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Engine misfiring?

Tiny
JETER3
  • MEMBER
  • 2003 FORD TAURUS
  • 2.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I recently replaced my spark plugs and wires. However, my car is now misfiring when I have it in drive and I am stopped at a stoplight or stop sign. No problem going down the highway or interstate. Only when I am idling.
Monday, March 11th, 2019 AT 12:08 AM

27 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,833 POSTS
Hello,

It sounds like you have a vacuum leak. but to be sure please use this guide to fix the problem:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and this guide can help as well:

https://www.2carpros.com/articles/how-to-change-spark-plugs

Please run down these guides and report back.
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Thursday, July 16th, 2020 AT 1:03 PM
Tiny
JOANUNA
  • MEMBER
  • 1 POST
  • 2003 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 87,000 MILES
Can someone please tell me why when I slow down and the press the excelarator to go faster my car jerks, I took the car to tuffys who told me I needed a tuneup and a new filter which have been changed and I am still having the problem. Can someone help me.
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Have your idle air control valve tested and replaced if necessary, listen, everytime something goes wrong with a car the first thing an idiot says is; "you need a tune up" well thats not the problem all the time, have your IAC tested and we'll take it from there. It is possible you need a tune up but it could be a fuel injector as well we should run the codes to see what's going on first.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Please run down these guides and report back.
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
SHORTY428
  • MEMBER
  • 6 POSTS
  • 2003 FORD TAURUS
  • 80,100 MILES
I've been told that it may be the coil pack. Where is it located and is it difficult to replace?
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and check fuel pressure first before replacing any part.
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
SHORTY428
  • MEMBER
  • 6 POSTS
I've already scanned for the codes. They are Po301 and Po316.
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Both of the codes relate to the same thing, check cam position sensor, stuck open EGR valve, or blocked EGR passages. Also check fuel pressure. Fuel pressure should be 26-45 psi key on engine running
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
SHORTY428
  • MEMBER
  • 6 POSTS
I replaced the coil pack tonight and the car is running smoothly now! :)
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
JTYGRETT
  • MEMBER
  • 1 POST
  • 2003 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 51,000 MILES
2003 Ford Taurus is missing and going below 1 RPM while in drive, esp. With AC on. It vibrates a little like it is wanting to stall. The emissions light came on which explains nothing. Car is full of gas. Had car one week - please help!
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check engine light on may not mean a thing to you but its telling that you have a problem you need to scan it for codes that will identify and or point you to the troubled area is it due for tune up you may wants to check that check for a vacuum leaks too. These guides will help us fix it.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down these guides and report back.
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Saturday, January 16th, 2021 AT 9:22 AM (Merged)
Tiny
ONEREALIST
  • MEMBER
  • 3 POSTS
  • 2003 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 113,000 MILES
I have an 03 Taurus showing a PO103 and PO316 trouble code stored. The 103 is a missfire on cyl 3, the316 is a missfire below 1000 revs. What is the likely cause of these codes? How do I correct?
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
O.K. P0103 is MAF signal high most likely due to blockage clean MAF P0316 is missfire first 1K Use freeze frame to ID cylinder most likely MAF is causing miss so try cleaning clear codes drive see what resets.
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
ONEREALIST
  • MEMBER
  • 3 POSTS
My bad. It was not a PO103, but rather a PO303, and the 316 code was correctly. The 303 indicates a cyl 3 missfire, 316 is missfire below 1000 revs. So how should I proceed?
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Is there spark at plug? If yes maybe injector could try cleaner. What is cylinder compression?
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
ONEREALIST
  • MEMBER
  • 3 POSTS
Yes. As a matter of fact, you can rarely feel the misfire. Will check compression and try cleaner, should I re-set the code. Am try ing to get inspected to tag the car.
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
What happened did you clear code? Stay off? Got it inspected?
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
SRHILAI
  • MEMBER
  • 2 POSTS
  • 2003 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 88,000 MILES
My wife has 2003 ford taurus, runs fine except it idles so bad, like it wants to shut off, especially when it comes to a stand still. SES light came one, got it scanned with a missfire cylinder #3, code P0316. Did changed plug wires, swap injecters, checked MAF, Cranckshaft, camshaft, TPS, IAC. Please help
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi srhilai,

P0316 is actually for misfire on cylinder # 6.

For this model, it is different from others as P0316 is a Continous Memory DTC. Items to check would be :

1. Camshaft Position Sensor.
2. Low fuel, kless than 1/8 tank.
3. Stuck open EGR valve
4. Blocked EGR passages.
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
FORD03
  • MEMBER
  • 1 POST
I found the port 3 of the coil pack on my 2003 ford taurus was bad.

After replacing the coil pack the problem went away.

I also replaced the spark plugs and wire before replacing the coil pack without any results.
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)
Tiny
ELIZABETH HUSMAN
  • MEMBER
  • 2 POSTS
  • 2003 FORD TAURUS
  • V6
  • AUTOMATIC
  • 200,902 MILES
Car was running good and one day when I started it and put it in reverse it started to chug like the engine is jumping. When I put it in drive and start going it settles out until I have to stop at a light or stop sign then it chugs or like its jumping. Put it in park it is fine. Engine light came on and then went off for a day and then came back on. Not sure what it could be.
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Saturday, January 16th, 2021 AT 9:23 AM (Merged)

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