Okay I have a 1991 Honda Civic 1.5 liter it's been having some trouble, at cold start it drives beautifully for about 8 to 10 miles and then when I warms up & the computer kicks on it completely bogs down Muffler gets loud you have to floor it and if there's a hill it won't do it. I took it to my friend mechanic he didn't want to work on it cuz he works on higher end cars he said it might be electrical I took it to another shop that charge me 400 something dollars and yet another mechanic charged me 700 it's still not fixed what they've done so far is put a knew distributor new wires new spark plugs new gaskets I put in a new O2 sensor now there was an original owner before me and her boyfriend works on the on the time he's got a wire coming from the back fuel pump hot-wired it comes up to the front but somehow it's pulled out and just sitting on the floor I don't know where to plug it and no one does the mechanics seem to believe it it's not part of the problem. I cleaned the throttle body I've checked all dad I can I need help. PS when it runs like that it can stall out but I unplug the wires from the map sensor and it runs much better without that plugged in but still gutless engine lights on and always has been since I've owned it it says 02 sensor and map sensor and control shift sensor but those have all been replaced. One last thing today I'm in Arizona it's hot as hell I didn't even get to drive it eight miles when I started it it was already running with the computer I wish I could just rip that computer out cuz it runs awesome when it's cold