2001 ford focus misfire cylinder 2

SOURCE: engine code p0307 cylinder #7 misfire

It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.

SOURCE: 2001 Ford Windstar runs rough.

remove the coil pack and look at bottom of it if it shows any cracks coil is bad very common on these vans if you have a noid light check for injector pulse on #4 if you have pulse and good blue spark most likely the injector is bad you have to remove upper plenum to get injectors out let me know how you make out

SOURCE: Misfire on a ford focus

yes if 1 and 4 are on the same coil pack, thats the place to start and i think thats your answer

Testimonial: "Many thanks for your reply."

SOURCE: 3.8 liter ford mustang idles rough, runs ok at 70

is there any ways to test the coil pack,to make sure is bad.
does anyone had a schematict of it.

Chris Weber

• 131 Answers
• Posted on Oct 05, 2010

SOURCE: My 2001 Ford Windstar has

You still need to replace the plugs and wires regardless of the visual appearance. If it persists then a compression test and fuel injector swap is needed. If it persists then more expensive parts and tests are needed to see if it s internal engine issue or lean running issue or clogged EGR port.