I have a 1988 Mustang LX with the 5.0L engine, AOD transmission. It is mostly stock with no real modifications, I am the original owner. I have been trying to figure out a problem that has me stumped. I do not like to buy parts and just throw parts at it trying to fix a problem. I parked the car back in the summer and it was running good when I parked it and it cranked easily when I would crank it and move it. Then one day I went out to move it and it cranked but did not want to idle unless I kept patting the gas. A few days later the thing would not start at all. I checked the fuel pressure and have 39 psi on the fuel rail. I checked the coil and I did not see any spark at the coil. On the primary side of the coil I had good voltage reading and a good signal, but my spark tester did not show any spark. The coil reads good with a multi-meter, and with a test light, but still no spark on the secondary. I went out there today after just letting it sit for about a month and I still was not getting any spark with my spake tester, so I tried to see if I had spark using a test light with a gap between it and the secondary connection of the coil and I got some spark, but it was not much. I put the coil wire back on the coil and the engine started but the idle was rough. I know that 15 or so years ago I had the distributor replaced because the pick up on it was bad and that may be what is causing the problems now. Has anyone ran into this kind of problem or know what to try, short of buying parts and hoping to get the right thing fixed? Any information is greatly appreciated.