ecsw

I have a 2002 ford taurus 24v with 56,000 miles on it. About a month ago it started to have a miss at idle very faint with the a/c off but more prominant with the a/c turned on. It threw a code for a cylinder 1 misfire. I replaced the IAC and it still was acting up so i replaced the plugs and wires. It now has the miss at idle whether the a/c is on or off but is not throwing a check engine light.

Any ideas?

ecsw

just had my mechanic check for codes... Its showing a cylinder 1 misfire. Also showed code P0316....any ideas?

SHOZ123

Has the MAF been cleaned lately?

ecsw

cleaned the maf.. Still has the misfire. If i drive it around with the a/c off the check engine will go out after a few days. As soon as i turn the a/c back on the misfire gets worse and the light comes back on. Just drove it on a 400 mile trip with no a/c and it ran fine except for a slight miss at idle once in a while but didn't trip a code.

SHOZ123

Need to look at the coil then.

ecsw

how do i test the coil?

SHOZ123

Look at the bottom and all around the sides for some small cracks.

tbird100636

You can also using a spray bottle squirt the coil gradually with water while the engines running. If you start seeing an electrical light show around the coil and the engine starts running rough and/or stalls you have a bad coil.

__________________
Master ASE Certified L1 Chrysler Technician- still a Ford fan at heart.
1964 Thunderbird Hardtop- Chantily Beige- 390 FE 4V V8-Uncle's Car
1966 Thunderbird Convertible- Red- 390 FE 4V V8- Uncle's other car- waiting for paint and body work!!!
1967 Mustang Convertible- Blue- 289 V8- helping a friend re-assemble this classic