+1 I use the stuff all the time on mine. I have to do my regular 3 every 2k miles cause it starts bucking. I think it might be the oiled KnN drop in that car. I have done it about 6 times so far and it totaly cures what feels like the throttle sticking and bucking and surging. My MS3 has not had any issues yet but I did clean the maf when I did my cobb sri and have only put like 500 miles on it in two months. Some regular 3's had issues with a ground wire being bad at the maf but idk. I thought that was my problem but I guess i will just keep cleaning it when it acts up.

 

[quote author=meciboy link=topic=195739.msg4104030#msg4104030 date=1314908130]
So i've posted here a couple of times about my ecu not holding a tune after being reset (disconnecting neg. term.) It would drive great for a few days or a week maybe then go back to poor throttle response, acceleration etc., no CEL's though. Was getting pretty fed up w/ my mods (CAI, BPV, turbo inlet) not performing as expected and i finally realized that my MAF sensor could be dirty. Checked the forums for what to do and Yep, it was pretty gross, have 54K on the car, probably the first time it was cleaned. Used CRC MAF sensor cleaner from Autozone $6.99 and ONLY sprayed the bulb and sensor inside the tube 3 times and let them air dry each time, came out like new. Speed3 runs great now with much more torque and response. Makes sense since the CAI is letting much more air in now it probably will get dirty faster. So if anyone else is having performance issues and might be as clueless as i was check the MAF.
[/quote]

A Cold Air Intake is sucking in more than cold air. Think about it.

 

I have a problem. Today I took apart my corksport intake to do this. I unplugged my maf sensor and after re installing everything I forgot to plug the sensor back in and ran the car at idle for a little but then I remembered. I plugged it back in and after not even 3 miles I have a cel and the car is pulling so much harder like spinning up through first off just heavy throttle. Amy ideas?

 

disconnect your battery and reset your ecu, it should be fine.

 

That's another thing i did. I disconnected the ecu directly. So I could access the turbo inlet easier. Never disconnected the battery. Bad move on my part. What's up with the extra noticeable power?

 

the car is more responsive and has more torque, with a dirty MAF the ecu wasn't adjusting for the increased air flow from the Injen intake.

 

[quote author=redms3gt link=topic=195739.msg4104658#msg4104658 date=1315000649]
I think it might be the oiled KnN drop in that car. [/quote]
You nailed it.

That's why I wanted to go with an non oiled filter for an intake. I noticed a lot of other people that have oiled filters seem to have more problems than those who don't.

I've never cleaned my MAF, I'm at 80k (bought car at 60k) I doubt the dealer did but I can't say I've ever had problems, but I'll look into it as I'm sure I need to.

 

I posted about the check engine light and wierd car running from my phone in a restauraunt. when i left the cel was gone and the car was perfect. Must have been some sort of fluke?

 

Happens.

If you nearly stall out he car the CEL will come up but I think it clears itself. I am not sure of any other circumstances but yeah.. CEL doesn't mean much more than a sensor freaking out. (now whether it's being truthful or not is a different matter lol)

Never ignore a CEL light kids.....


unless you know it's because a family of squirrels is living in your engine bay.

 

I didnt ignore it. It had me worried. But the car was fine idled right, ran right, and felt right after i left that place with no CEL. So it must have been the few seconds i forgot to have my MAFs plugged in. With the CEL my gears seemed longer. First gear spun up leaving from a stop at half throttle. Not from aggressive driving or any type of launch. It started to spin around 4500 rpm the tires just broke loose.

 

Yeah haha not having the MAF plugged in would throw you a CEL.

I did that this weekend too with my throttle body; I forgot to plug the cables in.
Car makes a WEIRD sound.. scared the crap out of me. I started up twice and then remembered I never plugged it in LOL!

Only other time I got a CEL was with my SRI.. which the coupling had literally split down the middle and the whole thing was hanging there. I wasn't worried when it popped up but when I stopped and saw what happened I was like.. hooooooly shhiiiiiii that could've been bad!

 

well, my problem doesn't seem to be a dirty MAF after all. The car has gone back to running shitty again, took about 3 days this time. Poor throttle response, rough idle, low power and torque, the clutch even engages differently. I was beating on the Speed today and could barely break the tires loose, and it was 61 degrees, this car should be flying. Been reading the forums here and these symptoms seem pretty common in the 3's but no one had a clear-cut answer. I'm REALLY getting tired of this car running like crap and may just get rid of it. I'll check over everything again but i can't keep resetting the ecu so it runs right. If ANYONE has any ideas...

