Car losses power when i give it gas
Hello, this is my first post and I hope someone can help. I have a 1990 IROC with a 305 TPI. When I give it gas it losses power, when I let off the gas it rev's up then drops back down to idle. I replaced the cap, rotor, plugs, plug wires, checked all vacuum lines for leaks, cleaned and oiled K&N air filters, put in a new O2 sensor and drove it for an hour. None of these things worked but I did notice that when the car is in park or neutral I can rev the car with only a slight hesitation at the start. When I put the car in drive and give it gas thatís when it losses power or dies.