2004 Mercury Monterey Q&A
2004 Mercury Monterey Question: Van backfiring after changing coil pack.
Most likely they are crossed! OLD COIL PACK IS NUMBERED, look at it!! Now, looking at the enging while standing in front of van, the cylinders back near the windshield are,1-2-3 from your left to your right. ------The cylinders up front near you are 4-5-6 from your left to your right! Put them on the new coil pack at the proper position according to the old 'numbered' coil pack! - pushrod