Hi All, I have a 2003 Focus with a 2.0 Zetec engine on a 5 speed manual transmission. The car is a bit of a hybrid since the body VIN specified it came with the infamous "grenading SOHC" engine in it not the Zetec - one of the prior owners must have done the engine swap. The speedo (which 2010 Ford Focus Ignition Coil. Each 2010 Ford Focus ignition coil transforms low battery voltage into thousands of volts to activate the spark plugs and start combustion. Rough idling, reduced MPG, and weakened acceleration are common signs of worn-out coils, and problems with these parts can cause a Check Engine Light or starting trouble too. The 2000 Ford F-150 has 18 problems reported for engine blows sparkplugs. Average repair cost is $530 at 158,300 miles.
The 2012 Ford Focus has 1 problems reported for spark plug blew out. Average repair cost is $2,800 at 142,000 miles. I replaced the spark plugs in my wife's 2012 Ford Focus at odometer reading
Here is my recommend procedure in dealing with these Zetecs on plug changes: 1) ALWAYS use the Motorcraft platinum plugs and DO NOT regularly change them. Once every 50k miles is fine. That should work out to no more than 4-5 plug changes over the life of the engine. 2) NEVER change plugs on a warm head. Focus Mk II 1600 - water around spark pl. My wife has a Ford Focus mk II, 1600 engine. A recurrent problem is water getting into the spark plug "valley" and then when the engine has warmed up, causes one of the spark plugs to become non-operational (as opposed to mis-firing - 'cos it doesn't fire at all.) The rubber seals around the top of the
2012 Ford Focus Ignition Coil. Each 2012 Ford Focus ignition coil transforms low battery voltage into thousands of volts to activate the spark plugs and start combustion. Rough idling, reduced MPG, and weakened acceleration are common signs of worn-out coils, and problems with these parts can cause a Check Engine Light or starting trouble too.
Problem with Motorcraft spark plugs. I just made a 4.5 hr road trip and between Full and 1/4 of a tank I went 480km. I was very impressed with that and figure it would work out to something like 40 mpg (CDN). So before the drive back I installed new Motorcraft plugs and wires. They really smoothed the idle out but on the drive home from Full
Step 1: Open the Hood And Remove the Sparkplug Wire. Open the hood while the engine is cooled down. An active engine can take up to 30 minutes to cool down. There will be water around the well of the spark plug. Regardless, remove the spark plug wire. With your hand, grab the wire by the boot.
