Well, I changed three of the plugs, 4-5-6, which I'm sure you know are just under the engine cover. My misfire codes were only on cylinders 4 and 5, so I wasn't going to tackle the intake manifold for plugs 1-2-3 just yet. I will have to see if the misfire issue returns when the weather is wet again.
Onto the low power issue, when I started the engine cold, I looked under the vehicle, and I could see exhaust steam coming from under the engine, I am assuming there is an exhaust leak at or right around the manifold area. Am I correct to assume this is where I am losing power due to lost compression, and where I am hearing the loud 'whooshing' sound when I push on the gas? It seems the sound is right behind my dash/firewall, so that would put it right at the manifold area.
Again, thanks for your help.
Saturday, December 4th, 2010 AT 8:38 PM