 

What mods do you have? Does the tires spin with you rev up and dump the clutch? Do you have the stock tune on the car? Mine doesnt spin up the tires either. Mine in first gear from a roll out to a fullthrottle just goes. It pulls hard but doesnt spin the tires up or chirp very much. Remember the speed from our cars comes from 4th gear on stock tune. Ever notice how 4th seems to really spool up and start to pull back even more than third sometimes. Its cuz theres no boost restriction in 4th up. 1st 2nd and 3rd all have some sort of boost restriction which trys to keep the car i guess "safer". If im wrong please someone correct me. But please tell me what mods you have. The car also tries to correct itself off of your mods. basicly it tries to stay at the same power levels and such even with your mods by making adjusments to the ECU in real time. thats why the car runs like crazy when you first reset the battery and when the car relearns it seems to slow a bit.

 

My only mods are Injen CAI, Forge BPV, Cobb Turbo Inlet, shifter bushings and rear engine mnt., not a lot as far as performance/HP goes. I spent about an hour and re-cleaned the MAF, took the battery out, inter-cooler off, checked all connectors and hoses/clamps. Found the hose clamp connecting the turbo inlet to the turbo was very loose, it actually was not snug on the turbo so i must of had boost leak. Car of course runs better now like it always does after a reset. So your saying that the ecu will always "fight" the mods we put on these cars to make them more conservative? What's the point of getting all these performance parts w/o a permanent tune or AP? Don't have the $600 for the AP right now so i'll just have to keep resetting?

 

Well you dont have much power wise just the intake will add maybe 3 to the wheels or so but should change the curve a little to make it feel faster in certain areas. As for not ripping up the tires your rear motor mount is what is stopping that. the rear motor mount really decreases wheel spin and wheel hop on these cars. AP is a really good investment. Mine is coming in this week but i have used them on my friends speed 3. Ive also driven speed3s on both stage1 and stage2 tunes and there is a solid difference with the locked ECU. theres no learning and conservative interaction with the ECU.

 

That stage 2 AP had to be a blast. Know what Hp/torque you were running? I will get an AP someday, they do sound like a good investment. I was so frustrated w/ the performance because i couldn't pull away from a new Dodge Caliber SRT4 the other night, (just the icing on the cake), he said his car was nowhere near stock but that car is so friggin' ugly it deserves to be embarrassed no matter what it has. Also have the Eibach Prokit which helps even more to put the power down, never really thought about that.

 

I dont know the HP numbers on stage 2. Join the club on the caliber SRT4. Look a few posts back the one that says lost to caliber SRT4, that was started by me. The forum was removed because of no talk of street racing is allowed. Which is understandable so im not going to discuss it here. However im in the same boat. Cars need to be tuned to the mods you put on to get the most out of them. Some pulls will be better than others.

 

So...after all this hassle. The turbo inlet was loose, tightened it, MAF clean now. Threw a CEL 2 days later, your standard 401(EGR valve dirty) per Autozone and this forum (thanks for the codes). Put a bottle of Lucas fuel treatment in for the hell of it. CEL went off next day and car is running great and my gas mileage has gone way up so this is good. Was getting maybe 140 miles/half tank, this week i got almost 200. Probably will be cleaning the EGR valve and pipe in the near future for good measure.

 

[quote author=BT2010speed link=topic=195739.msg4105772#msg4105772 date=1315250624]
What mods do you have? Does the tires spin with you rev up and dump the clutch? Do you have the stock tune on the car? Mine doesnt spin up the tires either. Mine in first gear from a roll out to a fullthrottle just goes. It pulls hard but doesnt spin the tires up or chirp very much. Remember the speed from our cars comes from 4th gear on stock tune. Ever notice how 4th seems to really spool up and start to pull back even more than third sometimes. Its cuz theres no boost restriction in 4th up. 1st 2nd and 3rd all have some sort of boost restriction which trys to keep the car i guess "safer". If im wrong please someone correct me. But please tell me what mods you have. The car also tries to correct itself off of your mods. basicly it tries to stay at the same power levels and such even with your mods by making adjusments to the ECU in real time. thats why the car runs like crazy when you first reset the battery and when the car relearns it seems to slow a bit.
[/quote]

What tires are you running? I'm almost at 20k with the stock tires and it's VERY easy to spin the tires, gunning it in 1st and 2nd I can get the wheels to spin while moving. Only have SRI and TIP for performance mods.

Sometimes it gets annoying when I start and give it a little gas, tires start to squeal.

 

Running pretty worn Kumho ECSTA SPT's, they were on the car when i bought them and i put on about 20K since. Will be buying new tires (same) this winter. I have no problem breaking the tires loose in 2nd, maybe 3rd if i really tried. When its wet, forget it, can spin forever in any gear--time for new set. TireRack is running a special thru Nov.30th