I have a 1999 Jeep grand cherokee 4x4 with a 4.0L 6 cylinder. I am getting a strong smell of fuel at the front of the vehicle when the motor is turned off after being run. The problem started after doing a tune-up on the motor. (Plugs, air filter, fuel filter and oil change) The only code in the computer is for a speed sensor in the transmission. Have checked all the fuel lines and can find no leaks. Any Ideas?
Look for wetness at the base of each injector. If you don't find anything obvious, spray the engine with a soapy water solution, then run the engine and watch for bubbles. Don't overlook the fuel lines under the right side of the vehicle and between the engine and body.