1991 Mustang LX 5.0 stalling and surging idle problem
My 91 5.0 the first time you start it will start to stall out unless you give it a little gas. Usuallly it fires right up and idles very nicely. Then it idles at very low rpm and sputters (best way i can describe it is it sounds like it has a cam but doesnt like its always at the point of stalling). Then after about 5 minutes the idle will slowly raise to normal stay there for about 30 seconds. Then it will slowly go back to low rpm and start sputtering again. Also the power of the motor is just not there anymore. One more thing i did run the battery dead a few weeks ago and have driven it very little since then. What do i need to be checking and looking for? Bad gas? Battery? Spark plugs?
BBK equal length headers, Summit Racing off road h-pipe, Flowmaster super 44 mufflers and tail pipes, UPR products CAI, BBK 76mm MAF, Trick Flow 70mm throttle body, Professional Products 70mm EGR plate, Professional Products Typhoon u/l intake manifold, March under drive pulleys,Ford Racing 3.73 gears, B&M shift kit.
Soon to come heads and cam. 17in. rims and 275/40/17 tires.