no start

[Snoop dogg]

Hey need some help here I have a 02 grand Prix se and I just did a LIM gasket and now the car won't start and when I try to start the car it back fires out the intake any one know what I did wrong

 

[Fivefingerdeathpunch]

WRong order on the plugs wires is my guess and unplugged injectors.

Front is 1,3,5, rear is 2,4,6.

 

[Scottydoggs]

 

[Snoop dogg]

I have a Grand Prix SE with a 3.1 engine

 

[Fivefingerdeathpunch]

Plug order should still be the same for front and back, just something to double check.

 

[Scottydoggs]

popping out the intake is almost always crossed plug wires.

 

[tech3627]

I agree that spark plug wires installed on the wrong cylinder is the most likely cause of popping through the intake. The cylinder location on a 3.1 is different than a 3.8. The front bank is 2,4,6 and rear bank is 1,3,5. Here are some pictures from Alldata:

The other possibility is you did not put the pushrods in the correct spots. The intake pushrods are shorter than the exhaust pushrods.

 

[Fivefingerdeathpunch]

Hmm, the **** GM. Every other motor is 1,3,5 on the front bank or left bank lol.

 

[BillBoost37]

It's a 3.1 Cam.. on the GA's they made sure you couldn't see the coils well enough to notice..lol

 

[Sven the Sexman]

I've done one of these where the lifters wouldn't collapse when reinstalling the pushrods causing it to sound like no compression and popping out the intake. I ended up loosening up the rocker arms slightly which closed the valves, started the car, then torqued them down. Worked like a charm. This was my last resort stuff though. Obviously check the other stuff posted first.

 

[Sven the Sexman]

Snoop must be doing pretty bad these days...went from blunts, 40's, and b!tches to driving a 3100 GP...these are surely sad times.

 

[Snoop dogg]

Lol

 

[Snoop dogg]

okay I got it to start today apparently there was no fuel pressurebut the other thing is it idles a little low like its going to cut off but when I unplug the mass airflow sensor it idles a little too high I did take one of the plugs out and it looked a very bad do you guys think I should change the plugs first or do you guys think is the MAF

 

[BillBoost37]

Did you put that vacuum tube on top of the TB back in place? IIRC it's not easy to see the hole due to a bracket on the TB. But if it's missing, you'll have a hell of a time.

My car sounded cammed yesterday. hooked the brake booster back up and it purrs.. odd how that works.