idle issues - Subaru WRX Forum
 
LinkBack Thread Tools Display Modes
#1 Old 08-29-2010, 12:15 PM
WRXtuners Member
 
phatmike0704's Avatar
 
Join Date: May 2008
Location: Illinois
Posts: 147
phatmike0704 is an unknown
Send a message via AIM to phatmike0704 Send a message via Yahoo to phatmike0704
idle issues

Background: 04 wrx, big 16g, modded injectors, grimmspeed ebcs, K&N CAI(but recently switched to short ram without tuning), type rs bov, 255 pump, silicon inlet, headers, up pipe, full exhaust, base tune from Matt at benchmark. Filled with 89 for a few months when i got it since it had no mods, but been doin 93 for the past 2 years after mods. Threw a code for cylinder 1 misfire last month but went away after i took the sparks out and put em back in

Issue: At idle, my vacuum is at -.05MPa-(-.06MPa) and everytime im just driving and come to stop, i let off the gas and pop in neutral and my rpms drop to 500 even lower sometimes and jumps back up to 800-900. I also feel some slight hesitation before 0psi and 1700-2000rpm.

What I done: Checked for leaks, found one in the inlet, fixed it and hesitation is gone. Sprayed maf with maf cleaner and cleaned IACV and replaced gasket.

2 months ago we had a nasty flood in chicago and i got stuck on a flooded street. I had my CAI on then. So i just drove real slow on the street tryin not suck up any water. But i did and my car died. I was cranking it constantly and white smoke kept coming out the exhaust. The car kept dying and i kept cranking and praying it wouldnt hydrolock. luckily it finally started and i was on my way. I think thats when my idle got jacked up. I think the MAF went bad or O2 sensor but im not throwing any codes. Is there anyway to test the MAF or O2 sensor?
phatmike0704 is offline  
Sponsored Links
Advertisement
 
#2 Old 08-29-2010, 02:30 PM
WRXtuners Member
 
Chase's Avatar
 
Join Date: Sep 2007
Location: Washington
Posts: 978
Images: 2
Chase is a WRX expert worth listening to Chase is a WRX expert worth listening to Chase is a WRX expert worth listening to
Might be able to get them tested at subaru, but those both sound like good places to start. My bad o2 sensor made some pretty funky ideling and hesitation for me too. Check the hose in the pic too, right behind the alternator that connects to the blue nipple. It's easy to overlook, I had a crappy idle a month back because of it. But I think it usually throws a 0457 or something with it...
Attached Images
 

355 awhp fp green six speed wagon in Corvette Atomic Orange
-Brandon
Chase is offline  
#3 Old 08-29-2010, 03:09 PM
WRXtuners Member
 
phatmike0704's Avatar
 
Join Date: May 2008
Location: Illinois
Posts: 147
phatmike0704 is an unknown
Send a message via AIM to phatmike0704 Send a message via Yahoo to phatmike0704
i seen that hose before lol. its connected but where does the other end of it connect to? intake mani?
phatmike0704 is offline  
#4 Old 08-30-2010, 12:46 PM
WRXtuners Member
 
phatmike0704's Avatar
 
Join Date: May 2008
Location: Illinois
Posts: 147
phatmike0704 is an unknown
Send a message via AIM to phatmike0704 Send a message via Yahoo to phatmike0704
if my maf or 02 sensor is going bad, wouldnt i get a code?
phatmike0704 is offline  
#5 Old 08-30-2010, 04:05 PM
WRXtuners Member
 
basco's Avatar
 
Join Date: Aug 2004
Location: South Carolina
Posts: 1,873
basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to
Send a message via AIM to basco Send a message via MSN to basco
not always

FP GT35R MoTeC M800 AndrewTech PPG'd Wagon - 513AWHP
06 Mazdaspeed6 280/330
- Matt
basco is offline  
#6 Old 08-31-2010, 06:38 PM
WRXtuners Member
 
phatmike0704's Avatar
 
Join Date: May 2008
Location: Illinois
Posts: 147
phatmike0704 is an unknown
Send a message via AIM to phatmike0704 Send a message via Yahoo to phatmike0704
well guess what, i checked all lines and redid all of them atleast 20 times. And now my car cranks and fires but dies right after. when i turn it on, it jumps to 1500rpm and and vacuum jumps to 0 and dies. i could keep it on if i keep reving it. but i hear a weird popping sound in the engine bay. Now i unplugged the maf and the car stays on but jumps to 3krpm and stays there, it drops to 2500 and keeps revving back upto 3k rpm. im getting suggestions on another forum that the IACV is bad, maf is bad and my car could be running rich or lean. please help guys, i been stuck on this for the past 3 days and dont what to do

here's my original thread at nasioc and appearently no one wants to help.
engine fires but dies HELP!!!!!!!! - NASIOC
phatmike0704 is offline  
#7 Old 08-31-2010, 07:05 PM
WRXtuners Member
 
Chase's Avatar
 
Join Date: Sep 2007
Location: Washington
Posts: 978
Images: 2
Chase is a WRX expert worth listening to Chase is a WRX expert worth listening to Chase is a WRX expert worth listening to
Sorry man, you need to find a GOOD shop that'll work with you. I usually take my car in for diagnosis then do the work myself. Just tell them to figure it out and call you with the problem.
Find somewhere that doesn't charge 80 an hour for smoking a cigarette and scratching their head. And when you do find it, please post the results. I'm curious, sorry I'm not more help.

Again, I had a bad o2 sensor for 2 years and it never threw a code. I replaced it after it got physically damaged and it just happened to fix my idle issues. So, it can be a sensor without a code.

355 awhp fp green six speed wagon in Corvette Atomic Orange
-Brandon
Chase is offline  
#8 Old 09-01-2010, 08:30 AM
WRXtuners Member
 
phatmike0704's Avatar
 
Join Date: May 2008
Location: Illinois
Posts: 147
phatmike0704 is an unknown
Send a message via AIM to phatmike0704 Send a message via Yahoo to phatmike0704
gonna do a boost leak test today. will let u guys no whats up
phatmike0704 is offline  
#9 Old 09-01-2010, 09:39 AM
WRXtuners Member
 
basco's Avatar
 
Join Date: Aug 2004
Location: South Carolina
Posts: 1,873
basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to
Send a message via AIM to basco Send a message via MSN to basco
for it to run like that you've got to have a leak in your intake system after the MAF sensor, you might want to check the turbo inlet to see if it's collapsed or torn

FP GT35R MoTeC M800 AndrewTech PPG'd Wagon - 513AWHP
06 Mazdaspeed6 280/330
- Matt
basco is offline  
#10 Old 09-07-2010, 05:44 PM
WRXtuners Member
 
phatmike0704's Avatar
 
Join Date: May 2008
Location: Illinois
Posts: 147
phatmike0704 is an unknown
Send a message via AIM to phatmike0704 Send a message via Yahoo to phatmike0704
she's in the shop, let them deal with it now lol
phatmike0704 is offline  
#11 Old 10-19-2010, 03:39 PM
WRXtuners Member
 
phatmike0704's Avatar
 
Join Date: May 2008
Location: Illinois
Posts: 147
phatmike0704 is an unknown
Send a message via AIM to phatmike0704 Send a message via Yahoo to phatmike0704
well got her back from the shop, swapped manifold and TB and still got my problem. rpms still drop, could it be a cracked ringland that causes this?
phatmike0704 is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On