design flaw when accelerating?

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Old Sep 13, 2008 | 03:10 PM
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design flaw when accelerating?

Only applies to autos. When accelerating from a dead stop, there is a slight LUGGING vibration at the initial accelerating. Anyone else notice this?

From what i know, this lugging is extremely bad for the engine as it will cause scarring on the cylinder walls and piston rings which will lead to oil consumption.

It might not even be engine lugging, could be something else but that is what i suspect.
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Old Sep 13, 2008 | 04:02 PM
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From: Somewhere between 70 and 125 mph
I haven't noticed anything like this on mine. How many TSX' have you experienced this with?
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Old Sep 13, 2008 | 05:13 PM
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I don't have that problem. I have an 06 AT.
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Old Sep 13, 2008 | 06:52 PM
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ive noticed this since i got mine....06tsx.

i dont think you guys noticed it before, but if you go out and drive it a bit and payed closer attention youll notice it.
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Old Sep 13, 2008 | 07:06 PM
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Lightbulb

Its probably the auto tranny down shifting for you, plus the DBW throttle system.
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Old Sep 13, 2008 | 07:07 PM
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its already set in 1st gear ready to accelerate.......
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Old Sep 13, 2008 | 09:06 PM
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I have noticed something similar on all auto TSXs I have been in, including ours. I have always attributed this to the slightly awkward (IMO) DBW.

When the '09 first came out, I saw a homemade video on YouTube where two salesman were driving it for the first time. The one said the same thing while he was driving it, so I guess this wasn't corrected in the new model.
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Old Sep 13, 2008 | 09:22 PM
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feature on all acura's since 2006, the ECU limits power to help prevent torque steer. Its the car trying to stop what you are doing to prevent the TS.
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Old Sep 13, 2008 | 09:30 PM
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i'm not sure if it's extremely bad for ur engine as mine has 70k miles and still gets great mileage with an excellent condition engine. and there are alot of tsx owners with more miles and no problems with their engines.
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Old Sep 13, 2008 | 10:37 PM
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From: Somewhere between 70 and 125 mph
Originally Posted by ck123
... i dont think you guys noticed it before, but if you go out and drive it a bit and payed closer attention youll notice it.
I guess you expert drivers need to instruct us old fogies in exactly how to duplicate this. I know what engine lugging is (it's something you get to know and recognize a lot in a Jeep), and did it a lot when I was learning stick in my 1977 MGB.
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Old Sep 13, 2008 | 11:22 PM
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I never experienced the lugging problem on my 05AT.

Are you sure it's the engine lugging? Or your front tires fighter for traction before it grips?
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Old Sep 13, 2008 | 11:39 PM
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Originally Posted by ESHBG
I have noticed something similar on all auto TSXs I have been in, including ours. I have always attributed this to the slightly awkward (IMO) DBW.

When the '09 first came out, I saw a homemade video on YouTube where two salesman were driving it for the first time. The one said the same thing while he was driving it, so I guess this wasn't corrected in the new model.
Finally someone who knows what im talkin gabout.
Originally Posted by davidspalding
I guess you expert drivers need to instruct us old fogies in exactly how to duplicate this. I know what engine lugging is (it's something you get to know and recognize a lot in a Jeep), and did it a lot when I was learning stick in my 1977 MGB.

when you auto drivers go out to drive tomorrow, take notice in the INITIAL Acceleration(when rpms climbs from 600-1200) youll feel/hear it too.

report back tomorrow please thanks

Originally Posted by chuson
I never experienced the lugging problem on my 05AT.

Are you sure it's the engine lugging? Or your front tires fighter for traction before it grips?

go for a 5 min drive and pay close attention! a modest acceleration will show it

Last edited by ck123; Sep 13, 2008 at 11:42 PM.
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Old Sep 13, 2008 | 11:45 PM
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Originally Posted by csmeance
feature on all acura's since 2006, the ECU limits power to help prevent torque steer. Its the car trying to stop what you are doing to prevent the TS.
do you have a link to further describe this?
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Old Sep 14, 2008 | 12:12 AM
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I barely even stay under 1200 rpm for more than a fraction of a second. You must accelerate slow as hell or something. If you are going really slow in first gear the throttle is really touchy because of the DBW. It jerks a lot if you are going slow and just lift off the gas and then push back on the gas again, even just a little bit. But that is only when I am going less than 10 mph. When I am accelerating I don't go that slow though.
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Old Sep 14, 2008 | 07:26 PM
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I do quite a bit of stop and go.

I have noticed it as well. I also have the vibration at idle when it's cold and also when the AC is on.
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Old Sep 14, 2008 | 07:47 PM
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Originally Posted by ck123
ive noticed this since i got mine....06tsx.

i dont think you guys noticed it before, but if you go out and drive it a bit and payed closer attention youll notice it.
Have you noticed this for two years, and are just now posting, or did you just acquire an 06 used? I've had my 06 for about 18 months and I'm in stop and go quite a bit - never noticed anything but I'll pay closer attention tomorrow. If it's used, how certain are you of the maintenance?
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Old Sep 14, 2008 | 07:56 PM
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Originally Posted by csmeance
feature on all acura's since 2006, the ECU limits power to help prevent torque steer. Its the car trying to stop what you are doing to prevent the TS.
Does turning the traction control off eliminate this?
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Old Sep 14, 2008 | 09:05 PM
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Originally Posted by nkeller099
I do quite a bit of stop and go.

