94 Explorer has lost alot of power

[THSteve]

Have a question....Sometimes I'll be driving on the highway and all of the sudden when I hit the gas to accelerate nothing happens. The RPMs don't even go up. Sometimes I even lose speed unless I slowly give it gas. I have replaced all plugs/wires, and even the MAF sensor. Could it have anything to do with the throttle? Transmission? Any answers will help.

[Papercut]

Originally Posted by THSteve

Have a question....Sometimes I'll be driving on the highway and all of the sudden when I hit the gas to accelerate nothing happens. The RPMs don't even go up. Sometimes I even lose speed unless I slowly give it gas. I have replaced all plugs/wires, and even the MAF sensor. Could it have anything to do with the throttle? Transmission? Any answers will help.

If youve been on the road a while I noticed that the engine pings excessively and you are unable to accelerate up hills or with a load. Occassionally the check engine light goes on when this happens. I replaced the O2 sensors and it fixed the problem, good luck!