Weak start and shuts off on Idle

2012 TOYOTA CAMRY

170,000 MILES • 4 CYL • 2WD • AUTOMATIC

MIGU3LLY

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My car is the LE model and it has a weak start up.
Sometimes I have to turn the egnition and pump the gas to get it to start.
Once moving, it is fine. Sometimes at idle, it will turn off. It has a code for the
input start speed sensor, but I do not think that is this issue. I have heard it is
rarely the fuel pump and usually is the pressure regulator that is the problem.
Any advice? Is this a job I can do myself? Any instructional videos? Thank
you in advance.

Aug 15, 2018 at 4:22 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.

ASEMASTER6371

AUTOMOTIVE REPAIR CONTRIBUTOR
52,796 POSTS

Good morning.

The fuel pressure regulator is part of the fuel pump assembly. You can just replace the regulator but since you are going to have to remove the pump, I would replace the pump assembly.

As far as the stalling, it may just be the throttle plate containing dirt and clogging up the passages.

Roy

https://www.2carpros.com/articles/throttle-actuator-service

https://www.2carpros.com/articles/engine-coolant-59420607

1. PRECAUTION

NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notice before proceeding with work See: Vehicle > Technician Safety Information > Repair Instruction - Precaution.

2. DISCHARGE FUEL SYSTEM PRESSURE

See: Fuel Delivery and Air Induction > Technician Safety Information > Fuel System: Precaution

3. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

4. REMOVE REAR SEAT CUSHION ASSEMBLY See: Seats > Removal and Replacement > Removal

5. REMOVE REAR SEAT CUSHION LOCK HOOK See: Seats > Removal and Replacement > Removal

6. REMOVE REAR FLOOR SERVICE HOLE COVER

(a)Remove the rear floor service hole cover.

imageZoom/Print

(b)Disconnect the fuel pump connector.

7. DISCONNECT FUEL TANK VENT HOSE

(a)Pull the tabs of the retainer to disengage the lock claws and pull out the fuel tank vent hose.

imageZoom/Print

Images (Click to enlarge)

Aug 16, 2018 at 7:45 AM