I have noticed it as well. I also have the vibration at idle when it's cold and also when the AC is on.
Normal.

Originally Posted by ck123


when you auto drivers go out to drive tomorrow, take notice in the INITIAL Acceleration(when rpms climbs from 600-1200) youll feel/hear it too.

report back tomorrow please thanks
Hm, how should I put it.

When I'm idling, it rests @ 750rpm or above depends on any heavy consumption electronic device is running. Once I step on the gas in 1st gear, fast or slow, mine has less than like 0.whatever sec below 1200rpm, simply like others mentioned, 1st gear is very touchy and it just go.

Last edited by chuson; Sep 14, 2008 at 09:10 PM.
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Old Sep 14, 2008 | 09:44 PM
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bought the car brand new, it has 16.xk miles on it and has gone through 3 or 4 oil changes, nothing else.

1louder...i noticed it before but didnt bother me now until the other day when i was thinking of possible negative effects this had on the car. ill ask the stealership next time its in for an oil change.
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Old Sep 14, 2008 | 09:49 PM
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Originally Posted by ck123
bought the car brand new, it has 16.xk miles on it and has gone through 3 or 4 oil changes, nothing else.

1louder...i noticed it before but didnt bother me now until the other day when i was thinking of possible negative effects this had on the car. ill ask the stealership next time its in for an oil change.
Since it's under warranty, might as well. Can't hurt!
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Old Sep 15, 2008 | 03:28 PM
  #21  
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From: Somewhere between 70 and 125 mph
Originally Posted by ck123
... when you auto drivers go out to drive tomorrow, take notice in the INITIAL Acceleration(when rpms climbs from 600-1200) youll feel/hear it too.

report back tomorrow please thanks

go for a 5 min drive and pay close attention! a modest acceleration will show it
I did. I did several permutations of letting off the brake from a complete stop, on slight inclines and level ground, cold engine, hot engine, a/c off, a/c on, etc., for the past week Guess what? Only once did I notice the RPMs drop from 600 rather than stay steady ... and only once did I feel anything that could be confused for engine lugging (but wasnt, I think it was the friction point engagement).

It happened when the car was cold, with the a/c feverishly cooling down a hot interior.

There's a ramp at my work parking garage I can try this on again (without pissing off traffic) this afternoon. I'll post if I see it happening more. But....

I would show this to the dealer service mgr. If you can make it do this every time, I'd say there's something wrong with your vehicle, rather than a widespread design issue. Just based on the car I've been driving in all kinds of traffic for 14 months.
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Old Sep 15, 2008 | 08:37 PM
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I went to the dealership today, instead of having them inspect it, i asked a salesman if i could test drive a 06 tsx that was on their lot. Surely enough, this 06 tsx did it as well, the salesman noticed it too.

Later i asked him if i could test an 09 tsx and he said sure, the 09 tsx did it as well but wasnt as bad.
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Old Sep 16, 2008 | 11:35 AM
  #23  
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From: Somewhere between 70 and 125 mph
You're going to have to give me explicit instructions on how to duplicate this. I did some slow starts from a full stop on the parking garage ramp, and nada. The revs kept stable while the AT started holding the car.
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Old Sep 16, 2008 | 01:30 PM
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all i notice is the horrendous rev hang from 1st to 2nd gear if i'm not in sportshift mode. otherwise, i don't think in experience this on my AT07.
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Old Sep 16, 2008 | 04:11 PM
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I tried this AM and got nothing. I did notice my car idling at 800 RPM, but as previously mentioned, the minute my right foot hits the petal, it's at 1200+. Nothing but smooth.
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Old Sep 17, 2008 | 07:24 PM
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i think I am feeling what you are referring too. I find that acceleration is a little rough (ie feel a vibration) when accelerating in any gear below 2300RPM (not to mention a lack of power).Anything after 2300RPM is really smooth.
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Old Sep 18, 2008 | 05:22 PM
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From: Somewhere between 70 and 125 mph
I don't think we're talking about vibrations 1000 < x < 2300 RPM ... I think he's talking about "lugging" as a result of the engine being momentarily dragged below the minimum idle speed during initial, first gear acceleration.

I noticed during my little tests that when the car is cold, the full-stop idle is between 900 and 1100, and tapping the gas raises it. No problem there. But after 20 minutes of driving or more, I noticed my full-stop idle was 700, maybe dipping to 650. Only once did I see it maybe dip low, but that could've been the a/c kicking on.

Don't know if the idle-set is mechanical (like in my Jeep's i6-258 engine), or ECU, but perhaps what OP is talking about occurs after lots of driving and the engine is fully warmed up.
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