2000 Alero V6 intermittenly decelerates while driving forcing me to pull to the side of the road. When I try to give it gas it will not accelerate but the car does not stall. If I shut the engine off and immediately start it again, sometimes it starts running fine again and sometimes it will not start at all. If I wait a little bit before I turn on the engine again it almost always runs as normal. This problem usually occurs when driving continuously for 30 minutes or more.
At first, I though it could be the battery and charging system. But all electric works fine and lights do not dim when problem is occuring.
No warning lights come up and has happened with multiple tanks of gas.
If it is a fuel system problem, could an old Fuel filter render the car powerless?, or does anyone think it is more likely the fuel pump or fuel regulator.
Any help is greatly appreiciated.
2007-01-04 06:03:11 · 5 answers · asked by NY K 2 in Cars & Transportation ➔ Maintenance & Repairs
Thanks bobweb,
I do have a code reader that hooks up to a laptop and I am getting no error codes. Although I am not running the diagnostics as I am driving. Also I did not expect to get an error code because the SES light is not on and does not come on during malfunction.
2007-01-04 06:23:56 · update #1
fuel pump
2007-01-04 06:05:49 · answer #1 · answered by catmanhough 2 · 0⤊ 0⤋
You have a computer scanner so I would guess you have graphing capabillity. If so, with engine off, key on graph the throttle position sensor by slowly depressing the throttle all the way then slowly releasing it. You should have a nice smooth chart of the travel. TPS typically wear at idle or just above idle but may also have dead spots at any point in their range.It could also be dirty fuel injector, most probably if you have throttle body injection, with only one or two injectors. If you have the capability you should look at long term fuel trim (LTFT) and short trm fuel trim (STFT) if the numbers are high it tells you the engine is running lean and the injectors need cleaning. Also check your fuel pressure. I am not sure of your particular car but usually around 40 psi.
2007-01-04 10:30:16 · answer #2 · answered by tronary 7 · 0⤊ 0⤋
The ideal solution for a tough problem like yours might turn out to be is to get a shop to hook up their scanner to your OBD-II diagnostic connector under your steering column and catch the event occurring while the car is being driven down the highway. If it was me, I'd rent another car for a few days and get my shop technician to agree to driving my car to and from his house to work so that he could have the scanner hooked up and catch the computer event occurring. It's called the "flight recorder" mode, and the dealer could do it if they needed to solve the problem quickly. A dealer shop would also know what's wrong if other Alero's have been similarly afflicted. Also check;
http://www.mycarstats.com for similar owner complaints, recalls, and TSBs recorded there for your car.
2007-01-04 06:18:18 · answer #3 · answered by bobweb 7 · 1⤊ 0⤋
It sounds like you need to go in for a tune up...it may be the spark plugs...have them check out the fuel line and pump as well.
2007-01-04 06:06:23 · answer #4 · answered by ? 3 · 0⤊ 0⤋
i once ran my alero close to e and my fuel pump went out. that was the end of dealing w/ it, altho i loved the car but it broke down too much.
2007-01-04 06:07:34 · answer #5 · answered by wizzpack 2 · 0⤊ 0⤋