I have a 2001 Toyota sienna that is coming up w/several misfiring codes. The first time we had it read it had misfiring codes of p300, 301, & 302. We changed the spark plugs. It still wasn't working right so we changed one coil, and had it read again. Now it comes up w/ 300, 301, 302, and 306. The check engine light goes between on and blinking on and off. Do you think this is just a coil problem and I need to replace more coils. Am I reading the manual wrong for which ones to change. We changed the front one to the left if looking at the engine from the front of the vehicle. I though I read that to be 2.

Hi All, I have a 97 Dodge neon in need of a head gasket. I'm not sure which motor it has. There were only two right? 2.0 and 2.4, does anyone have an idea of how many hours it will take to replace? I want to make sure the dealer isnt ripping me off. Thanks so much, Brian