Idle Issues...? - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace

Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > General Forced Induction

General Forced Induction The place to chat about turbochargers, superchargers nitrous systems and custom engine fabrications.

Search This Forum | Image Search | Advanced Search    

LinkBack Thread Tools Display Modes
Old 08-25-2009, 09:15 PM   #1
Focus Enthusiast
Join Date: Dec 2006
Fan#: 42027
Location: Boonville, IN
What I Drive: 2002 Twilight Blue ZTS Sedan

Posts: 488
FF Reputation: 5 AcIdBuRn02ZTS Good Standing Member
Buy-Sell-Trade Rating: (1)
Idle Issues...?

Hey alls...

Specs on the car....
Zetec block - SVT internals - Zetec comp. ratio
Ported stock head
comp stg 2 cams
ported 00' manifold
deka 60# injectors
3" maf housing
custom turbo setup
battery relocated to trunk - optima red top... 2/0 weld lead cable from battery to dist. block under hood... same for battery to chasis ground and ps bracket to chasis ground... alt. to dist block is also the same...

Here is the problem... first start after turbo build...

cold start... it will idle high for a few seconds then start to idle down... once it idles down... it will hover around 1k for a minute or so... then idle down more... around 800-850... then all of a sudden the a/f gauge will peg lean and the idle rpm starts to jump around... then the a/f goes crazy (jumps from 12.-- to 19.--) tap the throttle and it will calm down for a few seconds and then the same problem... almost feels like the car is misfiring but its not throwing any misfire codes...

then once its warm enough to kick the fans on... things go really crazy... as soon as the fans kick on... a/f mix goes haywire and the car will hardly stay running....

im wondering what mechanical issues can cause these problems...? when the fans kick on... the lights on the dash dim for a second and the car will damn near completely stall and "----" appears on the wideband... then the dash lights brighten back up and the a/f comes down a little... but not much and continues to bounce around from 15-17... could the be a grounding issue? vac. leak?

what sounds more plausible?

I was having idle issues before I started the turbo build like this... I had assumed they where being caused by the alternator (idle voltage was dropping under 12v...) Ive sinced replaced the alt. with a high-output version from c-f-m and idle voltage stays above 14...

short term fuel trims during this period bounce between .95 and 1.0-

I had the engine down to the shortblock durring the build... swapped on a different cyl. head which I ported... and am using a different throttle body that didnt come with a gasket... so I had to make one...

im somewhat at a loss because this is keeping me from dialing the tune in.. where should I start?

any help would be appreciated...

2002 - Twilight Blue ZTS Sedan
Built Motor, Getrag w/ Quaife, Eibach Suspension, GT3071R Turbo.. Destroying Tires thru 3rd @ 10psi = Priceless. 20+psi soon to come.

1987 MKIII Supra Targa
AcIdBuRn02ZTS is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Old 08-26-2009, 07:10 AM   #2
Focus Fanatic
03OrangeSVT's Avatar
Join Date: Feb 2005
Fan#: 19169
Location: Piketon, OH
What I Drive: MINI Cooper S TURBO

Posts: 11,906
FF Reputation: 152 03OrangeSVT Excellent Standing Member 03OrangeSVT Excellent Standing Member
Buy-Sell-Trade Rating: (5)
pm sent
[B]1951 McCormick FARMALL M
2007 MINI Cooper S Turbo... new project car
1998 Chevy 3500 Ext cab, long bed, 4x4, duelly, turbo diesel
2004 Harley V-Rod.... sex on wheels
2011 Harley Electra Glide Ultra Limited
03OrangeSVT is offline  
    Reply With Quote Quick reply to this message

Bookmarks & Social Networks

Quick Reply

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What I Drive
Year, color, and model of your car. Example: 2003 Focus Centennial Edition Sedan
Your real name.
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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
(Hanging Revs)Fast Forward SVT Idle Air Restrictor focusfab SVT Performance (2002-2004) 33 06-27-2006 07:22 PM
2005 ZES Rolling Idle, Lack of Power jeeden General Technical Chat 2 08-29-2005 04:11 PM
car cant idle island_boy49 General Technical Chat 25 06-07-2005 03:07 PM
Idle control Valve? davetyson General Technical Chat 2 02-24-2005 09:09 PM
2005 Focus ST Driveability Issues? Dayna2.3 General Technical Chat 3 10-11-2004 03:01 PM

All times are GMT -5. The time now is 05:57 AM.

Copyright 2002-2015 All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum and Volvo XC90 Forum.


Search Engine Optimization by vBSEO 3.6.1