My car starts and idols (not well) but loses all power when i put it into gear and attempt to accelerate.

You may have mixed the plug wires around. If they are correct Check to see if exhaust is coming out of the tailpipe. I suspect a clogged cat converter. If it just started coin this since you worked on the vehicle it most likely is something you have done incorrectly. Whether it be wrong brand/type of sparkplug used to the wrong gap on the plugs. You may have mixed the plug wires around. If they are correct Check to see if exhaust is coming out of the tailpipe. I suspect a clogged cat converter. If it just started coin this since you worked on the vehicle it most likely is something you have done incorrectly. Whether it be wrong brand/type of sparkplug used to the wrong gap on the plugs.