Best advice i could give is take to auto zone and have the computer checked for a code theyll do it for free . also if nothing comes up the alternator could be shorting out cause the issue , i had a chevy pickup i was working on and it was doing the same things and i did everything i could too it including taking an having the alternator checked and it checked good decided to change it anyways cause i wasn't satisfied that it was good and it fixed the truck .
SOURCE: mass air flow sensor bad on 2002 monte carlo ss
It's should be a simple remove and replace. Just make sure the engine is off. Also do not touch any of the filament wires on the sensor, just the plastic housing. Also after you install it drive the car for a little while (city speeds, cruising speeds and inbetween). That way the computer will be able to readjust its setting since it is a new sensor.
SOURCE: Chevy truck '02 surges between 45 and 55 mph
you should change the tps( throtal position sensor) this can cause that problem
SOURCE: mass air flow sensor
The mass airflow sensor is very important...it uses tiny diodes mounted in the flow path of the incoming air to the throttle body in units called CFM. It sends that information to the engine computer and the program calculates the proper amount of fuel needed to mix with the volume of air coming in. It is vital to your car that this sensor is properly maintained. If it's diodes are allowed to get dirty such as by having a dirty air filter, then the readings it takes will be inaccurate and the cars' performance will suffer. If the diodes break, you will not be able to drive the car and a new sensor is expensive.
DO NOT buy into snake-oil products like MAF cleaner...it is an expensive gimmick plus spraying anything under pressure into the sensor can break the diode filaments, some of them are barely .010" thick. Just remove the sensor with the proper bit and carefully poor a stream of isopropyl alcohol (isohol, rubbing alcohol) over the diodes until they shine. Then rinse with water and let air dry.
SOURCE: 2003 CHEV AVALANCHE 5.3 HAVE
Hello' With carburetor cleaner check for vacuum leaks around the rubber hoses coming off the intake manifold. Check for leaks at the intake manifold where it mounts to the engine. If engine speeds up when you spray that means you have a vacuum leak.
SOURCE: 2001 impala starts and dies It usually starts the
this sounds like a fuel issue, sometimes can be difficult to diagnose because its obviously being intermittant. whether its a fuel pressure regulator or the pump itself, i feel the most likely cause is the pump itself losing prime and thats why you have to try 2 times or more to crank because you are creating pressure from the fuel tank everytime you try to crank, this would also be a possibility as to the shut off if its getting hot than shutting down and than your able to start it back up. i would put a fuel pressure gauge on the vehicle and watch my fuel pressure readings to make sure they are staying true. if the fuel pump checks out than it will be an ignition or computer issue, i hope this helps
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