Re: hot engine hard starting

Posted by Marty or Marston On 2016/7/8 2:25:49

You don't want to use distilled or deionized water in your system. Being in the Houston area where you don't need to worry about freezing, you could switch from antifreeze coolant to a product like No-Rosion and purified water (which has low calcium
and magnesium but some minerals). Water has about two times the heat removing ability versus a 50:50 glycol:water system.

Since your car starts fine and runs good when hot, two biggest areas of problem would be either fuel or spark.

1) Remove your air cleaner when it it how and see if it getting gas.
2) Check spark when it is hot and compare it when engine is cold.

If the spark is weak when hot, check all connections that are involved in the "Spark Plug" realm to ensure that they are clean and tight and that the coil wire is in great shape. Cleanup your points with a points file and regap if necessary. Clean the post inside the distributor cap and the rotor. Wipe the inside of the cap to ensure that there is no electrical conducting dust inside the cap (e.g. carbon). If you still have a problem replace the coil.

Note: you may just want to do all of the steps in the above paragraph (except replace coil) as a good maintenance on your car.