Motor is hard to start after warm up

Here's a few things to check:


Are you SURE it's flooding? Sometimes the fuel will evoparate from heat and/or the fuel bleeds back and has to re-prime the carb. Pull off the air cleaner and hit the throttle while looking directly down the barrels. If nothing sprays, your out of fuel. Have an assistant crank the engine, or you can jump the starter relay, and see if it pumps fuel while cranking. Start with a new fuel pump if this works and if there's no excessive heat happening.

Now if it's NOT starving for fuel, check spark. The coil and/or the ECU box are temperature sensitive. If either one is starting to go bad this is when it could happen. Also check to make sure the terminal plug on the ECU control box is firmly seated. I chased an intermittant no-spark condition for 2 days before I discovered a cracked terminal end in the plug that would spread when connected and cause NO CONTACT... THAT was a pain-in-the-***. If you have 12 volts at the coil and no spark, it's the coil. If improper voltage is present, check the ECU or the ignition ballast resistor. Fortunately Mopar distributors are pretty much bullet-proof. Rarely do the pick-up's go bad.

Don't forget the simple things too... Do you have a solid ground from the battery to the block and to the frame? Heat = Resistance.

Let us know where you end up as this will help someone else. And of course, if I missed something, someone else please drop your .o2.