Go Back   Subaru Impreza Forum - WRX STI Rally Performance Tuning > Subaru Impreza Technical Area > Technical General

Subaru Impreza Forum

newbie needs help
Reply
 
LinkBack Thread Tools Display Modes
Old 14 Feb 2009, 01:13 PM   #1 (permalink)
Fresh Scooby
 
picky's Avatar
 
Join Date: Jul 2008
Location: aberdeen
Posts: 4
newbie needs help

hi there i have a 1999 wrx sti v5 when my car is idleing it is missing i booked it into the garage they said it was the throttle position sensor so i fitted a new one and it was still the same since then i have changed plugs, leads, labamba,throttle posistion sensor, crank sensor,camshaft sensor ,coil pack,air flow maf sensorand it is still doing it i changed the down pipe to a decat not sure if that might be the problem as i have never had it remaped can any one help as it is doing my head in picky
Offline   Reply With Quote
Old 14 Feb 2009, 01:44 PM   #2 (permalink)
Veteran Scooby
 
rikimaru's Avatar
 
Join Date: Aug 2006
Location: Sussex
Posts: 3,335
Re: newbie needs help

Mine is doing the same thing at the moment and I also can't find the fault. Seems like you've checked/replaced all the usual suspects. However, you say you haven't had it re-mapped after a full decat so that may well be the issue. My car is 100% stock so can't say for sure, but it is defeintely a real possibilty and I'm sure someone with a decat will be along to help you out. Also have you had it mapped for UK fuel? Here we have 100 Ron fuell which you can't get in the UK, highest you get is 99 Ron (i think) so you'll need to map your car to run on UK fuel. At the very least you'll need to use an octane booster if you are not doing so already.

UKdave posted a link regarding the IACV, worth a look as this could be your problem. haven't got round to cleaning mine yet as haven't had the time but will be doing it shortly.

Cleaning And Reattaching The IACV (Idle Air Control Valve) - NASIOC

Last edited by rikimaru; 14 Feb 2009 at 01:50 PM.
Offline   Reply With Quote
Old 14 Feb 2009, 05:13 PM   #3 (permalink)
Veteran Scooby
 
uk dave's Avatar
 
Join Date: Feb 2005
Location: Impreza Preservation Society HQ
Posts: 4,399
Send a message via MSN to uk dave
Re: newbie needs help

Clutching at straws check your earth leads-battery to chassis/chassis to engine etc never took much notice on mine as never had any probs though on other cars ive had dealings with that have had average to poor earths due to corrosion has caused all kinds of problems.


Can remember on lee`s RS nearly burning me hand off one night when it started acting up-grabbed hold of the earth lead from battery to chassis an it were red hot due to poor connection,got a new earth lead next day an it were sound after that.


Aint definately saying thats the prob here but aint a expensive thing to look at to rule out.
__________________
Best sealant used to date- Fourstar ultimate paint protection *Now discontinued* Rebranded as sonus SFX4 paint sealant-Try some ya wont be dissapointed.
Offline   Reply With Quote
Old 14 Feb 2009, 06:42 PM   #4 (permalink)
Obsessed Scooby
 
stiimpreza1984's Avatar
 
Join Date: Jul 2008
Location: Cork, Ireland
Posts: 7,475
Re: newbie needs help

As Dave said above and Id clean the idle air control valve(iacv) to
Offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
another newbie marcel Newbies - Say Hello Here 2 01 Nov 2008 04:26 PM
Newbie asking about alloys stirus Newbies - Say Hello Here 17 28 Feb 2005 10:18 PM
Yet another newbie havoline Newbies - Say Hello Here 11 15 Oct 2004 08:20 AM
Another Newbie kayeabl Newbies - Say Hello Here 8 19 Jul 2004 06:30 AM


All times are GMT. The time now is 11:17 PM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.