2002 Chevrolet Monte Carlo electrical

MATT66693

MEMBER
2002 CHEVROLET MONTE CARLO
3.4L
3 CYL
AUTOMATIC
100 MILES

OK so I am working on a 2002 monte carlo with the 3.4 3400 engine I changed the head gaskets manifold gaskets everything put it all together had starting issues hooked up a push button to it no problem. Ok had a misfire did all the normal tests to see why it was miss firing the lower manifold gasket ended up being the problem put the car back together. That's when my nightmare started oh let me back it up the ignition lock cylinder was going out as well it would take 5 mins sometimes to get the key to turn in the cylinder u really had to wiggle it and play with it to get it turn. So anyway I has to change that plus the ignition switch. Well Hugh electric problem first the battery won't hold a charge and really doesn't charge the dash lights go out really fast cause of the battery losing its charge I guess ever once and a while all the lights inside the car start flashing and going nuts and as they flash the speakers make noises in time with the flickering. Also it only happened twice but the fuse box under the hood where the fuel pump and drl relays are was making a loud clicking noise. Now after a charge the dash will flash a battery sigh low fuel sign and the security sign it will cycle between those 3 or sometimes it will flash battery low fuel security never seen that before also when I turn the key the furl pump doesn't turn on so obviously the car won't start. Please help by the way I have a good knowledge of car been working on muscle car a while just started on newer Cars a little while ago so the electrical and computer stuff is new to me still what a headache I also have a snap on Solis ultra diagnostic tool but the battery is too weak thanks for ur help

4 Replies

WRENCHTECH

MECHANIC
20,758 POSTS

I don't understand why you are asking us about anything when you have all these known problems that you haven't resolved.

The first thing you have to do is replace the battery and hope you haven't already damaged any electronics with all the power swings.
How about the basics when putting the engine together? Did you send the heads out to a machine shop foer testing and resurfacing. Did you get all the pushrods back in the correct positions? They are different for intake and exhaust.

After all those things are resolved, you replaced an ignition lock which means you now have to perform a Passlock security relearn procedure.

30 MINUTE LEARN PROCEDURE

TOOLS REQUIRED
None

Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the PASSLOCK Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK).

IMPORTANT: The vehicle learns the PASSLOCK Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

Start the engine (the vehicle has now learned the PASSLOCK Sensor Data Code and/or password).
With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).