Fresh rebuild..rough idle?? - Subaru WRX Forum
 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 09-12-2009, 05:31 PM Thread Starter
WRXtuners Member
 
Join Date: Jul 2009
Location: Michigan
Posts: 2
Ross1 is an unknown
Fresh rebuild..rough idle??

I have an 04 sti, just rebuilt the motor, started it today and it will not idle. If I keep it idling it runs rough and will backfire when the rpm's get below 1000. The engine was rebuilt to all stock specs. I have a DP and turbo intake pipe otherwise everything else on the car is stock. I am new to subis, but have worked on dsm's for years. The cel has not come on, but I only had the car running for a few minutes. Any input will help .
Ross1 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 09-12-2009, 07:35 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
It's going to sound like hell on your first start up. I cringed when I first started mine up, it sounded terrible. We let it run long enough to get warmed up, then I took it out for a drive, and kept it around 2k. It should smooth out.

355 awhp fp green six speed wagon in Corvette Atomic Orange
-Brandon
Chase is offline  
post #3 of 5 Old 09-12-2009, 08:44 PM
WRXtuners Member
 
ratfink's Avatar
 
Join Date: Oct 2008
Location: Idaho
Posts: 518
ratfink is a helpful contributing member
Are you sure you've got it timed right? Maybe the belt isn't on right?

Brad

AEM CAI, Perrin ELH wrapped, Catted Downpipe, Stage II XPT tune, K4RT30Y STS, lip, shark fin
ratfink is offline  
post #4 of 5 Old 09-14-2009, 07:39 PM Thread Starter
WRXtuners Member
 
Join Date: Jul 2009
Location: Michigan
Posts: 2
Ross1 is an unknown
I am almost certain the timing belt is on right, I printed a thread on how to replace a timing belt and everything went very well. Also when I keep it at a low idle is sounds like there is a boost/ vac leak near the turbo inlet, but when I raise the rpms it seems to go away. Not to sure about this going to look into it tonight. Thanks
Ross1 is offline  
post #5 of 5 Old 09-14-2009, 07:43 PM
WRXtuners Member
 
ratfink's Avatar
 
Join Date: Oct 2008
Location: Idaho
Posts: 518
ratfink is a helpful contributing member
A large vacuum leak could definitely cause some problems. It goes away at higher rpms because the motors vacuum goes down the faster it turns.

Brad

AEM CAI, Perrin ELH wrapped, Catted Downpipe, Stage II XPT tune, K4RT30Y STS, lip, shark fin
ratfink is offline  
Sponsored Links
Advertisement
 
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 Off
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome