I Need Major Help! PassLock maybe?

[joshscott84]

2002 Malibu LS 3.1 was running fine. I pull up to house turn off car, come out few minutes later to leave and car won't start. When I roll key forward I get all dash indicator lights for 2-5 secs then just oil, battery, and check engine stay lit after. Car cranks but no fire. All fuses and relays have been checked in both the interior as well as the engine compartment fuse blocks. I have no pressure in the fuel lines and where you could clearing hear the fuel pump priming before, you no longer can. Ordinarilly I would just say it is the fuel pump, but what is making not jump to dropping my tank so fast is the fact that I’m not receiving any voltage to the rear fuel pump connectors. Also when checking for voltage I grounded to the body to make sure it wasn’t an issue with a ground. Plus I find it hard to believe the fuel pump just died without any signs and regardless I should have 12 volts to the fuel pump with key in the ON position whether pump is bad or not. Never had an issue with the passlock before and the light is not now nor has ever been blinking. 68k miles, new battery, as well non-factory key. One weird thing is on several and very random occasions I’ve turn the car off and walked away and the car has honked the horn and locked the doors as if I used a keyless entry, for which I do not have.

I have tried the relearn process in the 10 minute increment and the 30 minute increments, both with 1,2, and 3 cycles. no luck

pulled the ignition switch and lock cylinder from the car. I have a haynes guide that has a diagram for continuity testing the switch but the connector displayed does not look like mine. So in curiosity I disassembled the ignition switch further only to find the contact pads underneath all burnt up minus 1 or 2. I'll attach pictures below. Not sure is this is normal or if the burns even make a difference but cleaning pads had no effect after reinstall.

 

[joshscott84]

OK on another forum I was given this info.

""the fuel pump primes with key turned for the first 2 seconds then turns off untill cranking , so if your checking voltage at pump connector with key on it will be zero volts afer 2 seconds of turned key""

This seems to be correct seeing how I see I have full power to the fuel pump. So the only thing left in the equation could be the fuel pump or the fuel filter clogged. Either way virtually same issue. I'll update in day or two after I change it out.

 

[zora]

Have you hooked up a fuel pressure tester to see what reading you get when you first turn the key to run?

 

[joshscott84]

Haven't hooked a tester to it but I tried to bleed the fuel line by pressing the valve stem in on key turn but pressure is none existent. I get no spurts or anything regardless of key position.

 

[Chuzz]

Try tapping the tank with a rubber mallet and see if it starts. Fuel pumps can die without any warning. I had one do that on a Pontiac 6000 that I had years ago. You say it cranks, but there's no fire, though, which leads me to believe it could either be a crank position sensor or cam position sensor that's crapped out on you. Check your Haynes manual, there should be information as to how to check them and the voltage that you should read. I don't have a manual on your car.

 

[joshscott84]

I'll try banging on the tank like you said, can't hurt. Though in regards to the two sensors I don't think they would effect the fuel pumps ability to prime though, pre-cranking. On key turn to on position, not crank, I normally hear the fuel pump priming loud as shit. I don't get that now. the crank position sensor would not stop the start from getting fuel pressure, only mess up the order in which the motor is supposed to fire. Similarly with the cam position sensor. Don't get me wrong I'm not certified mechanic, just going on deductive reasoning.

 

[zora]

so you either have a bad pump or bad relay

 

[joshscott84]

I've checked the relay so that leaves just a bad pump. To double check I'm going to jump the relay so the fuel pump is getting a constant 12-volts just to make sure before I go and drop the tank.

 

[Chuzz]

Car cranks but no fire. This is the only reason I suggested the CPS. I'm now thinking that you meant that it cranks, but just won't start. Have you tried a shot of starting fluid in the throttle body to see if it hits? If so, then you'll know it's fuel related. I don't know if your car has a fuel pressure regulator, but if so, it could be that.