The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A

Reply
 
Thread Tools Display Modes
  #1  
Old 04-18-2007, 11:01 AM
kis86's Avatar
kis86 kis86 is offline
replacing something or another
 
Join Date: Jan 2007
Location: Fargo, ND
Posts: 185
Send a message via MSN to kis86
Question Idle Issue, now hard shifting after cleaning throttle body

Hey guys,

When I start my car, the idle goes wayyy up, then down, then up etc for about 10 seconds. Any time I come to a stop sign or go through an drive-thru etc, it idles very rough and has died a couple time in the laft 4 months.

My thought was spark plugs and/or ignition coil(s), but I'd like to try anything else before spending money on something that might not be the problem. Anyone have an idea? I saw maybe cleaning the throttle body might help...

Last edited by kis86; 04-19-2007 at 08:19 AM.
Reply With Quote
  #2  
Old 04-18-2007, 11:17 AM
Hocrest's Avatar
Hocrest Hocrest is offline
Freezepop's are Awesome!!!!
Subaru Silver Contributor
 
Join Date: Oct 2003
Location: Pittston, PA
Posts: 5,334
Send a message via AIM to Hocrest
Is it throwing any ECU codes?

Before you start throwing parts at it, make sure the TPS is adjusted properly, that cost nothing but 1/2 an hour of your time There are instructions in the "How To Document's" up top ^^^
__________________
Dave
- 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0
Reply With Quote
  #3  
Old 04-18-2007, 11:33 AM
JaySVX's Avatar
JaySVX JaySVX is offline
Bad decisions effect everybody
 
Join Date: Mar 2007
Location: Collegeville, PA
Posts: 1,902
Send a message via AIM to JaySVX Send a message via Yahoo to JaySVX
I agree, i would check TPS, see if your throttlebody is clean, if all that checks out make sure your air filter is ok, sounds like it's starving for oxygen one way or another.
__________________
*No SVX at the moment...*
1987 Winnebago Elandan 35'
2001 Yamaha Roadstar 1600
2004 Ford Excursion Eddie Bauer, 6.0litre Power Stroke Diesel - Daily Driver.


Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well-preserved body, but rather to skid in sideways, scotch in one hand, body thoroughly used up, totally worn out and screaming HOOOOYA !!!!!
Reply With Quote
  #4  
Old 04-18-2007, 08:25 PM
JIMSVX's Avatar
JIMSVX JIMSVX is offline
.... what a sweet ride !!
 
Join Date: Apr 2005
Location: St. Louis, MO
Posts: 179
Registered SVX
I just had this happen on my '92 yesterday. I was checking the adjustment of my TPS. When I finished I started the car and the idle immediately shot way up, then it dropped down real low, finally it died. I thought I had messed up the TPS adjustment. The problem was due to a large hose that I had pulled off the throttle body to get better access to the TPS. I forgot to reconnect the hose.

Reconnecting the hose fixed the problem. Check all the hoses around your air intake, throttle body, and intake manifold. There's a bunch of them and the ECU is not happy when it gets big gulps of air, and it's not expecting it.

Good Luck
__________________
- Jim

'02 Outback - Wife's car
'96 Legacy Wagon - Son's car
'95 Legacy Sedan - #5 Daughter's car
'93 Impreza Sedan - #4 Daughter's car
'92 Claret LS-L - My car ____________
TOTAL = 595,000 Subi miles
Reply With Quote
  #5  
Old 04-19-2007, 07:03 AM
kis86's Avatar
kis86 kis86 is offline
replacing something or another
 
Join Date: Jan 2007
Location: Fargo, ND
Posts: 185
Send a message via MSN to kis86
Grr

Well, I cleaned out the throttle body and now have a new problem. First, I noticed the idle is way up now. In park, it's at 1000. In gear, it's at 1500 rpm. I used to have a problem with shuddering when letting off the gas, and that actually went away.

However...! I now feel like my transmission is going to break every time it shifts...it's shifting extremely hard. Any idea why?? I checked, and rechecked my hoses to make sure I had them all on. All the bolts are tight...Check engine light came on for about 10 minutes, then went off. Checked tranny fluid, and it's good. Checked to make sure everything is plugged in tight and in the right place
Reply With Quote
  #6  
Old 04-19-2007, 07:34 AM
jman050's Avatar
jman050 jman050 is offline
Its a Classic!
 
