I recently replaced the map sensor on my engine. I turned it over, started it up and let it idle for about 15 minutes before shutting off. A few hours later I want to start it up, and nothing. It's got fuel, it's got spark and it turns over oh, but won't start. I don't even know where to begin. Any help on this would be appreciated.

 

The only thing I can think of is to check the connection. Hopefully someone can be of more help.

 

Are you seeing the injectors spray fuel into the throttle body while cranking or you have only verified it has adequate fuel pressure?

A couple of quick things to try would be to disconnect the MAP sensor and/or the ECM spark control circuit (black connector with a single tan/black wire on the main harness at the firewall - may be stuffed into the loom or wrapped in tape) and see if it starts.

If it starts with the new MAP sensor unplugged, I’d suspect the new sensor is faulty.