Passat (B5) :: Rough Acceleration After Warming Up
Sep 15, 2009
Car was working just fine. i changed the oil. after this, i have this problem:
Engine cold or go at freeway speeds = no problems
Engine hot and stop and go traffic = sometimes the engine will not rev above 1000rpm. when stepping on the gas, i will get a rough idle but engine would not go over 1000rpm.
I can shut off the car and wait some time, then the car will work again for a while.
No check engine light, no error codes, nothing .....
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Basically, when driving shortly after turning on the car (when the engine is still warming up) I often experience a 'shot' of acceleration despite not further depressing the accelerator. In other words, I'll be driving along smoothly and suddenly the car will speed up slightly by itself without me having done anything. This only occurs when the HSI is past the middle (i.e. when the engine is powering the car) and when the car has recently been switched on. It's almost as if the sensor that detects my acceleration is re-calibrating itself while I'm driving, increasing the input to the engine.
The first time it happened it was a bit of a shock and I was a little scared, however I'm used to it by now and can anticipate it happening (however it doesn't happen 100% of the time). It's nothing too serious - it probably only accelerates a couple of KMs above what I'm actually doing but still is a bit of a worry. I'll be taking it in for a service shortly and seeing what they say about.
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This morning I went to start my car and while the engine was warming up (it's carbureted, not fuel injected) I heard a strange sound that I can only describe as sort of a "gulp" or something. As I was driving to the doctor, at one point I was going up a slight hill so I went to accelerate and the RPMs reved up but I didn't go any faster than I was going, which was about 30-35mph. What's going on here? 1987 Honda Accord LX....
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I recently purchased a 1999 6.8L. Runs great when cold but after warming up the idle gets rough. Truck has new plugs and coil packs and fuel filter. Checked the fuel pressure and the idle is right at 30 psi. I read that the good pressure range is 30 to 45 psi. Is 30 psi acceptable or should I replace fuel pump or regulator? Any next step to solving my idle woes.
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I have a 2007 Passat wagon 4 motion V6 and what the problem is I am getting a rough shift between 3-4 gear sometimes, usually on a slow acceleration. I have had the valve body replaced which worked for a couple of months until the problem returned. I then had the transmission replaced which worked a little but the rough shifting is still present at times. The car still has warranty and not even the dealership knows what to do?
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Every morning 1.8T idles high when warming up usually takes a minute or two to idle down. When your running late kind of annoying when I drive before idle goes down to normal brakes seem way to responsive and jerky...
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I recently bought a 1992 Celica GT with 250k miles on it. It has a rough idle and a couple other things that may or may not be stemming from the same thing that's causing the rough idle
Like I said, it has a rough idle and there is a bit of jerking sometimes during acceleration. The exhaust makes sort of a "put-put-put" or "chirping" sound at lower RPMs and the frequency of the sound corresponds to the engine RPM. I do know of a couple things that could be causing the rough idle and maybe even the jerking, but I'm not sure about the sound from the exhaust.
The cooling fans are hard wired to the ignition so they run constantly, so when it's cold out like it is right now it takes forever for the engine to warm up. Is there a switch somewhere that they are supposed to be wired through? Where would that be? Also, the previous owner did kind of a hack job of putting on a cold air intake and I think I may be missing some sensors, especially because it seems to burn more fuel than it should. What sensors are located on the air intake, or are there even some in the stock airbox itself? And would this possibly be contributing to the rough idle and the jerking?
Also, I do get some vibrations when stopped at idle so I think I may want to replace the motor mounts.
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I have a 2009 Sante Fe, it has about 96000KM on it. It is a 3.3 engine AWD.
I find that when I accelerate the thing kind of feels rough. It is very subtle. Like you can almost miss it if I wasn't being so picky. But I can definitely feel something there. What this would be.
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I've got a Sonata NF 3.3L I bought for my first car. Bought the car second hand with 119,000km's. Runs really well but in the last few months there has been a rough sound on acceleration. Sort of like a ticking noise. Doesn't matter if it's warmed up or not. At cruise speeds you can't hear it. What it could be? Ran some injector cleaner through it to no avail.
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On my 94 Honda Del Sol. When I start up and the engine is cold, it runs fine. Soon, after it warms up, low rpm acceleration is rough until it hits about 2500 rpm. then it gets smooth. If I accelerate slowly during this period, it can be ok. If i open it up at higher rpm., it runs great.
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About 2 months ago, the acceleration became very rough and grinding. The accelerator pedal used to feel smooth, but now feels as if I am driving over a rocky mountain path.
I upgraded from 87 - 91 octane (California), and while it did provide a very slight improvement in acceleration, the underlying issues remain.
I thought it might be the axle, but I read on this board that axle problems create a chirping noise, but I have not noticed any.
My Solara does not have any of the following issues:
1. No starting problems
2. Does not stall
3. Idle is fine (although more rough)
2004 Camry Solara....
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Woke up to go to work and it started up with a rough idle, got a block down the road and it had a slight miss under acceleration. Guessing its a bad coil, I've got a spare featured I'd play I I mini miny moe when I get home unless.
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I have some major problems with my explorer. The idle is rough and accelerating is rough also. If I nearly put it to the floor it almost seems like it studders the power. it will feel great for a second that feels like it's less power for a second then more and less and more and less. When I'm sitting at idle, it will idle fine then after a minute or so it will bog way down and shake the whole vehicle. when that happens I give it some gas and it comes back to normal idle then it does it again after sitting for another minute. I've replaced spark plugs, wires, alternator, oil change and some tires. I've been told by many mechanics it could be the IAC Valve or the fuel pump or the fuel filter or a vacuum leak.
