Sti jerking and stutering

acssa · 07-08-2008, 07:11 AM

I have an 07 sti and I put APS CIA 65, 725 FMIC, BOV and HKS EVC6.

The car is now behaving strange, stutter (serge) on steady 1/4 - 1/2 throttle...3300rpm -4500rpm

BUT WAIT THERE IS MORE...

You get a single jerk of note coming of the throttle on a up hill full throttle.

Can anyone please help????

"From South Africa"

STi_FTW · 07-08-2008, 07:16 AM

BOV and CIA with no EM

EDIT: Take the BOV and CIA off or get a protune with them on.

tb202 · 07-08-2008, 07:20 AM

Engine Management???? You are killing your car. Get rid of the BOV.

bluedemon_II · 07-08-2008, 08:15 AM

You have an 07 dude... i mean you will pretty much open a new thread "if you don't remove the CAI and BOV and everything else" with the title ..My engine blew up.. and ppl will see that it is an 07 and go"meh it happens every day"

On the side note this is not a lol mater, take the mods off until you can tune it.

Boostpimp · 07-08-2008, 08:26 AM

Pro-tune or return to stock.

fullerton · 07-08-2008, 08:29 AM

Everything you listed requires a protune to run.

Chances are, your engine is going extremely rich between shifts and possibly dangerously lean while on throttle.

Do two things immediately:
1- Start saving for a new block.
2- Remove all listed mods and revert to stock or get a protune if a tuner is in your area. You could also "email tune".

fourseasonsandles · 07-08-2008, 08:34 AM

Listen to what everyone else said in this thread. Engine management is key in your situation.

Start using the search button and find out why a BOV and CAI are not good for your car unless you have a custom tune. The FMIC is a waste unless you plan to upgrade to a bigger turbo. The exhaust just needs engine management to run properly.

Research is your friend before you put anything on your car. Right now you are beating it to death and on an 07..

Also, welcome to the site!

bulgarianfreak55 · 07-11-2008, 09:09 AM

I find it interesting that everyone is focusing on the CAI and BOV but not on the FMIC!!! You put a FMIC without tune what are you smoking???? Your car must really be running like s**t.

TUNE

***gametime36*** · 07-11-2008, 11:07 AM

Quote:

Originally Posted by acssa

I have an 07 sti and I put APS CIA 65, 725 FMIC, BOV and HKS EVC6.

Ouch.

ManInABox · 07-11-2008, 11:16 AM

I made the mistake of putting on a intake right after i bought my 07.....yeah that was a big mistake. Car rode like crap. Take that crap off asap.

***STI Dy*** · 07-11-2008, 11:35 AM

If he really doesn't an EM isn't he falling into the bad stock map on the 07 with the stutter at 3 grand mark? The stutter may have always been there but now it's just more noticable with the mods? The dealer may not put the latest flash on your car under warranty after these mods. Regardless, listen to everybody here and fix it right away.

07-08-2008, 07:11 AM	#1
acssa Lurker Car: 07 WRX STI Fav Mod: Coming Soon Posts: 1 Join Date: Jul 2008 Trader Rating: (0)	Sti jerking and stutering I have an 07 sti and I put APS CIA 65, 725 FMIC, BOV and HKS EVC6. The car is now behaving strange, stutter (serge) on steady 1/4 - 1/2 throttle...3300rpm -4500rpm BUT WAIT THERE IS MORE... You get a single jerk of note coming of the throttle on a up hill full throttle. Can anyone please help???? "From South Africa" This ad is not endorsed by this member. Please register or login to hide this ad.

07-08-2008, 07:16 AM	#2
STi_FTW STI Driver Car: 05 CGMud STi Fav Mod: Stage 2 w/Catless DP Location: Richmond, VA Posts: 264 Join Date: Aug 2007 Trader Rating: (0)	Re: Sti jerking and stutering BOV and CIA with no EM EDIT: Take the BOV and CIA off or get a protune with them on. Last edited by STi_FTW : 07-08-2008 at 07:18 AM. Reason: adding

07-08-2008, 07:20 AM	#3
tb202 Amateur STI Driver Car: SWP 07 WRX STI Fav Mod: Seatbelt Ding Disabled Location: NY Posts: 26 Join Date: Nov 2007 Trader Rating: (0)	Re: Sti jerking and stutering Engine Management???? You are killing your car. Get rid of the BOV.

