2003 Duratec Taurus Studdering, lethargic, and Burning oil. 157k miles - Taurus Car Club of America : Ford Taurus Forum
 
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post #1 of 6 (permalink) Old 11-07-2018, 07:33 PM Thread Starter
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I have had my 03 for a few years now and ever since I got it (30k + miles ago) it always felt tired/lethargic. I used to have a 96 Sable with the same Duratec engine and it had much more pep. My 03 also will stutter/hestitate after a complete stop (60% to 70% of the time especially when warmed up). I am trying to figure out why.

Over the past 3-4 years I have:
1) Replaced the coils and spark plugs (good stuff I think OEM)
2) Seviced the transmission in 2014 (guy said it was likely not a trans problem, but who knows).
3) Swapped the air filter and cleaned the MAF
4) Cleaned the IAC
5) Replaced the intake manifold gasket
6) Replaced the fuel filter
7) Kept up with maintence (oil/filter, brake changes)
8) Replaced the oil pan gasket
9) Added sea foam and fuel injector cleaner to the gas often (sometimes helped it a little, but only temporarily)

No check engine lights, just runs sluggish and studders. I am thinking it could be one of two things.

Maybe a vacuum leak (previous owner looked for one but could not find one). But I would think a vacuum would trigger a running lean check engine code. Also it does not idle poorly and has steady rpms

Or more likely it has bad fuel injectors, which I am considering replacing this week. On a side note it burns a good amount of oil so I hope it is not just dying. Just wanted to know what you all think, or if you had similar issues

Last edited by ryan94hs; 11-07-2018 at 10:47 PM. Reason: Wording
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post #2 of 6 (permalink) Old 11-08-2018, 08:48 AM
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Oil burning? I would check your plugs, not replace them, but check the condition, and also do a compression test. It almost sounds like the rings are stuck or worn creating a low compression thing.

Brian - Carpe Diem

2005 Mercury Montego 52k
2004 GMC Envoy XUV 182k
2001 Pontiac Aztek GT AWD 120K
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post #3 of 6 (permalink) Old 11-09-2018, 12:48 AM
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Sounds like a stuck PCV valve to me.


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post #4 of 6 (permalink) Old 11-09-2018, 10:57 AM Thread Starter
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Quote:
Originally Posted by TollKeeper View Post
Oil burning? I would check your plugs, not replace them, but check the condition, and also do a compression test. It almost sounds like the rings are stuck or worn creating a low compression thing.
Ill have to check them, I have a compression tester so Ill see if it has any issues when I open it up
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post #5 of 6 (permalink) Old 11-09-2018, 10:58 AM Thread Starter
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Originally Posted by ice445 View Post
Sounds like a stuck PCV valve to me.
How would I check this? I noticed the PCV hose was dry rotted a bit
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post #6 of 6 (permalink) Old 11-09-2018, 11:29 AM
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Quote:
Originally Posted by ryan94hs View Post
How would I check this? I noticed the PCV hose was dry rotted a bit
For all the work to check it I'd just replace it, get a Motorcraft one though. They're very inexpensive.


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