Has anyone noticed a sluggish acceleration? My car sometimes is a little jerky when I try to accelerate from a coasting speed. Usually any speed under 40 mph. Any thoughts or comments would be appreciated. The car is an 05 auto. w/70000 miles.

Thank you

 

Sluggish acceleration is the hallmark of our drive-by-wire cars unfortunately. You'll notice on the auto that the shift from 1 to 2 takes quite awhile and can be jerky. There isn't really anything you can do about it.

 

Thank you,

It feels like the car wants to cut out sometimes during acceleration at lower speeds, especially in stop and go traffic. Somewhat of a sluggish response. Is this really from drive-by-wire? Can it be fixed. It only happens once in awhile.

 

Are you in SportShift mode when you try to accelerate? If not are you applying enough throttle during acceleration for the transmission to downshift?

 

Yes, I am applying enough throttle, but some time it feels like its not responding. Almost as if the fuel is being cutoff. Only lasts a second then is smooth. It only happens once in awhile. I really don't know how to explain it. It's just not smooth, a little choppy. Dealer says they will note it. Still have 35000 miles of warranty left.

 

are you sure it's not just the transmission downshifting?

 

Traction problem? Did you notice any VSA lights coming on?

 

Try this: Add a can of injector cleaner to your gas. Then, find an open road where it is safe to get up to 65 MPH, shift into SS mode, and push the throttle to the floorboard and do not upshift until 7,000 RPM's -- in other words, let iVTEC activate. Do this for a total of 6, or more, times.

If you suspect that water could have gotten into your fuel system (a common source is gas stations), then there are chemicals that can help remove small amounts of it.

If no improvement, then have the dealer replace the spark plugs and carefully look for any signs of ignition leakage (arching) while replacing the plugs. Also, check fuel pump pressure.

It is very likely low fuel pressure, plugs that are fouled, water in the fuel, or weak ignition -- often caused by arching or leakage. It could also be value clearances being too large and not allowing the values to open fully -- particularly for a car with 70k miles. However, you would likely hear some value clatter; especially when the engine is cold.

 

OP may also be encountering the fuel cutoff feature, in which (IIRC) if the car is coasting, or decelerating, fuel is not being pumped to the injectors (other than to keep the engine running). I might have this wrong, it's something I read from the techies on this board, and one of the contributing factors to the TSX' good mileage.

There could be a second or sub-second delay if you're coasting and then stomping on the gas. I've gotten in the habit of putting a little pressure on the accelerator before putting a lot and downshifting ("left 'n down, zoom" mode).

 

There is no discernible delay going from the fuel cutoff/coasting mode back to acceleration in my 6mt. There is a noticeable shudder from the off to on throttle transition that comes from the drive by wire throttles lack of delicacy at very low throttle opening states. I suspect the mush of the AT stifles this somewhat compared to the mechanically linked MT. There is a very slight change in engine sound when the fuel cuts off. It will only do it after a second or two of coasting downhill with your foot off the gas. You have to be above a certain RPM too, somewhere around 2000 RPMs.

 

I bet it doesn't do it if you drive in SS mode down-shifting yourself as needed

 

no, it downshifts fine. just a little choppy during acceleration. Only for a split second. Almost a little juttery

 

Could it be the torque convertor?

 

Changed Tranny fluid, but once in a while it feels a little jerky from a rolling start. Almost like there is no throttle responce. No check engine lights come on. Any ideas what it could be?

 

Did you just get the car and hence not used to how it drives, or have you had it a while and it just started doing this?

 

I had it for 3 years. Just started noticing this around 60,000 miles. Dealer says everything checks out fine. Could it be a bad valve adjustment service? I had that done at 60,000.

 

Ah, ok. I was just trying to clear up whether or not it was the jerky drive-by-wire or something else. It seems to be something else since it just started doing it and you're used to the car and how it drives normally.

 

A bad valve adjustment will cause tapping noise if too much gap/clearance between valves and cam. Too tight of a clearance will cause eratic idling.

Try a quick ecu reset. unplug battery for 1000 seconds

 

I have this problem on mine also, it's completely random and happens more commonly when the AC is running. I have the 6 speed manual though

 

Werd!

2004 6-Spd Approx 95K
I need to know what this is. The car is jumpy.
It feels like a timing problem. I upon initial take off, I let the clutch go & for a brief second its bogged down then it scoots...While cruising If I apply a little gas then it goes then it feels like the fuel is cut, then it goes again. If I try to keep it @ a consistant RPMs, it ever so slightly jerks. Like the engine is missing a cylinder. Its not drastic. But its annoying.

Im running Mobile 1 0w-30, honda filter, Stage 1 organic.

What I have done in attempt to correct this problem, Techtron, I changed my spark plugs, swapped out my oil, cleaned my K&N filter charger, Checked the secondary box to primary box tube, (it was upside down) fixed that, & unplugged the battery to reset the ECU. Nothing.
Still sputters/jumps/feels bogged down until I step on it, then I get a smooth acceleration.

Acura wants $112 to diagnose. Im gonna be pissed if I pay that & the engine doesnt throw a code, & even more pissed if the code is something expensive.

 

That is exactly how my car feels. slight jerkiness and a sense that the fuel is getting cut off.

 

That's exactly what goes on sometimes with mine. People riding along would criticize my clutch and i just counter with, "yah, it's this friggin drive-by-wire."

They look at me like im kidding.

 

same here once or twice i have an 08 but my prob is really only the 1st to 2nd shift~ i have an auto

 

I have hit this too with the AV6, from what I can tell it is the DBW and ECU where for almost a split second from when you mash the throttle and the TB opens before the ECU regonizies it and reacts.

 

Is this normal. It does not happen all the time. I have an automatic. I never noticed it until the car hit 60k and I had a valve adjustment. Can it be fixed?

It's the jerky non-smooth acceleration from a rolling start that gets annoying.

 

I too am still working on pin pointing the exact cause myself, Honda has been absolutly no help. Right now I am trying a new MAP sensor to see if maybe it is the map sensor that sticks a little and is not reporting to the ecu correct data immediatly. So far 300 miles without a re-occurance.

 

What's a MAP sensor? How much does it cost? Easy to install?

Thanks

 

MAP (Manifold Absolute Pressure) sensor,mesures the amount of vacume in the manifold and is the primary source of engine load data for the ECU telling it that it needs to give more fuel, ect...

It is right on top of the throttle body and is held on by one screw, most online places have them for around $55.

 

If my MAP sensor was bad, wouldn't the check engine light come on?

 

Only if it was dead, this is where it is just "lazy or sticky or slow to respond".

 

Thank you

 

I going through the same thing right now, I’m going to try the fuel injector cleaner, see how it goes. Did you find out the fix yet

 

Long shot but give the procedure at https://acurazine.com/how-tos/a/acur...letely%20reset. a try.

 

Damn I remember this thread. So back in 2009 I replaced the T.P.S. Throttle positioning sensor to get rid of this problem. If I recall correctly it resides close to to the firewall on the passenger side, was 156.00 USD (Back then) and took about a 1/2 and hour to install. Problem Solved