Throttle037

So I recently bought an 08 TL Type S 6MT. But this past week I have been experiencing some studdering during hard acceleration. Kind of like the car bucks then throws you back in the seat. Anyone heard of this? Any resolutions? I've searched but can't find anything on it for manuals.

kibbles906

iTrader: (14)

sounds like a misfire...any check engine lights? i would check the spark plugs make sure they look good. if they are good then most likely an ignition coil

guitarplayer16

iTrader: (8)

Interested - I've had this happen too.

Not sure if I've had it happen since changing the pressure switches last week, though.

JTS97Z28

iTrader: (4)

There are quite a few threads regarding hesitating, surging, studdering TL's. Unfortunatly to the best of my knowledge no one has a fix for it. I had TWO 08 Type S's that both had a surging feeling while accelerating that was only really noticeable in hot weather. It would never put you back in your seat, but was during all acceleration even light. It just felt like a loss of HP, then it would kick it back in. On my automatic 08 Type S during the hot summer months it felt like I easily lost 50hp sometimes. Then other times it felt strong again with no difference in conditions. I just assume it was computer related and something I couldnt fix. So I sold those and now have a smooth as glass 07 6mt. I cant explain it.
Not sure if these are the same problems, but if you search hestitation, surging, studdering you will find a LOT of info.

erdoc48

Hopefully not a stupid response- would a dirty throttle body cause such a problem assuming there are no codes? Mine was pretty carbonized in the past- it had a minor delay at acceleration from a standstill, but once it was cleaned, it ran normally again (maybe placebo effect?).

justnspace

iTrader: (1)

^the throttle body would have to be encrusted with carbon to effect air flow.

a little carbon deposit, as what is found in most throttle bodies will not impede air flow that much to cause stuttering.

on the other hand, one can always clean the throttle body and the EGR valve to ensure proper flow!

Throttle037

Aye there is a lot of info out there but most experience w/ automatic transmissions. Its almost like the motor just runs outta juice, it stops accelerating and kind of tops out for a second then gets a second wind and starts accelerating again.

Throttle037

I did have a check engine light the other day, P0171 and P0174 I think. However the light went away after being on for one day, still monitoring that. I'm trying to remember if it ever happened before the CEL or not.

JTS97Z28

iTrader: (4)

So did you look up what those codes are? That would have been my first step as it certainly could be related.

Throttle037

Yea, running lean. Unless the TL has some sort of safety mechanism, I don't see how this would cause the engine to studder, however anything is possible. The light has since gone away and I continually check for the codes. I think it may have somethin to do w/ the swap to winter gas?

JTS97Z28

iTrader: (4)

Ehh I doubt it. Never once experienced any issues due to switching to winter blend fuels. Plus, we don't even know when that happens for all we know you could have been running winter blend fuel for weeks, or maybe they haven't even switched yet who knows. Wish I had more info about the studder, all I know is that I swapped literally almost everything with exception of the ECM (which I actually even tried but wouldn't work in a different VIN lol). Nothing fixed it, so I sold it and bought another haha

Throttle037

Was the one you sold by chance a type s w/ 70 something thousand miles? Lmao.

JTS97Z28

iTrader: (4)

Ummm I can't remember the mileage. It was an 08 NBP/ebony 6mt in the Chicago area, but I honestly can't recall the mileage. I sold it to a local guy that loved it. The surging was minor, but something I noticed and it bothered me. The average person may have not even noticed it, but I did. It was at Acura on multiple occasions and they said the car is functioning correctly.

kibbles906

iTrader: (14)

looks likes it common and theres a service bulletin

look at this thread.. https://acurazine.com/forums/3g-tl-2004-2008-93/tech-service-bulletin-mil-comes-dtc-p0171-p0174-813570/

Throttle037

Aye, I've looked at that. I was going to have the tsb done but I don't think they'll do it without the CEL on. It hasn't been on for almost ~150 miles.

I hate cars

Running lean will most definitely cause a stutter and if lean enough it will completely cut out as if the engine was shut off for a second.

Try a couple tests. Go full throttle with it at a low rpm, say 2,000-2,500rpm. Then go full throttle to redline. If it stutters at low rpm but not at high rpm it's probably ignition. If it's worse near redline when fuel volume requirement is at its highest it's the fuel system. If it runs ok when cold but gets worse as it gets hot it's probably ignition.

About a carboned up throttlebody, it can't cause drivability problems. The worst it can do is cost a few hp at full throttle but it would have to be horrible to affect power. Think of it this way, the throttle body's only purpose in life is to restrict or throttle the air going to the engine. Of carbon caused a stutter, driving at part throttle or idling would cause a stutter since the throttlebody is almost completely closed. The only time carbon is a problem is when it causes the throttle to "seal " at idle, restricting airflow to the point of choking off the engine. Once you're off idle carbon has no measurable effect.