Join Date: Jul 2005
Location: tallahassee fl
Posts: 531
I had this problem for a while and just fixed it. I had pinched a some of the rubber intake when installing it on the throttle body. And I also had 2 cracks in my plastic intake that I fixed. Idles perfect now but Id clean the MAF and make sure theres no air getting in past the MAF through a leak or crack.
__________________
[SIGPIC][/SIGPIC]
STi BBS wheels,legacy gt 4.44, 3" catback exhaust, Stance GR+ 7k/5k, QS Teflon adjustable endlinks, Hankook EVO 245/40/17, 95-LS escaine seats, GC8 V7 steering wheel, JDM clear corners, small car clear lenses, Alcyone badge, JDM rear taillight, 97 grille, stevesby bumper, PWR radiator, Perrin Crank pulley, Urethane Swaybar bushings, urethane diff bushings, DDM 6k 55watt lows and 4500k 35watt fog lights; $15/15min mod, Motorsport whs 22mm rear swaybar, QC shift kit, ToMyx intake, z32 aluminum calipers 13" rotors, nitrous express proton + wet kit.
Reply With Quote
  #7  
Old 04-19-2007, 08:45 AM
kis86's Avatar
kis86 kis86 is offline
replacing something or another
 
Join Date: Jan 2007
Location: Fargo, ND
Posts: 185
Send a message via MSN to kis86
Forgot..

It also seemed to have lost power mode. When the check engine light was on this morning, it stayed on solid for about ten minutes...then blinked for a few and went off completely. The gear shifting is seriously terrible...I drive to work an hour away in the morning, and I feel nervous driving it back home tonight
Reply With Quote
  #8  
Old 04-19-2007, 08:51 AM
Hocrest's Avatar
Hocrest Hocrest is offline
Freezepop's are Awesome!!!!
Subaru Silver Contributor
 
Join Date: Oct 2003
Location: Pittston, PA
Posts: 5,334
Send a message via AIM to Hocrest
Check the trouble codes to see what is causing the CEL.

Have you checked/adjusted the TPS like I suggested before? A mis-adjusted TPS could cause weird idle, no "Power", and odd shifting.
__________________
Dave
- 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0
Reply With Quote
  #9  
Old 04-19-2007, 09:01 AM
kis86's Avatar
kis86 kis86 is offline
replacing something or another
 
Join Date: Jan 2007
Location: Fargo, ND
Posts: 185
Send a message via MSN to kis86
I'll try that

Turns out the TPS wasn't plugged all the way in I'll check the codes and update. Thanks for yor help!

Last edited by kis86; 04-19-2007 at 03:55 PM.
Reply With Quote
  #10  
Old 04-20-2007, 07:11 AM
kis86's Avatar
kis86 kis86 is offline
replacing something or another
 
Join Date: Jan 2007
Location: Fargo, ND
Posts: 185
Send a message via MSN to kis86
Checked codes

Well, looks like I have two bad oxygen sensors, and the erg valve looks to be stuck open as well. Would the O2 sensors cause it to idle rough enough to die once in a while?
Reply With Quote
  #11  
Old 04-27-2007, 05:28 PM
kis86's Avatar
kis86 kis86 is offline
replacing something or another
 
Join Date: Jan 2007
Location: Fargo, ND
Posts: 185
Send a message via MSN to kis86
...

anyone?
Reply With Quote
  #12  
Old 04-28-2007, 06:40 AM
Dessertrunner's Avatar
Dessertrunner Dessertrunner is offline
Registered User
 
Join Date: Jul 2005
Location: Griffith NSW
Posts: 2,156
I had bad O2 sensors so I unplugged then for a while till I got a new set. The car ran heaps better with them unpluged. I have idle problem and I use to much fuel every time I unplug the current O2 sensor the fuel ecomony improves be 2-3 litres per 100 k's which is about a 20% improvment.
Tony
__________________
1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX.
1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC)
1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car.
1995 - SVX Green low k mint condiation.
1995 - SVX Rally car, ex Matts car. Now to be used on track.
1992 - SVX red & Black being converted to Mid Engine.
1995 - SVX Red 143,000 bit rough.
Owned 5 others Subaru back to a 1974 1400 GSR.
Reply With Quote
Reply

Thread Tools
Display Modes

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 Off

Forum Jump


All times are GMT -6. The time now is 01:12 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122