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View Full Version : Starting Problems On 99 Alero


Andy
08-28-2004, 01:48 PM
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I am new to Aleromod.com and would appreciate the members assistance with a starting problem on a 1999 Alero 3.4 V6 with 63.000 miles. I recently helped my daughter purchase this car last week from a small car dealer in Indiana. We really like the car and with about 170 horses it has great acceleration on the highways.

Almost immediately after bringing the car home we noticed a problem with starting. The problem does not occur every time you start the car. When she turns the key it won't start unless she depresses or taps the accelerator. She might have to repeat the process a couple of times. I noticed the RPM needle jumping up and down and finally after a few seconds the motor smooths out. It runs just great after that.

I had the car serviced, lube, oil, filter, etc. and took it to a local car parts store where they did a computer check. The computer check indicated that an o2 sensor was defective (front bank). The next day I took it to a local garage. The mechanic said that it wasn't a defective o2 sensor but it needed a new mass air flow. This decision was reached not by what the computer told the mechanic in real time but what the history mode of the computer said, according the mechanic. The cost of the repair was about $168.

The next day my daughter drives the car to Cleveland and back putting on another 500 or 600 miles in 4 days. On the 4th day after the "repair" the starting problem begins again. I took the car back to garage and the car starts perfectly for them and the computer is telling them that nothing is wrong with the car. I plan to take back to garage and let them keep it a couple of days in hopes that it will act up when they have it on the computer.

Last night I began I Web search for some possible answers. I was surprised to learn about the number of complaints about the Alero particularly with starting problems, brakes, manifold covers, coolant leaks, and power windows, to name a few.

I am really at lost here. I am obviously not a mechanic. I don't know if it's a fuel, gas, or electrical problem. I read last night about a young woman who sounded like she has a similiar problem, luckily her boyfriend was a garage tech who discovered that the problem was a bad ground to the ECM computer.

I am not in a financial position to start replacing parts at a couple hundred dollars a pop. I read where the main computer could cost more than $500 to replace.

Any ideas to where to look for the problem would be appreciated. Also any repair places in South Central Ohio would also be appreciated. I need to get connected with people who know and love this car. We both like the car. She wants to save her money for "upgrades". I told her we might not even keep the car. It might make sense to cut our losses and sale it and go ahead and look for a Honda or Toyota. I'd rather buy American made if possible.

It appears that members really love this car. At this point I like it but I won't let nickel and dime me.

Thank you.

bigd6983
08-28-2004, 03:49 PM
everyone has this hard starting problem you are talking about......i will list a couple things that have helped.....

1. fuel filter, changed mine and it started perfectly.....
2. priming the fuel pump, turn the key to the on position and let it sit there for about 5 seconds before you start the car, it lets the fuel pump "warm up"

as far as changing the o2 sensor I am having the same problem, when the sensor goes bad the car goes into a safe mode where it will run the car rich and it basically runs like crap, I am 95% sure I am having that problem right now........as soon as I get the money for the sensor and figure out how to get my arms back there, it will be changed and ill let you know how it works out..........

mike2002
09-08-2004, 07:45 AM
ever find out what it was exactly? i just had this problem last night, tried to start it, no luck tried again, cranked for like 6 seconds, no luck, tried a 3rd, none, 4th time i pushed the gas pedal down and it started, then it drove fine. got home and it started right back up when i shut it off

the car had been sitting for about 2 hours, on a very steep hill (driveway) but had 7/8's tank of gas. trying to find out if this is anything serious asap, 600 miles left on my warranty..........otherwise love the car! my new gf loves it even more...score points for me! ha!

FormulaNERD
09-08-2004, 09:33 AM
i had this problem with my 99, well i've never had to press the gas, but i had the problem with it goin up and down from like 1100-700 rpms a few times, then smooth out. i just swapped the MAF from a 2001 grand am, both cars ran fine, so i kept it swapped (it was a rental, lol). now it starts fine, even with low grade fuel.

Pimpalero03
09-08-2004, 09:47 AM
mine does it to. always seems to do it when poeple are around though. lol

FormulaNERD
09-08-2004, 09:49 AM
i read somewhere that the oil from aftermarket filters gets in the maf and causes this, not sure if it's true, but after the maf swap mines fine.

mike2002
09-08-2004, 08:10 PM
it did it again today, started up the second time no problem, im definatly taking it to the dealer, i guess i should tell them i think the mass airflow sensor is bad? and to take a look at the LIM's, ill check those once my car cools down, thanks for the help guys!

FormulaNERD
09-08-2004, 08:31 PM
unplug the MAF and try and start it... let me know how it acts.

oh, and if you dont know where the maf is located, let us know.

mike2002
09-09-2004, 12:17 AM
where is that? i know it went bad on my 1st car....thanks again for the help guys, im in a rush to fix this....while its free - ha!

White_Alero
09-09-2004, 04:59 PM
I had a similar problem, it had a week turnover. The problem was that the battery had a dead cell and the dealer replaced it for free.

mike2002
09-09-2004, 07:50 PM
it cranks just fine, it just cranks and cranks....no problems today, but it does seem to take a second of cranking......well it looks like my intake manifold gaskets are bad, so im going to the dealer tomorrow anyways....good thing if its going bad, its going bad now..

FormulaNERD
09-09-2004, 09:31 PM
Originally posted by mike2002@Sep 9 2004, 04:17 AM
where is that? i know it went bad on my 1st car....thanks again for the help guys, im in a rush to fix this....while its free - ha!
ok, you know where the intake manifold is right? well it's easy, says 3400 on it. to the right is a black accordion type coupler, and connected to that is the MAF, it's black and aluminum. there is a plug on top towards the firewall side, unplug it and then start it, see how it runs.