Hi I have a 1985 245 turbo and it has been acting wierd. First I pulled my 5 month old plugs to find them white tipped. I looked this up and found that it could be a sticky valve, the wrong plug, or the wrong fuel mixture. I bought a air to fuel ratio guage that is connected to the O2 sensor. When the car is cold the car will not run smoothly until it warms up. I have to keep my foot on the gas and keep it a 1800 rpms until the engine is warm. Right before the engine gets warm enough the car makes loud clunking noises. Each time it clunks the air to fuel ratio gauge jumps into the lean section. When the clunking stops i can let the gas off.

Also when the car is accelerating up a hill or fast the car will studder between accelerating and not. I was wondering if one or both of these are caused by the valves sticking. Also could a bunch of crumpling vaccum hoses do any of this? Thanks ahead of time. I have been struggling with this problem for a year and I'm about to give up and sell the car because I don't have money to fix it. Please someone help me!!!

Charles 1985 245 turbo 133K