Thread: I'm new to this

Hi my name is Patrick M. and I have a 2002 pontiac grand prix se 3.1L. Now I been having problems with it. To start the Crank Position Sensor, Knock Sensor, and fuel pump had to be replace. Because I was driving the car I cut off the engine, later on got back in to start it and it wouldn't start. Before I replaced the three parts I mention earlier. So when it wouldn't start the first thing i did was replace the spark plugs and wires. It started up and ran but would cut off when stopped at red lights and the RPM gauge was jumping. The check engine light came on , so I took it up to auto zone and it had the two error codes for the Crank Position Sensor and the Knock Sensor. I had them replace and then the fuel pump wasn't sending enough gas so I had it replace. Now it's getting enough gas but it still won't start. I've Checked all the fuses in the main fuse box and the fuse box in the glove compartment. And none of them is blown. Any help or advice will be helpful if there is anything else I should check.

I have No security light on

I have check all of the fuses in the main fuse box under the hood and the fuse box in the glove compartment. I had a mechanic come by and look at the car. He checked the main fuse box and the coil pack and said it was getting power but he mention something about a harness.

No but I was thinking about replacing that and the PCM. But I will have them scan the car again to see if there is that code showing up. Thanks dsmuts.

If I change the PCM with a used one. Do I have to get it reprogrammed or something for my car? I'm just asking.

If the PCM isn't bad then can it be the other computer in the car. That's the one under the dash board near the e-brake.

Originally Posted by 1ATony

Welcome to the site

Thank you

Originally Posted by dsmuts

I'm not sure what you're talking about.

I'm talking about the BCM. Does that have to do with the ignition system?

The two engine codes was P0336 & P0327. I replace the knock sensor and the crank position sensor in the back of the motor. Do I need to rep"ace the crank position sensor behind the harmonic balancer?

Originally Posted by dsmuts

The crank position sensor is behind the harmonic balancer.

What can I use to keep the harmonic balancer from moving. Because i'm having a hard time tryin to get the harmonic balancer bolt loose. Any help please.

Originally Posted by dsmuts

Put a pair of visegrips on the flywheel or put a breaker bar on the bolt and crank the engine over and it'll break loose.

Thank you dsmuts

Well both the Crankshaft Position Sensors have been replaced and the Knock sensor have been replaced. Now both engine codes are gone (P0336 & P0327) but the car still won't start. When the mechanic replaced the crankshaft position sensor behind the harmonic balancer, the mechanic said that the sensor connector leading to the engine two of the three wires came aloose. So he replaced the connector and the car still won't start. The only way it starts is if you spray starter fluid in the intake. He asked me if the car had a anti theft on it, and i told him only the old factory radio. But I replace that when I first had the car and I had no problems before. Could it be a loose wire or the fuel injectors or something. I hope he didn't get any wires crossed when putting the new sensor connector on. Sorry to bother people but I have loss two jobs because of this.