MAF Sensor

[Pilot8680]

I'll like to know the symptoms of faulty Mass AirFlow Sensor.
My car has 252,000 miles and recently when I decelerates, the rpm drops down to 300 and sometimes the needle fluctuates up and down which cause the car to vibrate. I haven't check for any codes but according to online, MAF might be the culprit. I cleaned the MAF this morning but still has no luck.
How do I check for broken MAF w/o checking for codes? and what else can be the problem?

[pmohr]

Why haven't you checked codes? Is there a reason you want to diagnose your problem while specifically ignoring any codes you may have?

That doesn't make any sense. Check the codes, report back.

[QNO_A32]

TPS?,VSS? CEL on?

[altezzablazes]

Originally Posted by Pilot8680

I'll like to know the symptoms of faulty Mass AirFlow Sensor.
My car has 252,000 miles and recently when I decelerates, the rpm drops down to 300 and sometimes the needle fluctuates up and down which cause the car to vibrate. I haven't check for any codes but according to online, MAF might be the culprit. I cleaned the MAF this morning but still has no luck.
How do I check for broken MAF w/o checking for codes? and what else can be the problem?

GET A OBD SCANNER OR TRY ADJUST YOUR IDLE SCREW

[Nycist]

go to autozone, have them read the codes(its free) post up your findings.

if it wouldnt rev. above 2k i would call it maf for sure, right now i can be a couple things.

[jd885]

it sounds like a MAF i would unplug the sensor and see if it runs any different and go to autozone and get those codes pulled

[njmaxseltd]

Clean the TB and the IACV, at 252,000 they are probably pretty gunked up.