2007 stars then dies

07 2UZFE
218k
Cranks and starts no problem and dies after a few seconds.
Sitting at 1/4 tank fuel.
No codes. No pending codes.
Battery is good.
Where do I start? Check fuses and relays?
Was running fine yesterday when parked

 

This type of deal used to almost always be a fuel problem (dead/dying fuel pump etc).

A bad MAF(mass airflow sensor) would 100% cause your problem. However, you typically would get a code but I’ve seen them fail without the code right away.

Id start with fuses (anything related to fuel delivery), check pump wiring/grounding - rodents may be chewing on them, then move on to the MAF.

MAF sensor itself will have a couple fine wires that go into the air intake tube. If any are broken, thats your problem.

 

If you think it’s the MAF, unplug it it will go into a default fuel mixture mode, but it will run. It’ll run like shit and get bad gas mileage, but it will tell you if it’s the MAF.

 

MAF was cleaned 5k ago. Still good.
Throttle body cleaned at same time.
No apparent rodent problems but will continue looking around