bad idle and wont stay running

[turboant]

i have a 91 240sx with a ka24de auto. when i start it up it idles for a sec and dies off and when i move the throttle it makes a loud buzzing sound

[fricke21]

try checking your tps harness make sure its on all the way or you have a bad tps sensor if it runs for a few secs and dies its probably the tps sensor.

[turboant]

but when i unplug the tps sensor and still move the throttle it still makes that noise and its driving me crazy

[Bridgeport240sx]

it sounds like the mass air flow sensor check the conecter and clean the probe with sensor cleaner. a bad maf sensor has that same symptom.

[Bridgeport240sx]

if its not the maf it definatly sounds like a wireing or sensor problem