Hard Start, Black Smoke

Hello out there. Hopefully someone can help me with this problem. My 99 aurora starts hard. It will start after about 5 or 6 seconds. If it doesn't it sounds like it backfires, but when i try to start it again it will start up after about 2 or 3 more seconds of trying. When it starts black smoke comes from the tail pipe and it smells like fuel(real rich smell). The smoke only comes out when it is initially started after that it runs good. It doesn't bog down or hesitate at all. Black smoke does not come out during normal driving, but if you were to mash on the gas while driving you will get a puff of black smoke. Also you can hear the engine idling between 1000 and 1500 rpm(it never seems to level out). There is no check engine light. I've changed the plugs, fuel filter, I've added marvel mystery oil to my gas. Can someone shed a little light on this headache.

Thank You

You probrably have a busted fuel pressure regulator. Pull the vacumm line off and if fuel comes out that's your problem.
Carman999

:grinyes: Wow thanks a million. It was the fuel pressure regulator. I really appreciate the feedback so quickly. I cant believe what a difference the part made. The car starts right up.

Thanks again!!! :grinyes: