I changed the mass airflow sensor and o2 sensor in my 2000 Oldsmobile Alero but when I crank it up it runs till I push the gas. What is the problem?
Would you know?
Mechanic JK:
Hi Jerry. Can you clarify your problem. What do you mean when you say it runs till you push the gas?
You can crank it up but when you mash the gas it cuts off.
Does the engine shut off completely or does it just loose power?
Engine shut off completely.
OK. Then this does not sound like a sensor problem. Did you have a check engine light for the sensors you replaced or was that just a guess? If the engine light is on, do you know what codes are stored?
Well the check engine light is on and got it tested and it said it was the codes for the o2 sensor.
Could it be the fuel filter or MAP sensor?
OK. Well those codes or the sensor would not cause the engine to shut off. An oxygen sensor code may cause it to run poorly, but not stall. If there was also a Mass Airflow (MAF) code, this may point to a plugged catalytic convertor, but that will usually cause poor acceleration and lack of power, not a stalling of the engine.
A plugged fuel filter or MAP sensor would also cause a lack of power, not a total engine shut down. Again, does the engine just shut right off, or just loose power?
So what do you think the problem is.
What engine size?
3.4L v6.
If the engine just totally shuts off, you could have a loose connection under the hood, loose battery cables, or a bad ignition switch.
OK will check that and see.
Good luck !
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8 Comments on "2000 Oldsmobile Alero Won’t Go When Hitting The Gas"
My 99 Alero 2.4l starts up fine idles fine a lil ruff sometimes, but when you put it in drive and accelerate it doesn’t wanna go and rpm’s redline at 4 grand not 8, if you feather the gas pedal it gets up to speed like a turtle ? Also when taking off and u reach 30 mph the rpm’s rev from 2grand to 4grand then kicks back into gear please help ?
Sounds like you have a bad transmission. If the engine is revving up bu the car is not accelerating, the the transmission has a problem. Check the fluid level. If that is good, go see a transmission mechanic.
Olds Alero 2000 2.4l My car started stalling at idle and other very slow speeds, such as when turning or approaching an intersection. I changed the fuel filter, cleaned the IAC valve (three times) and most recently, the Throttle Position Sensor. Everything helped a little, but the engine still sputters when the gas is first applied at very slow speeds. When above twenty mph it never hesitates. Plenty of power, and numerous lights on dash, ever since driving through a strong rainstorm last summer. Too many codes to bother with. After changing the TPS, the idle went up from 800 to 1600, which seems a little high, then when you put it in gear it wants to stall out. The AC works fine, I guess the extra gas the injectors put in helps. It was stalling out, yesterday, because I just had the blower motor on. Could it be the ignition module? Or should I try the MAP sensor? The idle is not rough, but it stalls almost every time I try to accelerate from a stop or very slow speed, and when I first come to a stop at a stoplight.
Have the throttle body cleaned out real good. It may be full of carbon.
Got the parts I need but thank you. I do have to say that this video was very helpful. I lukecd out and was able to get to the wire connections without having to take the door panels off. I did manage to get out some of the denting with a rubber mallet. Not as good as it was but it will have to do until I replace the fender and get a new paint job. Thank you again for sharing this video.
My daughters Alero (4cyl 2.4, 178,000 miles) also had the same problem. Would stall coming to a stop or when coasting. Rough idle and stumble or stall, sometimes both if you put the slightest pressure on the accelerator when stopped in gear.No check engine light.I eliminated the obvious. Had fairly new spark plugs. Replaced the spark plug boots/connectors and fuel filter (original filter!). but still had same problem. Then I saw it! When the engine was at idle the vacuum was sucking the hose to the map sensor closed! Replaced with $2.00 peice of vacuum hose. Problem gone. Still has inherent shaky idle but runs good. Im happy. And solved the problem myself. Sometimes the vacuum hose looks fine at the sensor but is split where it connects to the vacuum port on the other side.
I Have A 2000 Oldsmobile Alero 2.4 4cylinder and it drives good but when i stop at red light or stop sign it stalls and I also have a check engine light on
You could have an ignition problem or misfires that are causing the engine to die out. Even possibly a bad ignition module or computer. Also, a faulty TCC solenoid inside the transmission can make a car stall if it is stuck ‘on’ when the car comes to a stop or slows. You may want to get it examined by a technician where he can take it for a drive and have a better determination of what may be wrong after it acts up. He could also scan for any codes or other problems.