07-08-2008, 08:15 AM	#4
bluedemon_II Professional STI Driver Car: 04 Sti Wrb on Silver Location: Hatillo, Puerto Rico Posts: 498 Join Date: Jul 2007 Trader Rating: (0)	Re: Sti jerking and stutering You have an 07 dude... i mean you will pretty much open a new thread "if you don't remove the CAI and BOV and everything else" with the title ..My engine blew up.. and ppl will see that it is an 07 and go"meh it happens every day" On the side note this is not a lol mater, take the mods off until you can tune it.

07-08-2008, 08:26 AM	#5
Boostpimp Grassroots STI Racer Car: 04 WRB/G STi Fav Mod: Sz49 + Meth Location: South Carolina Posts: 537 Join Date: Jun 2004 Trader Rating: (2)	Re: Sti jerking and stutering Pro-tune or return to stock.

07-08-2008, 08:29 AM	#6
fullerton abracious Car: AW GDF-D Fav Mod: Track time Location: Near a 100oct pump Posts: 16,538 Join Date: Oct 2005 Trader Rating: (10)	Re: Sti jerking and stutering Everything you listed requires a protune to run. Chances are, your engine is going extremely rich between shifts and possibly dangerously lean while on throttle. Do two things immediately: 1- Start saving for a new block. 2- Remove all listed mods and revert to stock or get a protune if a tuner is in your area. You could also "email tune".

07-08-2008, 08:34 AM	#7
fourseasonsandles Silver Member Car: 06 CGM Wingless Fav Mod: The Newest One! Location: Ra cha cha NY Posts: 3,313 Join Date: Sep 2005 Trader Rating: (0)	Re: Sti jerking and stutering Listen to what everyone else said in this thread. Engine management is key in your situation. Start using the search button and find out why a BOV and CAI are not good for your car unless you have a custom tune. The FMIC is a waste unless you plan to upgrade to a bigger turbo. The exhaust just needs engine management to run properly. Research is your friend before you put anything on your car. Right now you are beating it to death and on an 07.. Also, welcome to the site!

07-11-2008, 09:09 AM	#8
bulgarianfreak55 Junior STI Driver Car: 04 Subaru WRX STi Fav Mod: Invidia Catless DP Location: Fairfax, VA Posts: 73 Join Date: Jul 2007 Trader Rating: (0)	Re: Sti jerking and stutering I find it interesting that everyone is focusing on the CAI and BOV but not on the FMIC!!! You put a FMIC without tune what are you smoking???? Your car must really be running like s**t. TUNE

07-11-2008, 11:16 AM	#10
ManInABox Junior STI Driver Car: 07 UGM STI Fav Mod: Cobb AP Location: Baton Rouge, La. Posts: 164 Join Date: Mar 2007 Trader Rating: (0)	Re: Sti jerking and stutering I made the mistake of putting on a intake right after i bought my 07.....yeah that was a big mistake. Car rode like crap. Take that crap off asap.

07-11-2008, 11:35 AM	#11
*STI Dy* Platinum Member Car: 07 OBP STi Fav Mod: DRL Delete Location: Shoreline, WA Posts: 110 Join Date: Apr 2007 Trader Rating: (1)	Re: Sti jerking and stutering If he really doesn't an EM isn't he falling into the bad stock map on the 07 with the stutter at 3 grand mark? The stutter may have always been there but now it's just more noticable with the mods? The dealer may not put the latest flash on your car under warranty after these mods. Regardless, listen to everybody here and fix it right away. This ad is not endorsed by this member. Please register or login to hide this ad.