AJ Sandoval

Please heIp! New to acurazine. I have a 07 acura tl type s 120k when I floor it in 1st and 2nd gear around 5000 to 5500 my car stutters then finishes through the rest of the rpm. there is no check engine light on in my car the ac isn't on and the only other time it did this is when my car was low on oil and I got the oil changed that was 2 month ago I don't know if it does this in the other gears I haven't tried it. Only mod is ame cold air intake

pbook4g5

Are you and automatic trans or a manual trans? First thing I would do is pull your spark plugs and take a look. Have they ever been changed?

AJ Sandoval

Manual and yes I changed them 3 months ago ngk platinum

pbook4g5

When you say stutter.... does it mean it just climbs, and then once it hits 5000, it slows, and then gets going again?

AJ Sandoval

It climb normal then around 5000-5500 it Like a jerking stutter.
When I drive normal there's nothing wrong with my car.

pbook4g5

Could be the APP sensor (but it doesn't sound like the culprit here as its constantly happening at 5000 rpm). Maybe throttle body or intake manifold butterflies being strange?

See if it happens in other gears.

1black_seven

iTrader: (2)

VTEC solenoid?

pbook4g5

^Could be that too.

I forgot to ask about the clutch. have you tried parking the car on a hill and starting out in second to see if it slips badly? Is it slipping at all?

If you were to start out in first gear at 2000 rpms.... does it run fine until it hits 5000? If so, then vtec solenoid might be the culprit.

AJ Sandoval

I haven't done that yet. but I just drove it and it only does it in 1st and 2nd and the engine light just turned on. Yay

justnspace

iTrader: (1)

^get the engine code read.
that's the only real clue that is going for you.


six speed and stuttering!? lol may have bent some valves

pbook4g5

How does the car idle?

Bent valves would usually show themselves at idle under normal (higher) vacuum situations. If they were bent bad enough to cause stumbling through the rpm range, anyway (at least thats how it was in my case).

Wonder if the car could have jumped time?

justnspace

iTrader: (1)

^that's what my car is displaying after a friend over-rev'd the engine

at idle, it sounds like it's cam'd. "loop loop loop "
but at speed it doesnt display any misses.

I'm in the process of tearing down my heads now.

pbook4g5

Yep, thats exactly how my car was when I let my dad borrow my car. He did 2-3-2, and at idle, it was nasty (complete with the flashing CEL). Up through the rpms, though... no issues.

So in the OPs case, it doesn't sound like bent valves. But, start with the easy(ier) stuff and work your way through the list.

First step is to get the code. My bet is a misfire or solenoid error.

AJ Sandoval

Got it checked it said misfire 1 2 3 4 and 6. But I changed all the ignition coils and all spark plugs (ngk platinum) 3 months ago. Could spark plugs be the reason my car is acting like this?

justnspace

iTrader: (1)

^well, you need to check.

if you did the spark plug job, it will be your job to inspect your workmanship.
Pull the coil packs and make sure all the plugs are nice and tight.

pbook4g5

Every cylinder but 5 had a misfire? That's odd.

justnspace

iTrader: (1)

^ive found that the computer doesnt really know which cylinder is loosing compression.
ive seen it on my friends TL with a bent valve and most recently my ride...

I hooked up an OBDII scanner and checked for codes...
5 of 6 cylinders were missing.
However, I know that's rarely the case for my situation. (only cuz my friend over-rev'd his engine a few years earlier)

it's usually just one or two cylinders that lose compression. not 5!!


So, while I believe that the OP's car is "missing" it's not all 5 or six cylinders.

Recheck the torque on the spark plugs, AJ!

pbook4g5

Even with bent valves, compression can be fine. Leakdown is another story, though.

Its just weird he replaced all the coils and plugs just a few months ago and now its misfiring. Like you said, first place to start is rechecking the torque on the plugs

AJ Sandoval

Thank you guys I appreciate the help.

AJ Sandoval

But now there's a check engine light that won't go away misfire in 1 3 and 6 and random misfiring but I don't wanna post a another thread because I see people get mad when there's already a threat about misfiring but I've read all the threads and my situation is different... Is someone ask I'll give details it's would be awesome to get this light to go away.

Oh Sickest TL

iTrader: (3)

no vtec for you yo

justnspace

iTrader: (1)

sorry to let you know this way.....

but you or some one over-rev'ed the car.
the heads are fucked.

you need to get a leak down and a compression test done to make sure.

then once you are sure that you need the heads replaced, replace the heads.

AJ Sandoval

OK so the original stuttering has been fixed I'm really embarrassed �� to say the reason was low oil I got if changed at a jiffy lube because between work and the bad weather at the time I couldn't do it myself.. I checked all this other stuff and took it to a shop and they couldn't guess either, I read a threads and threads and someone on another thread said check the oil.... So I did that for mine there a little dot at the bottom of the oil stick I added oil and no more shutter.. Did an oil change myself. Checked for leaks there was none and I don't over Rev my car when I drive when there a empty open road I'll downshift and go but I drive normal majority of the time. Reason I didn't say anything earlier because I forgot my password to get in here.. �� but vtec still engages and my car drives fine and no weird idle but this engine light with the misfiring code just won't go away. Saving my money for the worst case scenario that could be wrong with my car. Thanks again for taking time to look at my thread

AJ Sandoval

justnspace

iTrader: (1)

good luck

Goliath3309

Hey guys im having the same issue mine is 07 96 k miles. I recently had my valve adjustment and spark plugs replaced I got a check engine p0305. check engine light comes on only woot runs few weeks back car would go into limp mode. Any feed back would be great

Goliath3309

Its auto n still drive normal

Slpr04UA6

^I'm guessing here, but judging by your prior post about going into "limp mode", maybe it could be your APP sensor? Here is link below to read, and see if it's the same problem. Idk, just a guess.

https://acurazine.com/forums/problem...sensor-730958/


EDIT: P0305 I believe is a code for misfire.

I have an '04 TL, and had random misfire's on all cylinders after full throttle runs in 2nd gear. I looked up TSB's and found one for random misfires and the ecu had to be updated. If I remeber right, it cost me $50, and no issues since. This was years ago.....