3.1 no start

[howada]

I have a 1995 Grand Am with a 3100 V6 that I have just replaced with a used 3100. I was told it was out of a 1995 grand am and everything should be fine to swap.

After swapping the engine the only difference I found was the lenght of the wiring from the camshaft sensor, it was too short and would not reach the firewall plug. I ended up removing the camshaft sensor from the original engine and installed it.

My problem is I have a no start condition, when cranking the engine sounds like the timing is off. Backfires though the intake and stinks but will not start?

If anyone has any information to help I would appreciate it.
By the way, I did hear the used engine run prior to purchasing it and it ran good. I also installed intake gaskets on it prior to installation along with replacing the rod & main brgs.

[CDR Speed]

Well, you could have a timing problem, but to make sure they didnt sell you some bunk crap, take a compression check and make sure all the valves are holding. What CAN cause the backfire through the intake is a bent intake valve. Not saying it is, just a possibility. Another thing is to hook the car up to a diagnostic tool that has graphing capability or can give you real time data. What that would tell you is wether or not the crank and cam triggers are working correctly, and if not, wich one isnt and possibly why it isnt (i.e. loose or broken wire, short in circuit, faulty sensor, etc.). Another thing the diagnostic tool will tell you is what the computer is setting the timing to in °. For instance, if the computer is setting base timing to 30+°, then you know it's getting a faulty reading somewhere, or the computer is out to lunch completely. Anyways, PM me or post any more questions you got, i'll be glad to do what i can to help you out.

[4kQuad]

Possably if the wire was a different lenght, then maybe some thing inside the sensor was different also. Because computers think so fast now days, the extra lenght in the wire ( not that I really think so) could be changing what the computer thinks its getting.

what you describe is like timming.