e. pulling a trailer or running in the summer with the AC on) it will start to run hot. I have changed the thermostat, flushed the coolant, cleaned out the radiator, etc. and it still does it. Could both of my issues be related to a fuel problem??
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My 1990 Chevy Silverado with 5.0 liter, 45k miles has started a problem that the guys in my diesel repair shop don't know what to do. Last week it started to run rough, hesitating and lurching and not accelerating smoothly. It idles fine, or pretty well, but just doesn't run smoothly with any kind of acceleration. I drive it back and forth to work just 1.5 miles during the week. I took it on vacation a week before, so it's not from lack of long trips, it ran fine.
A guy at my diesel repair shop put it on his Genesis scope and all it would code is the O2 sensor showed lean, but we could see it switching from rich to lean and so on. I thought vacuum leak, but couldn't find one. PCV valve is good. EGR valve is ok. I changed the fuel filter yesterday and thought it ran a little better, but now has gone back to the rough running. What I can do myself to diagnose this? I do have all the tools and shop.
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Noticed this to be a problem with our older 2011 Accent, now with the 2012 Accent.
The car has a rough idle usually in mornings, it seems like it is going to stall at stops, it also has a tough time accelerating.
The computer scan does not show there is anything wrong until the problem becomes worse.
This is what I have discovered through the 2011 Accent. Car will stall at stops. Very inconvenient in rush hour traffic. Until they replace the Crankshaft Point Censor, the problem would not go away.
I would insist on looking at this rather than replacing sparkplugs or having any other service performed if one is experiencing these same symptoms. The good thing is it is under warranty.
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Lately my 2001 F250 5.4 engine is running rough when I am accelerating or keeping it certain speed. It feels like it is jerking. Like if the truck lost power for a second. This will go on for few minutes. Where to start to trouble shoot.
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My 2005 Accent began making an odd clicking sound about two years ago when I would decrease my speed, not using the brakes. It wasn't loud, just annoying. It went on for some time until my car went into the shop to have the alternator replaced. I explained the noise to the mechanic and they checked it out. They explained they added some type of cleaning fluid somewhere under the hood, and the sound was gone. I was thrilled.
Last year, the sound returned again. Annoyed, I began saving to bring it in to the shop again. In Feb 2013, I had my timing belt and water pump replaced because my mileage of course called for it. The mechanic said he could not hear the clicking sound I was reporting (I really didn't see how.)
Two months later in April, my car decided to die on me and after 5 months I just recently got it up and running again. My differential and transmission were both completely rebuilt. Also, my CV axles have both been replaced. Now that I have my car back, the clicking sound is louder than before and also now happens when I accelerate as well. The faster I go, the faster the clicking gets until it eventually stops. When I slow down, the clicking starts again until I hit my brakes.
I want to take my car and get this noise silenced once and for all since they didn't hear it when my transmission was done last month. What fluid may have been added to what part 2 years ago when this was handled initially?
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I have a 2008 Accent 1.6L automatic that is running very rough when it accelerates. First of all there was some engine check light, I got the codes and it was a Cylinder misfire. Then I checked the following:
1.- Spark plugs (replaced them same NGK but I didn't gaped them, same result)
2.- Fuel injectors (removed them, cleaned them and installed in different order, same result)
3.- IGN coils (measure resistance, swap them in different places, same result)
4.- Checked most of the sensors including TPS, Crankshaft PS, MAF, Camshaft PS and nothing.
5.- I checked for any type of vacuum leak and I couldn't find one
After all that troubleshooting I cleaned the codes, started the car again and I have the same problem with no check engine lights on except that sometimes I would get a "running rich" code.
I also noticed that the air intake is LOUD like a performance air intake, is that something normal on the accent? (I checked the air filter and its not clogged FYI). I could only think of:
Gap spark plugs to .035
check timing belt
check fuel filter (I don't think so)
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Car just stopped accelerating on highway. It starts again after about 10 minutes. Also the wheel gets stiff when it stops accelerating. What could be wrong?
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I need diagnosing a problem on my 2002 Hyundai Accent LC. When I accelerate with the aircon on the engine stops accelerating at high RPM and when I accelerate from a stand still the engine hesitates and jerks! I don't understand what the problem may be coz it works perfectly after a cold start but after it warms it starts doing that.
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We have been having issues with my son's 97 Sierra running rough when it is cold/damp. It feels like the engine is missing.
Today, which is warm and dry, it started running really bad and it was all he could do to limp it home. It seemed like it wanted to idle fine but when he tried to rev it up the tach would start jumping and it seemed like it was missing.
Could this be a bad cap/rotor? The engine has 200,000 miles and we've never changed the cap/rotor. I changed the plugs/wires probably 100,000 miles ago.
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The check engine light came on after cleaning the engine and the engine runs rough. Where to look. 2007 Hyundai Accord.
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I have a 2005 accent with a 5 speed, it has about 80,000km on it.... mainly city driving. Lately, once the car is up to temp. as I pull away from a stop the car makes a loud noise and I really need to feather the clutch out. The noise continues after shifting into second gear ,but no other gears. Thus happens under normal acceleration. If I pull away extremely slow the noise isn't there. If I don't feather the clutch the car lurches like I'm just 'dumping' the clutch and driving like someone who is just learning to drive. Sometimes there is also a whining noise in second gear if I am accelerating at a normal pace. Where I should start looking? I am assuming it's the clutch due to the fact that it happens after everything warms up.
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I have a 1990 3.1L, multiport fuel injection (NOT sequential FI), which runs very well most of the time. However, when I cold start it runs rough (misfire) for about 1 minute (no throttle) or until acclerated. The is no misfire when running normal, but it might be running a little rough when stopped at a traffic light (in Drive, foot on brake).
I put new plugs and wires on, but it did not affect this problem.
I am not using coolant, or oil, the plugs that were removed were somewhat worn, enough that I expected to notice a difference after they were changed.
I have not yet (1) cleaned the MAF, (2) checked carefully for vacuum leaks, (3) checked for leaking injectors.
Since this is a 1990, OBDI, I can't say which cylinder is misfiring or how the fuel trims look etc.
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About a week ago I purchased a new K&N air filter for my '09 GLI (6spd stick & all factory options with 55,000k on the odometer). Outwardly the vehicle seemed to run better (although a new clean air filter of any type will make a vehicle run better) however, 2 days later I noticed that the engine seems to chug a little when it was cold. Not missing like a plug wire off but a chug where it surges forward then holds back continually until the engine warms up. This persists today. I've also noticed a little bit of a rough idle. I've re-inspected my installation and nothing seems to have come loose and the filter fits perfectly.
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