Low RPM stutter - Subaru Enthusiasts Car Club of the Sierras

vinylworks · 2007-04-25, 10:16 AM

Greetings fellow subaru lovers, I apologize if my first post on your forum is a simple question, but I need advice badly. My '01 RS recently started stuttering on takeoff, but only at low RPMs. Actually it happens in any gear below 2000 RPM when I mash the throttle. Steve Barsotti suggested that it may be an air fuel ratio sensor gone bad, which seems plausible enough to me, but I'm having trouble finding the replacement part. ANY info would be greatly appreciated. TIA.

100_Percent_Juice · 2007-04-25, 11:06 AM

Welcome to the board.
remember to stand up at 12:15 or you might get shanked

MPREZIV · 2007-04-25, 11:17 AM

Welcome!

Could be AFR sensor, or a multitude of other things. Check Engine Light? The best to do would be if you could get an OBD2 scanner that allows you to read sensor values, and actually SEE if there's a sensor problem. Failing that, check fuel delivery, for air restrictions (i.e. intake plugged/air filter dirty), etc...

vinylworks · 2007-04-25, 12:19 PM

No check engine light, and my obd2 scanner failed to recognize anything "out of whack" (technical term, or so I'm told) although, as far as I know, it only reads the check engine failure code and not any sensor settings or readings. Any suggestions as to where I can purchase this AFR sensor and the approximate price?

MPREZIV · 2007-04-25, 01:20 PM

There's a website that sells new subi parts at a good price, but I can't remember it... anyone?

Sucks your scanner won't allow you to read sensor values...

Kevin M · 2007-04-25, 01:35 PM

There's a bunch of places to get OE parts online. My favorites are www.subaruparts.com (Tacoma Subaru) and www.subaruwrxparts.com (Exeter Subaru in New Hampshire).

sybir · 2007-04-25, 03:20 PM

As an aside, Steve knows his stuff; why not have him fix it for you since you're already working with him? That's the bonus of a shop doing diagnosis; they'll then stand behind resolving the issue uinstead of throwing parts at it in a guessing game.

cody · 2007-04-26, 09:23 AM

www.subarugenuineparts.com is another option (Chaplin VW/Subaru, Bellevue WA)

2007-04-25, 10:16 AM	#1
vinylworks n00b Join Date: Apr 2007 Location: Auburn, CA Posts: 2 Car: 2001 Subaru Impreza 2.5 RS Life is short, enjoy every minute of it.	Low RPM stutter Greetings fellow subaru lovers, I apologize if my first post on your forum is a simple question, but I need advice badly. My '01 RS recently started stuttering on takeoff, but only at low RPMs. Actually it happens in any gear below 2000 RPM when I mash the throttle. Steve Barsotti suggested that it may be an air fuel ratio sensor gone bad, which seems plausible enough to me, but I'm having trouble finding the replacement part. ANY info would be greatly appreciated. TIA.

2007-04-25, 11:06 AM	#2
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	Welcome to the board. remember to stand up at 12:15 or you might get shanked __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin

2007-04-25, 11:17 AM	#3
MPREZIV Token Real Name: Le Stig Afrique? Join Date: Jun 2005 Location: sitting next to a big yellow box Posts: 3,589 Car: 2001 Impreza 2.5 RS Class: 05 TDSP No, I won't work on your car. F your car*	Welcome! Could be AFR sensor, or a multitude of other things. Check Engine Light? The best to do would be if you could get an OBD2 scanner that allows you to read sensor values, and actually SEE if there's a sensor problem. Failing that, check fuel delivery, for air restrictions (i.e. intake plugged/air filter dirty), etc... __________________ "...these condoms have a topical anesthetic to reduce sensitivity, so you can last longer. What a paradox. You can't feel a thing, but you can f*ck for HOURS..."

2007-04-25, 12:19 PM	#4
vinylworks n00b Join Date: Apr 2007 Location: Auburn, CA Posts: 2 Car: 2001 Subaru Impreza 2.5 RS Life is short, enjoy every minute of it.	No check engine light, and my obd2 scanner failed to recognize anything "out of whack" (technical term, or so I'm told) although, as far as I know, it only reads the check engine failure code and not any sensor settings or readings. Any suggestions as to where I can purchase this AFR sensor and the approximate price? Last edited by vinylworks; 2007-04-25 at 12:21 PM. Reason: missing information about OBD2 scanner

2007-04-25, 01:20 PM	#5
MPREZIV Token Real Name: Le Stig Afrique? Join Date: Jun 2005 Location: sitting next to a big yellow box Posts: 3,589 Car: 2001 Impreza 2.5 RS Class: 05 TDSP No, I won't work on your car. F your car*	There's a website that sells new subi parts at a good price, but I can't remember it... anyone? Sucks your scanner won't allow you to read sensor values... __________________ "...these condoms have a topical anesthetic to reduce sensitivity, so you can last longer. What a paradox. You can't feel a thing, but you can f*ck for HOURS..."

2007-04-25, 01:35 PM	#6
Kevin M EJ22T Join Date: Sep 2003 Location: Reno Posts: 9,445 Car: '93/'01 GF6, mostly red Class: 19 FP	There's a bunch of places to get OE parts online. My favorites are www.subaruparts.com (Tacoma Subaru) and www.subaruwrxparts.com (Exeter Subaru in New Hampshire). __________________ FWD is the new AWD

2007-04-25, 03:20 PM	#7
sybir The Don Real Name: Aaron Join Date: Oct 2003 Location: Sacramento Posts: 3,097 Car: '97 Legacy / '05 FXT Class: low	As an aside, Steve knows his stuff; why not have him fix it for you since you're already working with him? That's the bonus of a shop doing diagnosis; they'll then stand behind resolving the issue uinstead of throwing parts at it in a guessing game. __________________ Tact is for people who aren't witty enough to be sarcastic.

2007-04-26, 09:23 AM	#8
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	www.subarugenuineparts.com is another option (Chaplin VW/Subaru, Bellevue WA) __________________ Slow and low, that is the tempo.

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