Idle Issues with no CELs on dash - 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    
FocusFest

Like Tree1Likes
  • 1 Post By sailor
Reply
 
LinkBack Thread Tools Display Modes
Old 04-03-2017, 11:38 AM   #1
Focus Rookie
 
Join Date: Apr 2017
Fan#: 349714
Location: West Point, VA
What I Drive: 2000 Ford Focus ZX3

Posts: 3
Points 11, Level 1
Points: 11, Level: 1 Points: 11, Level: 1 Points: 11, Level: 1
Level Up 21% Completed
Level up: 21% Level up: 21% Level up: 21%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 portert0224 Good Standing Member
Buy-Sell-Trade Rating: (0)
Idle Issues with no CELs on dash

I have a 2000 Ford Focus ZX3 Ztech. I've only owned it for a couple of months and only have a couple thousand miles on it since I purchased it with 238k miles on it. When I bought it, it needed a fuel pump and fuel filter because it had been sitting for about 3 years and the fuel in the tank shellaced, but the car ran flawlessly after that and got up to 34 mpg.

It started running rough at idle about 2 weeks ago, but it would start and run. No CELs in dash. I found the PCV hose was deteriorated and collapsed behind the throttle body. I replaced the PCV and line to TB, cleaned MAF sensor, air box, etc.

This did not cure the rough idle--it actually made it worse--hard start without pushing down gas pedal and won't run at all unless you hold it in the 3,000+ rpm range. Let off down to 2,000 rpm and it idles rough and dies. I sprayed the TB with carb cleaner to ensure the butterfly was not sticking, which it does not appear to be sticking.

I then suspected the air idler control valve (based off what I found on the Internet). I attempted to reach the air idler control valve, but I don't have a 12-year old hands and cannot reach it without removing all of the emissions lines to the EGR valve, the EGR Valve and the EGR valve bracket.

I've also read on the internet other possible culprits with the EGR, EVAP canister, EVAP canister vent solenoid, DPFE sensor, vacuum sensing valve, etc.

With the goal of avoiding the dealership, my questions:

1. If I have no CELs and I purchased an OBD II reader, would it give me a code to diagnose if any of the aforementioned parts have failed or need to be replaced? I don't want to take it to the dealer to pay $100 to diagnose if it is something I can do myself.

2. Will an OBD II tell me if the air idler control valve is bad? If so, I will take it to the dealer to repair that since I cannot reach it without disassembling the emissions parts to reach it.

Thanks in advance,
Tracy


portert0224 is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-03-2017, 12:45 PM   #2
Old Phart
 
sailor's Avatar
 
Join Date: Jun 2008
Fan#: 57268
Location: Lockport, NY
What I Drive: 2013 Black 5-spd SE Hatch

Posts: 44,596
Points 33,746, Level 100
Points: 33,746, Level: 100 Points: 33,746, Level: 100 Points: 33,746, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 21%
Activity: 21% Activity: 21% Activity: 21%
FF Reputation: 135 sailor Excellent Standing Member sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
Code reader/scan tool can read codes that are NOT lighting the CEL (pending/inactive types) but it can't read what isn't there yet. Not all faults are possible to detect by that system, including the IAC not working properly as long as it's still OK electrically.

Fuel pressure CAN be checked by a scan tool, and since you didn't mention whether the whole pump assy. was replaced that could easily be your problem.

As far as reaching the IAC, it's necessary to do so from underneath and do it by feel.


There are many other possible issues at that mileage, including jumped timing from an old belt. Compression test would give a good idea of basic condition, and could point to a timing issue without deeper investigation to prove it's correct. At that mileage it's due for it's 3rd or 4th belt/tensioner/pulley kit, depending when prev. replaced.
portert0224 likes this.
__________________
"Rubber Side Down"

S.R. #275
Focus Takeover #003 / Tarbo Fan #003
sailor is offline  
    Reply With Quote Quick reply to this message
Old 04-03-2017, 02:34 PM   #3
Focus Rookie
 
Join Date: Apr 2017
Fan#: 349714
Location: West Point, VA
What I Drive: 2000 Ford Focus ZX3

Posts: 3
Points 11, Level 1
Points: 11, Level: 1 Points: 11, Level: 1 Points: 11, Level: 1
Level Up 21% Completed
Level up: 21% Level up: 21% Level up: 21%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 portert0224 Good Standing Member
Buy-Sell-Trade Rating: (0)
Thank you. I am borrowing a scanner from a friend tomorrow. I hope to narrow down the problem.
portert0224 is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
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
Name
Your real name.
City
State
Country
Insurance
Please select your insurance company (Optional)

Log-in


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



All times are GMT -5. The time now is 05:07 AM.


Copyright 2002-2015 FocusFanatics.com. All Rights Reserved : : 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