542 - Fuel pump circuit failure
543 - When the PCM commanded the fuel pump on, voltage was not detected on FPM
when chek the timming you have to pull the spout connector or the timming will be jumping all around Checking, Setting and Bumping up your Mustang's Timing
i would say check the connnections for the fuel pump and the grounds
i think your fuel pump is on its way out, get a fuel pressure guage and test the psi at idle with the vaccum line of the fuel pressure regualtor should be around 39psi
__________________ 1987 Mustang LX 5.0 5-speed,white with smoke grey interior,MAF conversion,Perfection clutch(valeo)2.5inch Ravin exhaust, subframe connectors, ported lower intake & heads 1994 F-350 dually crew cab,green on tan leather,460,C6,k&n intake,msd coil, BANKSsystem,9mm wires,bosh platinum plugs |