problems starting - Taurus Car Club of America : Ford Taurus Forum
 
LinkBack Thread Tools
post #1 of 8 (permalink) Old 11-13-2012, 12:41 PM Thread Starter
Junior Member
 
Join Date: Nov 2012
Chapter: Northeast
Posts: 3
Rep Power: 0
 
Trader Score: 0 reviews
problems starting

i have an 2005 taurus i had the starter and fuel filter done about a year ago and the fuel pump done recently. my car is having problems starting , there is definitely power it was just turn over and wont catch. sometimes it will start right up but if i shut it off it wont work 1 minute later. could it be the crank sensor? im just having problems diagnosing the problem.
05taurushelp is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 11-14-2012, 05:54 PM
Technical Advisor
 
Join Date: Feb 2007
Location: Milwaukee, WI
Chapter: Midwest
Year: 2005
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 5,761
Rep Power: 71
     
Trader Score: 0 reviews
Does the CEL come on with key in RUN? If so, does the CEL go off when cranking? It it goes off, the crank sensor (CKP) is not the problem.

Have the battery load tested. 04+ are especially sensitive to low crank voltage.

05 Taurus SEL Duratec - my daily driver
04 Taurus SES Duratec - wifes car
95 Taurus GL Vulcan winter car
Toy #1 - 86 Tbird 5.0 (original owner) - LOTS of mods
Toy #2 - 88 Tbird Turbo Coupe - LOTS of mods
67 Honda 450 Super Sport - completely customized
Jeff K is offline  
post #3 of 8 (permalink) Old 11-14-2012, 07:12 PM
Sam
breeves002

 
Sam's Avatar
 
Join Date: Sep 2012
Location: St. Louis, MO
Chapter: Midwest
Year: 2008
Model: Mercury Sable
Engine: 3.5L Ti-VCT V6
Posts: 6,553
Rep Power: 93
       
Garage
Trader Score: 8 reviews
I thought I replied to this when you posted it. If you have a scan tool that can check the fuel pressure, check it. It's possible you have a bad pump again. It does happen. Do the test that Jeff says though to see if its the CPK.

Sam

GET YOUR 2015 TCCA SHIRT HERE:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


2008 Mercury Sable Premier
2014 Ford Focus Electric
1997 Mercury Grand Marquis GS
1991 BMW 850i E31 M70 V12
Moved On: 2000 Sable LS Premium Duratec
Sam is offline  
post #4 of 8 (permalink) Old 11-15-2012, 06:34 PM Thread Starter
Junior Member
 
Join Date: Nov 2012
Chapter: Northeast
Posts: 3
Rep Power: 0
 
Trader Score: 0 reviews
thanks for the replies,
the CEL does come on with key in run, and does go off when cranking.
i will get the cel tested tommorow

thanks again
05taurushelp is offline  
post #5 of 8 (permalink) Old 11-17-2012, 08:32 AM Thread Starter
Junior Member
 
Join Date: Nov 2012
Chapter: Northeast
Posts: 3
Rep Power: 0
 
Trader Score: 0 reviews
i had the cel tested and got the code PO420. what do you think the problem is?
05taurushelp is offline  
post #6 of 8 (permalink) Old 11-17-2012, 01:37 PM
Cake monster

 
Join Date: Mar 2009
Chapter: Northeast
Posts: 1,581
Rep Power: 21
 
Trader Score: 0 reviews
Quote:
Originally Posted by 05taurushelp View Post
i had the cel tested and got the code PO420. what do you think the problem is?
Catalyst System Efficiency Below Threshold (Bank 1)

It could be a bad oxygen sensor, or maybe a bad cat? I don't know much about that stuff.

I love cake. I AM THE CAKE BOSS!

JW657 is offline  
post #7 of 8 (permalink) Old 11-17-2012, 02:14 PM
Sam
breeves002

 
Sam's Avatar
 
Join Date: Sep 2012
Location: St. Louis, MO
Chapter: Midwest
Year: 2008
Model: Mercury Sable
Engine: 3.5L Ti-VCT V6
Posts: 6,553
Rep Power: 93
       
Garage
Trader Score: 8 reviews
^
That would be my guess. Either a bad O2 or bad Cat....

One thing I've heard people do is use a 93 octane or higher fuel and sometimes it helps get some crap burnt up. Heard seafoam works too. This seems like a bigger problem than starting problems...

Sam

GET YOUR 2015 TCCA SHIRT HERE:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


2008 Mercury Sable Premier
2014 Ford Focus Electric
1997 Mercury Grand Marquis GS
1991 BMW 850i E31 M70 V12
Moved On: 2000 Sable LS Premium Duratec
Sam is offline  
post #8 of 8 (permalink) Old 11-17-2012, 06:34 PM
Technical Advisor
 
behlinla's Avatar
 
Join Date: Dec 2007
Location: Wisconsin
Chapter: Midwest
Posts: 7,539
Rep Power: 84
      
Trader Score: 0 reviews
A bad O2 sensor will not prevent the car from starting since they aren't used until the engine has warmed up. A bad catalytic convertor is a possibility only if it's blocking the exhaust. Does the car have normal amount of power when the engine is warmed up?

Like others have said, start by making sure the battery is good (load test the battery or try jumpstarting it). Otherwise the next thing I would check is the fuel pressure. Your fuel pump might not be working every time (they tend to cause intermittent no-start issues).
behlinla is offline  
Sponsored Links
Advertisement
 
Reply
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Taurus Car Club of America : Ford Taurus 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:
OR

Log-in









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
Show Printable Version Show Printable Version
Email this Page Email this Page



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

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