Last post on Jul 28, 2013 at 7:23 AM
You are in the Oldsmobile Alero
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Oldsmobile Alero, Engine
#437 of 446 Re: 2001 Alero starts then dies [drumrick]
Jun 16, 2013 (6:51 pm)
For what it is worth, I have a 2001 Alero. I bought it in 2009 for $2500 she had 101 thousand miles on her. Since I have had that car, I have yet to have problems with the BCM or the ECM. (Now with that said, They both will fail tomorrow, that would be just my luck.) But anyhow, in the last 4 years, I went through 2 fuel regulators, a set of coils, an ignition module, a starter and the ignition switch. All of that was within the first year of owning it. She currently has 184K miles on her. In my experience with my car, all electrical issues have been traced back to the ignition switch. I remember with the original switch from the factory if the outside air temp was below 50 degrees the car would not start. The starter would hit but no fire in the cylinders. and the trunk would randomly pop open and the door locks would unlock as if I was turning off the ignition switch. Onto a different subject and car, I have a 95 GEO Tracker, she has a problem with not idling at 750 RPM. The engine idles at 3000 RPM. I still have not figured that out yet. I am thinking it is the ECM.
But anyhow, that is my 2 cents worth,
#438 of 446 Re: Alero dies in traffic [artgirl774]
Jun 17, 2013 (7:17 am)
This is NOT a passlock problem. It could be many things. Check these:
* Fuel Filter [just replace it. it's cheap, and at 102,000 miles, it should be replaced anyway.
* Fuel pressure at the fuel rail. [get a service manual for instructions on checking this]
* Read out trouble codes through the ALDL connector. [a scan tool that connects by bluetooth to your smart phone or android tablet costs only $12 - $25 on ebay, and an App called "Torque" is free at the Google Play store.] You will then be able to read the engine trouble codes, and diagnose what is causing the no-start condition.
* You may have a bad crank position sensor, which can cause stalling. [A trouble code will be set if this is the case.]
* you may have a defective catalytic converter, in which the catalytic beads have blocked the exhaust, causing back-pressure in your exhaust system. [this will cause an oxygen sensor trouble code to be stored.]
* you may have a bad ignition module, causing only half your cylinders to fire, which could cause stalling. [This would be indicated by a missfire trouble code]
Good luck, and I hope you find the problem. A 2004 Alero is a nice, economical car to drive, if you can get it running right. (hope it's a stick shift. They are the best!)
#439 of 446 2003 Alero Wont Stay running
Jun 20, 2013 (5:24 am)
2003 Alero. Initial problem is the car would not start. Changed the starter, still no start. Did the secruity of 10 minutes with the key in on position, then the car started. Car ran for 1 week. Car died again. Tried the secruity thing again. Car ran for 1 block and died while driving. Changed the alternator. Car ran for 5 miles died while driving. Replaced the new alternator with another new one and a fully charged battery. Car drove for 5 miles and died while driving again. The battery light is coming on the dash board. With a new alternator (that passed test) and a fully charged battery the system is showing only 30 amps. Any ideas.
#440 of 446 2001ols alero starting problems
Jul 26, 2013 (4:29 am)
Hi,I have a 2001 olds alero with a security light issue .I took it to gm and they said it was a ignition switch and lock cylinder. So I replaced it and all was fine. Then I started having other issues like, auto lights wont work, door locks started going crazy while driving, trunk was popping open on its own. Recently the security light came on again so I replaced the cylinder lock and ignition switch again. The car started fine but when I shut it off, it would not start again. I tried the relearn but the security light will not blink and will not start the car.I took the BCM out and noticed a crack in it so I took the case apart and seen te circuit board was corroded like its been wet.
My question is can the BCM cause the car not to start if its bad. When I start the car it starts up fine then shuts off.I aslo want to note that I did not buy a gm cylinder lock it was from autozone.
Thanks for any input in my problem
#441 of 446 Re: 2001ols alero starting problems [ghedge66]
Jul 26, 2013 (5:10 am)
The body control module is what controls everything from headlights to the trunk latch. If there is corrosion on the connectors and it has gotten wet that would cause a lot of the issues you are describing. Clean up the corrosion and look at the module circuit card. Make sure that it is clean. Also make sure the connector contacts are clean as well. If you are fluent with a soldering iron I would recommend that you look over all the solder connections and make sure that there are no cracked solder joints. Worst case scenario, you may have to replace the body control module. If you determine the module needs to be replaced. I am sure someone has a refurbished module on eBay.
Good luck with it,
#442 of 446 Re: 2001ols alero starting problems [appellof]
Jul 27, 2013 (4:48 am)
Thanks Daniel, One more question. Can the BCM cause my car not to start? It will start up then shut down.Security light comes on and it wont do the relearn to start back up.I was told to make sure I buy a GM cylinder lock instead of after market one. I have had this security light issue before and relaced the cylinder lock and ignition switch and it lasted a year. Any input would be appreciated ..thanks
#443 of 446 Re: 2001ols alero starting problems [ghedge66]
Jul 27, 2013 (2:24 pm)
When the car starts, does it run for 1 or 2 seconds? The BCM is where the security system lives. It is also referred to the "pass lock" system. Just for S&G,
Have you checked the fuel regulator? If the"> fuel regulator has failed it will allow the engine to start but quit after a few seconds. If the engine starts and immediately dies the security system thinks the car is being stolen and it Locks out the ignition module. Also check the coils and make sure that the coils are good. What size engine do you have? If it is the 4 cylinder engine, it utilizes what is called "wasted spark" design. Meaning that the coils produce a spark not only on the compression stroke but also on the exhaust stroke as well. The fuel regulator could also be partially failing meaning it will run for a little bit but then die. If the regulator fails it will allow all 65 pounds of pressure from the fuel pump right up to the injectors. The injectors are only good for up to 5 PSI. If more than that gets to the injectors, they will leak and flood out the engine.
Let me know if you have more questions I hope this is helpful
#444 of 446 Re: 2001ols alero starting problems [appellof]
Jul 27, 2013 (6:03 pm)
The car does run then dies in about 2 seconds. Yes it is a 4 cyl . So if the bcm is bad could It cause the start/stall problem? Is there any special way to check the fuel regulator?
thanks for all the help
#445 of 446 Re: 2001ols alero starting problems [ghedge66]
Jul 27, 2013 (6:33 pm)
Do you know where the regulator is located? If not it is located on the top left side of the engine. It is round and has a vacuum hose connected to the top of it. The best way to test it is to remove the vacuum hose off the top and move it to the side. Then, turn the ignition switch to the "on" position.
*******VERY IMPORTANT DO NOT TRY TO START THE ENGINE************
Just turn the switch to the on position. Look through the opening between the hood and the dash. From the driver's seat you will be able to see the regulator. If there is a stream of gas coming out from where you pulled the vacuum hose from the top of the regulator, The regulator is dead.
The BCM could cause the engine to stop but not likely.
Try that and let me know,
#446 of 446 Re: 2001ols alero starting problems [appellof]
Jul 28, 2013 (7:23 am)
Ok thx Daniel I will try that today and get back with you later.