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2007 Sonata V6. He's spent many hours and a good chunk of change at the dealership trying to get it fixed and nothing has worked yet. They honestly have no clue whats wrong which kinda scares me.
First off here is his problem. Occasionally when he starts the car it will idle very rough and struggles to accelerate to 30-40mph. When this happens he pulls over and shuts the car off for a few minutes then it will run fine again. When all of this happens there is no CEL or any light at all that flashes or comes on the dash.
Here is a list of things that have been replaced
Fuel pump
Throttle position sensor
Crank sensor
Plugs, wires and coil pack
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My 2011 Sonata 2.4L GDI has already 76k miles. Spark plugs were replaced around 75K miles, Air filter was replaced. Fuel treatment was done several time since ownership, Intake CRC for GDI was used once about 2K miles ago. The car is doing good until recently. When I accelerate the car acceleration goes uneven. It is not like hesitating but you feel like the car is taking it in steps. Sometimes the first run in the morning, the car idle feels a little bit rough but that's only in the morning. It has been like that for a month now. What do you think it can be? No Check engine light, no pending codes and nothing major except that. I really suspect a bad upstream oxygen sensor (Air fuel ratio sensor). What do you think?
A look through the intake shows a very clean intake. No signs for any carbon deposit. A Hyundai dealer checked the car and told me there is nothing to worry about. Just told me to buy more Hyundai fuel treatment (AKA Chevron Techron) which was done and still I feel uneven acceleration.
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Firstly, my car is a 2001 with a 1.8T, 5 speed manual. It has APR's 93 with the mode-switching software, a FMIC, a short ram air intake, the SAI delete and the original DV (used to be a Forge 007). I bought the car in 2008 and it didn't have this problem until the following winter, sold it in 2012 and recently bought it back from the guy I sold it to.
My car will start and idle great, and accelerate through first gear without problem. In second and third gear, when it hits around 3000 RPM, it just suddenly starts to sputter and run like crap and not get any kind of boost. Fourth and fifth gear, I can run it until it peaks and it'll never miss a beat. It only does this when it gets cold outside (sub-30 degrees) and is perfectly fine the other nine months out of the year. I usually don't drive it in the winter if it's avoidable, but I have to travel a lot this year and would like to drive it instead of my truck.
In the past few years/15K miles, I've replaced:
- All four coilpacks
- All new spark plugs
- New coilpack harnesses
- Catalytic Converter
- Throttle body (twice)
- Diverter valve (back to stock, other owner did it)
- SAI delete (other owner did it)
- Fuel Filter
- O2 sensor
- ECU (the factory one got shorted and had to be replaced back in '08)
I've also gone through and checked every vacuum line and can't find any leaks (including spray testing). My CEL is on due to the SAI delete. I've tried it in both the stock and APR mode and it doesn't make a difference.
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I have encountered a problem with my car engine. I noticed the car was not putting out enough power. When I press on the gas pedal aka accelerator the car drives real slow or sluggish; it seems like there's something clogged. I recently replaced the alternator which was draining the car battery. Since then the car starts up without any problem. I assumed its the EGR valve. The original EGR valve was quite carboned up but the used one from the junk yard didn't do much justice to the problem.
Additionally, the car is rough idling which I believe was due to bad gasoline.
Catalytic converter was struck by curb and heat shield was damage. Everything seems to be intact!
2000 Pontiac Grand Prix SE 136km+
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While driving on the freeway my car started to surge as if it was starving in fuel. I had to press more gas to go the same speed. My gas tank was at a 1/4 full so I pulled into the gas station to fill in gas. As I was leaving my car could not accelerate while pressing the gas pedal. I could floor the gas and it would go only five miles an hour! The engine temp was okay, no engine lights, and no weird smells. I was fortunate to be close to home and slowly made it letting cars pass me on the side. I called the road side service who towed my car to my dealer. They checked for codes, ran fuel injector cleaner twice through the system, checked the fuel pump, and the pressure on the fuel system, no problems. The third day they gave me a Sonata for a loaner and I allowed the service manager to drive my car to see if the problem reappeared. No problems found and I picked up my car today. The problem hasn't reappeared yet but I am keeping track of any rough acceleration or idle.
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So, I have a 2016 Elantra SE Auto w/ 26k miles, I have 1k miles life until my next oil change.
Since about Saturday, whenever I accelerate, around 3k RPM - 4k RPM it's running/ sounding really rough! Not sure what's causing that, I checked my air filter earlier that day & put it right back in, also put in some HID lights in. I thought maybe the containment cover or gasket around the filter wasn't seeded properly, but everything checks out. I'm pretty car savy, so I know this isn't normal for brand new cars. Doesn't seem like it's loosing power, I still get pretty quick throttle response when I really gas it!
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I have a 2008 Accent SE and I'm having some issues... The car was driving fine the other day all the sudden check engine light came on started flashing then and just stayed on. This happen before and the car was under warranty so the dealership fixed it but now it ran out and it's happening again. Anyway the car is running very rough at idle like the car shakes and acts like it doesn't want to run. Also when driving it honestly feels like the car has no power or acceleration what so ever. I replaced the air filter with a brand new K&N filter, I also changed the spark plugs today. I put NGK's in and the problem is still the same. I had it hooked to a code reader and it said I had a misfire in cylinder 2. I thought the plugs would have fixed it but I guess not.
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I'm an Accent 2000 gs owner and since a few days i had this problem. It has a bad idle and looks like it will stall... need to give some gas to stay alive.
Bad acceleration too, it misses some gas. (puffing, rumbling, shaking a bit). After accel, it's ok until the next red light.
Now I can't even drive cause it's worse. (too difficult to accelerate). Is it a sensor?
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