need help ASAP...PLS..

[oneslik5o]

Keep getting a service engine soon light coming up on the dash of my 2001 GT. My mechanic read the code and it says it is a misfire. I have put new plugs and boots on the coils, to no avail. The misfire is always a different cylinder. Car has catback, cold air and pulleys, and only has 10,000 miles on it. It does feel like it's running out of power at times too. I am out of ideas, can anyone point me in the right direction to fixing this?? please.

 

[02GTKB]

still under warranty? if so let them figure it out

 

[blackink00]

+1

 

[98MACH1R]

had the same prob it would be random cylinders i changed the wires and problem solved

 

[COramprat]

01's have cops so the plug wire idea is out. How many times have you gotten a misfire? Did any moisture (such as a bad rain storm) get onto the engine?

 

[willit]

I am currently going through the same misfire problem. My 03 GT has the SES light flashing when I downshift (4-3, 3-2) and the motor is running about 2500 rpm. I brought the car in once for random misfire code, and they replaced one plug and COP under warranty. The repair worked for about 1 week, problem has returned again. I even drained the gas tank, thinking I had a bad batch of gas... currently running 93 octane Mobil with a mild octane booster..... still have the code flashing.
A local Ford mechanic hinted the 4.6 2v has a notorious problem with the COP's... boots, cracks in the boots. Any ideas?

 

[tomustang]

maybe your predator is doing that.

 

[Shiroelex]

Replacing the boot isn't going to do you much good, if the coil has already been damaged by moisture. I'd get the codes as soon as they come up, check which cylinder(s) are misfiring, and replace the COPs. I had the same problem on mine, and it turned out to be cylinder 1 taking a crap. About a month later, I started to notice the problem again, so I went to Autozone and bought 7 more, and replaced them all. I know, they are pricey, but I got a discount. No problems since then. A good idea would be to check the plugs on the cylinders that were misfiring, as they could be nasty already. Be sure to shoot some sir down into the plug well first, before taking the plug out, to prevent any debris from falling down inside the cylinder. Another good idea would be to squirt a fair ammount of dielectric grease up each plug boot before popping them onto the plugs. That holds out moisture, assures good connectivity, and prevents corrosion. Reset the PCM for poops and giggles, and good luck!