Recently just got 91 trooper 2.8l and have been having problems with high idle (only sometimes) running extremley rich and seems to have very low power. I have replaced injectors, plugs and wires cap and rotor coil, Throttle position sensor, engine coolant temp sensor and air filter. Was wondering if there is really a MAF sensor and if there is what is its location I keep reading there is on ]e and some say no there isn't. When i open the fuel cap there is more pressure in it than i have ever heard in a tank and even after sitting overnight. I think thats all i have noticed problem wise will add if remember more