problems starting - Taurus Car Club of America : Ford Taurus Forum

05taurushelp · 11-13-2012, 12:41 PM

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.

Jeff K · 11-14-2012, 05:54 PM

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.

Breeves002 · 11-14-2012, 07:12 PM

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.

05taurushelp · 11-15-2012, 06:34 PM

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 · 11-17-2012, 08:32 AM

i had the cel tested and got the code PO420. what do you think the problem is?

JW657 · 11-17-2012, 01:37 PM

Quote:

Originally Posted by 05taurushelp

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.

Breeves002 · 11-17-2012, 02:14 PM

^
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...

behlinla · 11-17-2012, 06:34 PM

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).

11-13-2012, 12:41 PM	#1 (permalink)
05taurushelp Junior Member Member Number: 51186 Join Date: Nov 2012 Chapter: Northeast Drives: 2005 3.0 Visit: My Garage Posts: 3 Trader Score: 0 reviews Rep Power: 0	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.

11-14-2012, 05:54 PM	#2 (permalink)
Jeff K Technical Advisor Member Number: 11378 Join Date: Feb 2007 Location: Milwaukee, WI Visit: My Garage Posts: 4,022 Trader Score: 0 reviews Rep Power: 14	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 02 Pontiac Grand Prix GT 67 Honda 450 Super Sport - completely customized

11-14-2012, 07:12 PM	#3 (permalink)
Breeves002 The Big Cheese Member Number: 49890 Join Date: Sep 2012 Location: St. Louis, MO Chapter: Midwest Drives: 2008 Mercury Sable Premier Visit: My Garage Posts: 3,965 Trader Score: 6 reviews Rep Power: 10	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 2008 Mercury Sable Premier 2012 Kia Soul Base AT 1.6GDI Moved On: 2000 Sable LS Premium Duratec View what I have for sale: HERE ENTER NOW FOR May's WAGON ONLY CAR OF THE MONTH!! *CLICK HERE*

11-17-2012, 02:14 PM	#7 (permalink)
Breeves002 The Big Cheese Member Number: 49890 Join Date: Sep 2012 Location: St. Louis, MO Chapter: Midwest Drives: 2008 Mercury Sable Premier Visit: My Garage Posts: 3,965 Trader Score: 6 reviews Rep Power: 10	^ 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 2008 Mercury Sable Premier 2012 Kia Soul Base AT 1.6GDI Moved On: 2000 Sable LS Premium Duratec View what I have for sale: HERE ENTER NOW FOR May's WAGON ONLY CAR OF THE MONTH!! *CLICK HERE*

11-15-2012, 06:34 PM	#4 (permalink)
05taurushelp Junior Member Member Number: 51186 Join Date: Nov 2012 Chapter: Northeast Drives: 2005 3.0 Visit: My Garage Posts: 3 Trader Score: 0 reviews Rep Power: 0	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

11-17-2012, 08:32 AM	#5 (permalink)
05taurushelp Junior Member Member Number: 51186 Join Date: Nov 2012 Chapter: Northeast Drives: 2005 3.0 Visit: My Garage Posts: 3 Trader Score: 0 reviews Rep Power: 0	i had the cel tested and got the code PO420. what do you think the problem is?

11-17-2012, 06:34 PM	#8 (permalink)
behlinla Technical Advisor Member Number: 14275 Join Date: Dec 2007 Location: Wisconsin Chapter: Midwest Drives: 2006 Taurus SEL Visit: My Garage Posts: 5,637 Trader Score: 0 reviews Rep Power: 10	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).

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