Engine Hesitation between 30-40 mph - Taurus Car Club of America : Ford Taurus Forum
 
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post #1 of 9 (permalink) Old 04-07-2011, 07:08 PM Thread Starter
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Engine Hesitation between 30-40 mph

My 03 SEL with the tec (52k miles) has seemed to develop a hesitation/bucking when I'm driving between 30-40 mph and give it about 1/2 throttle.
The car bucks and hesitates, but never stalls.
It happens about 1/2 the time in this situation.
I hoping its not the transmission (changed out the fluid at 30K) as the car seems to shift normally.

I've cleaned the MAF but have not done anything else.

Could it be the fuel filter (never changed) or what do you think??
Thank you in advance!!

4 Taur Family:
98 Comfort DOHC
00 SE
03 SEL Premium DOHC
04 SES Sport DOHC

2003 SEL Premium
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post #2 of 9 (permalink) Old 04-07-2011, 10:05 PM
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Any codes?
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post #3 of 9 (permalink) Old 04-07-2011, 10:29 PM
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How do the wires and coil pack look?

--Nick
-'66 Ford Country Squire wagon 390/C6
-'87 & '89 Mercury Colony Park wagons 302 EFI/AOD
-'90 Lincoln Town Car 302 EFI/AOD
-'03 Lincoln Town Car 4.6L/4R70W

former '87 Taurus 3.0 GL sedan, '87 Taurus 3.0 GL Wagon, '97 Taurus SHO 3.4 V8 sedan, '00 Taurus SEL 3.0 24V
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post #4 of 9 (permalink) Old 04-07-2011, 10:55 PM
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Check for any pending codes. Could be a clogged converter (often the downstream converter clogs first).
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post #5 of 9 (permalink) Old 04-07-2011, 10:56 PM
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Start simple. Try changing the fuel filter. I change mine every 15,000 miles. I believe the basic recommendation is every 30,000.
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post #6 of 9 (permalink) Old 04-08-2011, 05:40 AM Thread Starter
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Join Date: Aug 2004
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No codes.
Is any fuel filter OK or should I get a motorcraft one?

4 Taur Family:
98 Comfort DOHC
00 SE
03 SEL Premium DOHC
04 SES Sport DOHC

2003 SEL Premium
Every available factory option
September 2009 Car of the Month

Dealing in Mach Audio Systems for over 10 years with perfect feedback. I'm happy to answer any/all questions.
I have many very satisfied club members!
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post #7 of 9 (permalink) Old 04-08-2011, 07:28 AM
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I had a buck and a jerking in my 03 taurus and a new syncro with a new cam sensor fixed my problems! I had no codes either!
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post #8 of 9 (permalink) Old 04-08-2011, 10:08 AM
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^ Hes got a tec. I would use any parts store brand. Dont think the mc would matter here or be worth the diff. in price. An ignition misfire light may rear its ugly head later.
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post #9 of 9 (permalink) Old 05-03-2016, 09:44 PM
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Thumbs down same hesitation problem 2003 DOHC

I have the same hesitation problem. I,ve changed plugs, spark plug wires , new coil pack ,cleaned the IAC, replaced lines and rubber fittings from pcv valve and the oil breather lines from the valve covers, checked the fuel filter and still haven't found the problem. is there something else? it does this intermittently and never throws any codes.

Last edited by pancake; 05-03-2016 at 09:55 PM.
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