i juts replaced ane of the heads on my 2.8l i changed al the gaskets on both sides and made sure i bought new on everything when i started it back up i t idles at 4k rpms so i shut the car went through all the vacume hoses changed them all made sure they all went where they where supposed to turned it back on and now it jumps was wondering if you guys had any ideas and could tell me exactly what plug is the maf thank you