Car wont start, Gas in Oil...PLEASE HELP???

[ComfortablyDumb]

My son has a 95 lumina with a 3.1 engine. He just replaced the engine with one from a Cutlass Calais (sp?) His car ran fine for a few days after engine replacement, then began to act like it was missing and chugging and sputtering and stalling. Finally it died and wouldnt start back. A friend of his said he thought it might be the ignition control module, and he had a wrecked car they could take one off to try. They put the new Ignition control Module on today and the car started but still was missing and sputtering terribly. About 100 yards from the house the car died again and now will not start again.
There is a small amount of gasoline in the oil, which we were told could have run down the pistons if it wasn't firing.
When we take out a spark plug it has gas on it, and when we push that little valve thing on the fuel rail gas squirts out. When you turn the key on you hear he fuel pump kick in.
Does anyone have any ideas or tips for us.
Any and all help will be GREATLY appreciated, as neither of us knows much at all about car repairs.

[richtazz]

First, check the vacuum line to the FPR to see if there is gas present. If so, then the regulator has a bad diaphram and need to be replaced. Next, make sure you have the right engine. GM used two versions of the 3100 in 95. One had roller rocker arms, the other has ball and socket rocker arms. They are enough different to cause issues like you're describing.

[ComfortablyDumb]

Thank you for the advice, I am going to autozone.com to see if I can locate where the FPR is on his car. I will let you know how it goes. Once again. THANK YOU

[ComfortablyDumb]

I am sooooooooooo lost I cant find the FPR, and the component location section of autozone.com doesnt show anything. PLEASE if you have time PLEASE explain to me where it is?? Thank you so much.