97 Subaru WRX STI ver 4 Problems.

bradsimmo · 03-14-2008, 06:58 PM

Hi All

I'm happy to be part of your forum.
I have a problem with my suby and was wondering if youd be able to help me with it.
Its the idling at stand still. Its ok when its cold it idles at 1000rpm roughly with is great but when its been running for awhile ill pull up to lights and the rev's drop so low it cuts the motor out. quite embassarsing lol. if it dosent cut out it drops to 100rpm or so then raises to about 800rpm is this right???

Thanks,
Brad Simmo

***Draco-REX*** · 03-15-2008, 10:47 AM

Unfortunately, the US didn't get STIs until '04. So the GC STIs are a little-known quantity here.

If I were to guess, it might be a dirty MAF.

3k1n · 03-15-2008, 10:51 AM

Do you have a blow off valve ? maybe an after market intake? if so what brand. My old wrx had the same problem and it turned out to be the intake and the blow off valve messing with the A/F ratio.

bradsimmo · 03-19-2008, 05:54 PM

i cant find out what the problem is. it backfires from time to time too. anymore ideas?

bradsimmo · 03-19-2008, 05:55 PM

and wats a maf sensor?? and how do i find it?

ilikepie · 03-20-2008, 10:04 AM

Mass Air Flow sensor. Located on the intake. Do you have a K&N air filter by chance?

3k1n · 03-21-2008, 02:11 PM

It would help if you could tell us what you have done to the car as far as aftermarket parts.

bradsimmo · 03-21-2008, 08:57 PM

it has a bov and thats about it when it comes to aftermarket gear. itsa still got the original box air flow and filter.

***Szumita*** · 03-21-2008, 09:08 PM

get rid of the bov, thats your issue. also, clean your MAF sensor

03-14-2008, 06:58 PM	#1
bradsimmo Lurker Car: 97 Wrx Sti Ver 4 Fav Mod: Coming Soon Posts: 4 IWSTI Addict since: Mar 2008 Trader Rating: (0)	97 Subaru WRX STI ver 4 Problems. Hi All I'm happy to be part of your forum. I have a problem with my suby and was wondering if youd be able to help me with it. Its the idling at stand still. Its ok when its cold it idles at 1000rpm roughly with is great but when its been running for awhile ill pull up to lights and the rev's drop so low it cuts the motor out. quite embassarsing lol. if it dosent cut out it drops to 100rpm or so then raises to about 800rpm is this right??? Thanks, Brad Simmo This ad is not endorsed by this member. Please register or login to hide this ad.

03-15-2008, 10:47 AM	#2
*Draco-REX* Black Dragon STI Car: 07 OBP STi 03WRB WRX Fav Mod: My whole suspension Location: Columbus, OH Posts: 1,702 IWSTI Addict since: Jan 2005 Trader Rating: (0)	Re: 97 Subaru WRX STI ver 4 Problems. Unfortunately, the US didn't get STIs until '04. So the GC STIs are a little-known quantity here. If I were to guess, it might be a dirty MAF.

03-15-2008, 10:51 AM	#3
3k1n Junior STI Driver Car: 05 WRX STi Fav Mod: APS TBE R1 Location: Boston Posts: 116 IWSTI Addict since: Apr 2007 Trader Rating: (0)	Re: 97 Subaru WRX STI ver 4 Problems. Do you have a blow off valve ? maybe an after market intake? if so what brand. My old wrx had the same problem and it turned out to be the intake and the blow off valve messing with the A/F ratio.

03-19-2008, 05:54 PM	#4
bradsimmo Lurker Car: 97 Wrx Sti Ver 4 Fav Mod: Coming Soon Posts: 4 IWSTI Addict since: Mar 2008 Trader Rating: (0)	Re: 97 Subaru WRX STI ver 4 Problems. i cant find out what the problem is. it backfires from time to time too. anymore ideas?

03-19-2008, 05:55 PM	#5
bradsimmo Lurker Car: 97 Wrx Sti Ver 4 Fav Mod: Coming Soon Posts: 4 IWSTI Addict since: Mar 2008 Trader Rating: (0)	Re: 97 Subaru WRX STI ver 4 Problems. and wats a maf sensor?? and how do i find it?

03-20-2008, 10:04 AM	#6
ilikepie Grassroots STI Racer Car: 05 WRB STi Fav Mod: Pro Tune Location: Misery (MO) Posts: 550 IWSTI Addict since: Oct 2005 Trader Rating: (0)	Re: 97 Subaru WRX STI ver 4 Problems. Mass Air Flow sensor. Located on the intake. Do you have a K&N air filter by chance?

03-21-2008, 02:11 PM	#7
3k1n Junior STI Driver Car: 05 WRX STi Fav Mod: APS TBE R1 Location: Boston Posts: 116 IWSTI Addict since: Apr 2007 Trader Rating: (0)	Re: 97 Subaru WRX STI ver 4 Problems. It would help if you could tell us what you have done to the car as far as aftermarket parts.

03-21-2008, 08:57 PM	#8
bradsimmo Lurker Car: 97 Wrx Sti Ver 4 Fav Mod: Coming Soon Posts: 4 IWSTI Addict since: Mar 2008 Trader Rating: (0)	Re: 97 Subaru WRX STI ver 4 Problems. it has a bov and thats about it when it comes to aftermarket gear. itsa still got the original box air flow and filter.

03-21-2008, 09:08 PM	#9
*Szumita* i eat cones Car: 08 MKV GTI Fav Mod: intake Location: ma & ri Posts: 6,843 IWSTI Addict since: Oct 2006 Trader Rating: (21)	Re: 97 Subaru WRX STI ver 4 Problems. get rid of the bov, thats your issue. also, clean your MAF sensor This ad is not endorsed by this member. Please register or login to hide this ad.

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