My 1999 Grand Am GT idles weird when i start it and once in a while it will die but start right back up. I had my uncle look at it and we searched through it and he said that the 1st cylinder isnt pulling enough compression. I was just wondering if there was an easier way to fix this, other than the main option which would be to get a new motor. Thanks

SOURCE: car wants to die

P0461 reads: Fuel level sensor circuit, range or performance problem.

P0463 reads: Fuel level sensor circuit, high input.

Both codes point to changing the fuel sending unit and, I'm sorry to say, isn't cheap. I recently replaced mine and it ran about $300 for an aftermarket unit purchased from O'Reilley auto parts.

SOURCE: 2001 Pontiac Grand Prix Gt not shifting into OD

this trans is the 4T65E. It needs a 4th clutch hub. The splines strip off around 120k or more because they weren't hardened from the factory. The new ones have the hardened splines. The trans needs to come out and be partially torn down. I've fixed alot of these. Change the EPC solenoid while you are there. They wear and hang up causing intermittent harsh shifts

You can drive them forever without changing the hub but you'll never have 4th gear

SOURCE: 97 grand prix gtp starts then immediatly dies

If you have a GTP these engines use a hi output fuel pump. they use a fuel pump resistor located under the battery tray (look up from under the car) This resistor lowers the voltage to the fuel fump when not in boost mode. because of its locatoin it is prone to corrosion. if you bypass the wires and the engine starts and stays running replace the resistor

SOURCE: 1997 pontiac grand prix GTP that will die while im driving

I would start by replacing the Crank sensor and the cam sensor.

SOURCE: 1999 Grand Am 3400 v6 misfire.

I was asking about the pushrods because I had this problem with one of these engines that had a bent push-rod. I robbed a push-rod out of an older 3100 and it was just a fraction of an inch longer which bottomed out the lifter. I figured it out by removing the valve cover and loosing the rockers when it was running and it smoothed out. I'm guessing you checked for vacuum leaks already. How about injection pulse on the number 6 cylinder when running. Another thing you could check is running compression. You said you checked compression but did you just check cranking compression or did you check running compression too.