Starting Problems w/ 89 MX-6 GT

Hey everyone. Lately I've been having problems starting my Mazda. I've replaced the battery, starter, and alternator, so it's none of those. In the mornings when I start the car it usually starts fine, but when I start it when I leave work, like today, it was rainy, it took forever to start it. I would turn the key and try and pump the gas, it took a long time for the engine to actually kick in, it would start to kick in, but the power wouldn't hold. After it starts, nothing is wrong with it, even when I let the engine cool it starts up fine, it seems like the only time it doesn't start is at work. If you have any ideas please respond. Thanks

sounds like u might have a partially blown head gasket bro.