Lately my car been spuddering at idle and I placed my hand on the muffler and it seem to push my hand away and then pull my hand back in. So I would let it sit for a while and the spuddering wouldn't suck my hand in anymore..Is something wrong with my engine? There no Cel light on...could it be a stuck valve, bent valves? The car compression btw is 200,140,145,200. I been trying to figure out what is wrong with the engine lately, but there is no signs of anything wrong except the occasionally spuddering at idle. And some days the exhaust would just flow smooth...Someone please help a brother out.

 

Have you replaced the cheap things , like :Fuel filter, Cap and rotor, Plugs. Compression isn't very uniformed either. What kind of car is this and what mods?