I have a 1999 Mitsubishi Galant that sputters bad at 3,000 rpm. Only 130,000 miles. Just cleaned out mas air flow sensor n throttle body. What could be wrong

Those aren't fuel pump symptoms. Check the engine coolant temp sensor, clean the throttle body and idle air bypass valve.

The computer only knows the voltage across what it thinks is the MAS. A bad wiring connector and a bad MAS is all the same to the computer. I would change the harness to the MAS before I spent any time or money on any other problem solving.

Most cars have a rev limiter between 2000 and 3000 rpms when transmission is in park. Sputtering in gear could be bad plugs, dirty throttle body, dirty Mass Air Flow, bad Coil on Plug.(COP) Clean throttle body, clean Mass Air Flow sensor, remove and inspect plugs, replace if over 50,000 miles. Inspect all COPs for cracks. Use code reader to isolate fault or faults.

clean your air flow sensor

P1102 for the Mazda is :Mass Airflow Sensor Signal Inconsistent with Throttle Position Sensor. The Mass Airflow Sensor is located in the housing before the Throttle body; it reads the air coming into the system....the Throttle Position Sensor tell the ECU how much throttle you are asking for....I think that the in-air flow and the throttle are not getting the same answer; example would be that you are driving fifty miles an hour and either the MAS or the TPS are not seeing (receiving) this information. Note; most times the MAS is at fault, it can be cleaned but be very careful.

mass air flow sensor or the throttle body needs to be cleaned .first take the intake hose of the throttle body and spray the inside the the throttle body with throttle body spray. there is a pin hole under the flap or the butterfly that lets a little air in make sure that is allso cleaned out. let it sit and see if that fixes it. if not (MAS )sensor would be my next guess.

Try unplugging the mas air flow sensor.This is located in the air duct that goes from the air filter to the throttle body.If it takes off normal when unplugged then get some mass air flow sensor cleaner and remove and clean the sensor and let it air dry.You can find cleaner at most part stores.This should take care of your problem.Let me know.Good luck.

Try this, remove (MAF) Mas Air Flow sensor,(be sure key is OFF) so you don't set a trouble code when disconecting wire conector, with some throttle body/air intake cleaner from the outlet side of MAF, spray the sensor clean, let dry, reassemble.Remove snorkle from throttle body, and with a old tooth brush, clean throttle body& plate with cleaner, may take a couple of cans if throttle is badly 'coked' up. Hope this helps.

hey common problem w/the 2000 galant. you may need a mirror to see this, look and or feel where your throttle body mates up to your intake manifold. it has a problem of cracking, when you have an air leak there it will run like **** and usually shut off depending on the severity. this will cause you to get the throttle position malfunction code. if that is the case instead of buying a new or used intake manifold. take the old one off, and you can actually cut it flush and weld about a 2 inch in length tube to repair the crack. well let me know how it goes.

Hi,verify throttle cable is ok and connection at throttle body is good.If cable is ok,you need to do diagnostics on the computer..Every thing is speculation without data from computer.But i would check the throttle position sensor and the mass air flow sensor.Sometimes the maf sensors elements get dirty and cant read the correct amount of air flow entering engine.If this is the case,you can clean the elements with brake clean...Good Luck!!!