Question about Toyota Corolla

1 Answer

Gas in vacuum lines - Corolla Toyota Cars & Trucks

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 630 Answers

The fuel delivery system may need some work. Investigate the fuel delivery system if the engine won't start, if it runs rough or stalls in traffic.
Difficulty: Moderately Challenging Instructions (Please wear proper eye protection and work only with a cold engine)

  1. Step 1 Relieve system pressure by disconnecting the negative battery cable, taking off the cover to the engine relay block and removing the circuit relay. Reconnect the negative battery cable and start the engine. Let it run until it stalls. Slowly loosen the gas cap and allow system pressure to release. Reinstall the circuit and re-disconnect the negative battery cable.
  2. Step 2 Unhook the fuel pressure sensor vacuum hose. Check for fuel in the line. If there is fuel present in the line, the fuel delivery problem is likely a faulty fuel pump pressure regulator. If there is no fuel in the lines, reattach the vacuum hose and continue with the fuel delivery diagnostic.
  3. Step 3 Twist off the fuel pressure test port cap and attach a pressure gauge to the fuel pressure valve. Reconnect the negative battery cable and turn the key to the first position. Do not start the engine. Check the gauge. It should register between 38 and 44 psi. Disconnect the vacuum hose and check the gauge again. Pressure should hold at between 38 and 44 psi. Reconnect the vacuum hose and check the gauge one last time. Pressure should ease to between 33 and 37 psi. Pressure that's too high indicates a malfunctioning pressure regulator. A low pressure indicates a clogged fuel filter or a broken fuel pump that needs replacing.
  4. Step 4 Cut the engine and relieve system pressure again so you can safely remove the fuel filter to check for clogs. Remove the negative battery cable.
  5. Step 5 Disconnect the fuel lines and hoses, and remove the fuel tank stays and tank. Remove the fuel filter from its holding bracket with tool SST09808-14020 and pull it from the fuel tank.
  6. Step 6 Examine the filter for clogs and replace it if necessary. If there are no clogs, the fuel delivery problem is probably a breakdown in the fuel pump itself.

Posted on Jul 16, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

When I stepping my gas for 2003 ford expedition AC blowing no air, what's the cause of that?


AC blend air doors operate off of engine vacuum and when you press the gas pedal vacuum decreases. The vacuum lines for AC control have a check valve (under the hood along the firewall) and a vacuum reservoir which are supposed to keep vacuum on the system when engine vacuum is low. Check that all lines are good with no leaks and that check valve is working. Even a small vacuum leak can cause this issue.

Jul 09, 2015 | Ford Cars & Trucks

1 Answer

93 deville burns alot of fuel, like a gallon a mile; no leaks in fuel line. Any suggestions?


A ruptured diaphragm in the fuel pressure regulator will let extra gas enter the engine through the vacuum line to the regulator. Pull off the regulator vacuum line. Any evidence of gas? Let the engine idle a couple of minutes with the vacuum line off. If any gas starts coming out of the vacuum line nipple on the regulator, then that was the problem. Replace the fuel pressure regulator.

Jun 16, 2015 | 1993 Cadillac DeVille

1 Answer

Flooding starting


Check fuel pressure. You may have a bad fuel pressure regulator. Pressure may be too high, or the regulator diaphragm may have failed-if it is vacuum operated, pull off the vacuum line-if any evidence of gas in the line, the regulator has failed, and letting gas get sucked into the engine through the vacuum line. That could explain the gas smell and the flooding.

Dec 26, 2013 | Land Rover Discovery Cars & Trucks

2 Answers

I have a 1991 Chevy Suburban 57 liter throttle body injection started running rough couple of days ago yesterday started back firing and Bellowing black smoke out of the tailpipe it stalled a couple of...


Too much gas. Maybe the fuel pressure regulator has failed. Pull off the vacuum hose to the regulator-if any evidence of gas in the vacuum line, regulator is bad-diaphragm has ruptured and letting in extra gas to engine through the vacuum line.
If that is good, no gas in vacuum line, have the fuel pressure checked. Still possible the regulator is not right.
Watch the pattern of gas out the bottom of injectors while the engine is cranked. Should see a fine mist cone pattern spraying out from the injectors. If it is just dripping, injectors may be clogged.

Dec 11, 2013 | Cars & Trucks

1 Answer

Car burns gas to fast and keeps shutting off


does the car
smoke ? sounds like you have a fuel regulator problem,
its located at the end of the fuel rail.
has a vacuum line connected to it
remove vacuum line you may see traces of gas being sucked in
to the line.
replace fuel regulator that should solve your problem

Jul 19, 2012 | 1994 Toyota Camry

1 Answer

Exhaust pipe is blowing out a mist of black smoke


BLACK EXHAUST SMOKE IS A RICH FUEL MIXTURE.CAUSE BY WEAK SPARK IGNITION, FAULTY MAP SENSOR CHECK MAP SENSOR VACUUM HOSE AND ELECTRICAL CONNECTOR BECAUSE BAD MAP SENSOR WILL CAUSE RICH FUEL MIXTURE CHECK THE VACUUM LINE GOING TO FUEL PRESSURE REGULATOR, MAKE SURE FUEL PRESSURE REGULATOR GETTING VACUUM AT VACUUM LINE IF NOT LOOK FOR BROKEN OR DISCONNECTED VACUUM LINE TO FUEL PRESSURE REGULATOR, CHECK FUEL PRESSURE REGULATOR VACUUM LINE IF YOU SEE GASOLINE IN VACUUM DIAPHRAM TO FUEL PRESSURE REGULATOR REPLACE FUEL PRESSURE REGULATOR,CHECK THE EVAP CANISTER IF GAS SOAK IT WILL CAUSE RICH FUEL MIXTURE.

Aug 05, 2011 | 1995 Chevrolet Blazer

1 Answer

It gets flooded and backfires and looses power in 5th gear


SOUND LIKE LOW COMPRESSION INTAKE LEAKS WILL CAUSE BACK FIRING AND RICH FUEL MIXTURE.CHECK MAP SENSOR.MAKE SURE ITS GETTING VACUUM.CHECK VACUUM LINE GOING TO FUEL PRESSURE REGULATOR.IF VACUUM LINE HAS ANY SIGNS OF GAS INSIDE REPLACE FUEL PRESSURE REGULATOR.IF ALL IS GOOD.CHECK THE EVAP CHARCOAL CANISTER.MAKE SURE ITS NOT GAS SOAKED.

Jan 27, 2011 | 1991 Chevrolet Cavalier

1 Answer

I changed gas pump & screen, gas filter, gas regulator, dampner, & plugs.Is there anything else that can cause my van not to move? For example, my van will turn over but anytime I hit the gas the...


have you checked your tps on throttle body? As for vacume leaks start the engine and spray starting fluid on all lines also spray where intake mates to the heads if the motor revs up you found a leak

May 21, 2010 | 1993 Mazda MPV

1 Answer

Will not run when it get to temp


most time when carburated cars die at idle or warm like mine did it was just a vacuum leak you can change all you vacuum lines or first get a vacuum gauge and test your pressure then just try and change your vacuum lines

May 21, 2009 | 1984 Toyota Celica

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

49 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8548 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...