1988 F150 XLT Lariat, 2 wheel drive 302. Started stalling and dying at lights or low RPM. Replaced, MAP, distributor cap and rotor, new plugs. Check fuel filter, getting plenty of fuel, just cranks but will not fire. Replaced the fuel relay about 2 weeks ago, truck ran great. Out of ideas and really cannot afford to many more mechanic and tow bills. Please anyone have any ideas. Thank you

 

First thing to do is check for codes. Don't pull the battery cables as this will lose any stored codes.

Is the check engine light on? Has it been on and/or flashing recently?