Help me diagnose this engine problem? - 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 Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 01-30-2013, 04:51 PM   #1
Focus Enthusiast
Join Date: Apr 2012
Fan#: 97620
Location: Battle Creek, MI
What I Drive: 2004 Twilight Blue ZTS, 2.3L PZEV

Posts: 71
FF Reputation: 1 JakeTheSnake Good Standing Member
Buy-Sell-Trade Rating: (0)
[SOLVED] Help me diagnose this engine problem?

2004 ZTS Sedan, 2.3L PZEV, auto-trans

A couple weeks ago I did the Stealth CAI mod based on BlazingCopper's writeup here:

It has been great!

However just today I fired up the car and it was sputtering & puttering - and the Check Engine light started BLINKING. I had not left the driveway, so I pulled it into the garage, shut it off, and looked up the blinking. A misfire condition... great. :(

I checked when I last changed the spark plugs - over 40k miles ago. I had a box of Autolite XP103s on hand, so I checked the gaps at .050~.055-ish, disconnected my battery, and installed the new plugs.

I reconnected the battery, fired it up - no Check Engine light at all - not solid, not blinking. I let it idle for a few minutes, then drove it to my nearest Advance Autoparts. It still had the sputter during the drive, but no Check Engine light, there & back round trip about 8 miles.

The guy at Advance plugged into my diagnostic port - no static codes (I had cleared them evidently when I disconnected the battery) and the live data all checked OK with the car sitting, at idle and held at 3k rpm for a minute or so.

He asked me to pop the hood with it running, and he stated it sounded like something was sucking air where it shouldn't - a vacuum line, intake manifold, etc. I noticed the hissing too - it seems to be coming from the passenger side of the engine compartment, so I guess it's not the sound of air moving thru the new Stealth CAI setup.

I took these three videos when I returned home, idling in my driveway.

Inside the car watching the tach:

At the tailpipe - oh yah sputtering!

Hood up, engine compartment:

Any ideas on what I should do next?



Last edited by JakeTheSnake; 02-02-2013 at 02:44 PM. Reason: Changed title to indicate problem solved
JakeTheSnake is offline  
    Reply With Quote

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:


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

Forum Jump

All times are GMT -5. The time now is 03:14 AM.

Copyright 2002-2014 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 Audi S3, Ford Fusion and Acura TLX. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. Challenger Hellcat - Charger Hellcat