engine problems

My 99 Bonneville se has been having issues with the cold, anything under 25 degrees it doesn’t tend to run correctly. It’ll run really rough unless i stay on the gas and hold it at about 1500 rpm’s. It’ll eventually smooth out after about 5 mins. I assume these issues are tied together. The main...

My 2002 Grand Prix Gt has 112k miles and has started to jerk violently under heavy acceleration the rpms will drop to about 500 then rise up to about 2,000 rpm and this jerks the car really bad, i believe i have a cracked intake manifold i don't know if that could cause this problem or not if...

Hello, My 2006 Grand Prix will not accelerate over 10 mph. It is displaying " Reduced engine Power". It will also turn off several times while slowing down when I push the brakes.