Engine misfiring?

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.

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.

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.

I've been told that it may be the coil pack. Where is it located and is it difficult to replace?

scan for codes and check fuel pressure first before replacing any part.

I've already scanned for the codes. They are Po301 and Po316.

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

I replaced the coil pack tonight and the car is running smoothly now! :)

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!

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.

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?

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.

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?

Is there spark at plug? if yes maybe injector could try cleaner. What is cylinder compression?

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.

What happened did you clear code? stay off? got it inspected?

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

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.

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.

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.

The most common suspect is a simple engine misfire due to worn spark plugs and wires. Ford has also had more than their share of failing ignition coils.

The place to start is by having the diagnostic fault codes read and recorded. The people at many auto parts stores will do that for you for free. If the code relates to a misfire, the code number will indicate which cylinder is responsible, but it will not say why. Be aware that fault codes only indicate the circuit or system that needs further diagnosis, or the unacceptable operating condition. They never say to replace parts or that one is bad. They may try to sell you parts at the part store, but they will only be right about half of the time. First your mechanic will rule out wiring, connector terminal, and other problems before suspecting a part that might be referenced in a fault code.

Thank you i will do that and see what happens. it is now like the engine is jumping when going up an incline.

Please let us know what happens so it will help others

Best, Ken

The codes say lack of ho25 single low input second one is missing first cylinder third one is mis firing the first 1000 resolutions.can't figure out what they mean is it timing or spark plugs

code numbers never identify bad parts just failed systems.

the coil is the most common failure for the first 1000 code. plugs and wires would be a good start.

Roy

Thank you will try that do you know how many coils are in the 2002 ford taurus se 3.0 v6?

one coil in the back if it is a dohc. if it is not the dohc, it is on the front valve cover

Roy