Question about 2001 Cadillac Catera

2 Answers

Gas is being forced out of the fuel tank when the vehicle is running.

Posted by on

Ad

2 Answers

  • 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.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 662 Answers

A defective fuel pressure regulator (located on the fuel rail) may have blown the gasket on the
fuel pump (located in the gas tank).
Another thing to check - the car's computer may have posted
an error code from the fuel tank pressure sensor.. I'm not sure, but if this sensor shows pressure
building in the fuel tank, rather than let it explode its seals, the sensor may intentionally leak fuel
in order to relieve the internal fuel pressure build-up inside the fuel tank.

On the fuel rail (supplies fuel to the fuel injectors on top of the engine), there will be a Schrader valve,
which is your connection to connect your Fuel Pressure Gauge to your car's fuel rail.
Give it a check, but put a shop rag around the connector as your screw it in - fuel (and fuel
pressure) will leak as you install the fuel gauge.

You may get computer diagnostic codes P0158 or P0159 - see below for interpretation.
Note that the PCM is the Powertrain Control Module, which is the car's computer.
Also "TP sensor" is the throttle position sensor.
---------------------------------------------------------------------------------------------------------------------------------------
Trouble Code: P0158

Meaning: HO2S-22 (Bank 2 Sensor 2) Circuit High Input

Possible Causes:

Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)

HO2S element is silicon, water or fuel contaminated

HO2S signal circuit is shorted to system power (B+)

HO2S signal tracking (water intrusion) in the connector causing a short between the HO2S signal and heater power circuits

PCM has failed

----------------------------------------------------------------------------------------------------------------------------------------
Trouble Code: P0159


Meaning: HO2S-22 (Bank 2 Sensor 2) Slow Response

Possible Causes:

Exhaust leak present in the exhaust manifold or exhaust pipes

Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)

HO2S element is silicon, water or fuel contaminated

TP sensor element broken (can cause false acceleration event)

Posted on Mar 18, 2011

Ad
  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 43 Answers

I had a similar problem and found it by accident when I was pulling the tank apart, the pump is mounted to the bottom the the gas tank and has a molded rubber fuel line between the pump and sending unit and it was split causing pressure build up in the tank and only 15psi at the fuel rail. If I remember right there was a electronically controlled vent that would relieve pressure and possibly fuel if the tank was full enough

Posted on Nov 29, 2011

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Car won't start. Ran out of gas. Added gas. Still no start. Checked fuel line to distributor rail...no gas. How to resolve...?


Possible fuel pump failure. Gasoline is used to cool and lubricate the in tank fuel pump. Running a vehicle out of fuel is not good for the pump. Try banging on the tank with your fist while someone cranks the vehicle over. If the vehicle starts or tries to start, suspect a fuel pump problem

Jul 01, 2015 | 2001 Ford Focus

Tip

Keep your gas fresh


never let a vehicle sit without adding fuel stabilizer to tank.and a can of dry gas. this will save you a lot of aggravation in the long run. once fuel is mixed in tank let vehicle run for 5 minutes so its goes thru the whole system. Old bad gas will cause all kinds of mystery problems.

on Apr 04, 2011 | Chevrolet Suburban Cars & Trucks

1 Answer

I just fueled my F-250 5.4 liter gas powered truck. Now it won't keep running .


If you have debris in the tank, you must clean the fuel tank. That usually requires removing it from the vehicle. That is not an easy job, it is best left to a garage to do. First try to disconnect the in-line fuel filter and place a bucket under the line and see if fuel is flowing and then if any foreign matter is found in the fuel in the bucket. If you do, then you probably need to have to fuel tank cleaned out. Your new filter may already be clogged up. That would mean it is doing its job filtering the fuel before it reaches the engine.

Good luck

Aug 09, 2014 | 2008 Ford F 250 Super Duty 4WD

1 Answer

'93 Ford Probe Fuel Pump Collision Switch released


You must add at least three gallons of gas/petrol so the electric pump will prime properly. Be aware that when you run out of fuel/petrol you can damage the pump, the tiny fuel tank mounted pump requires the fuel it runs in for cooling and lubrication, so when you run out of gas it is damaged to some degree, this shortens the life of the pump and in some cases on high mileage cars (or cars that are run out of gas on a regular basis) the pump may not restart. The reset fuel pump button is only activated by a vehicle crash exceeding 3 times the force of gravity, so running out of fuel doesn't trip that switch.

Aug 29, 2012 | Ford Probe Cars & Trucks

2 Answers

Vehicle runs until gas guage is at half full, then dies, gas added will cause vehicle to run again


Remove the fuel tank an check the line connections at the pump, good time to check the fuel guage also

May 16, 2010 | 1996 Ford Explorer

1 Answer

Been siting for awhile,can't get gas to engine


This is going to sound strange but sometimes when a vehicle sits the gas drains back into the tank. This happens when there is an air leak in fuel system (lines, fuel filter, fittings in the system, etc). Place a short length of hose into the gas tank filler opening. Prepare to blow into the hose while sealing the opening around the hose and the filler neck. You can seal it with tape or just by holding a plastic bag tightly over the opening and around the hose. Blow in slowly and steadly. You want to pressurize the system and then hold the pressure to force the gas thru the fuel lines, fuel filter, etc. You want to inhale thru your nose and exhale into the hose just enough to pressurize the system. You can then exhale thru your nose as long as you hold the pressure in the hose (stick your tongue over the hose end to seal it). Don't breathe in from your mouth or you will be hating things. When releasing pressure from the hose do so gently or the gas will slosh back on you. You can have someone crank the engine while you are pressurizing the fuel system. You are just trying to move the fule that much closer to the carbs so you can get her running. Another option is to pour some gas down the car and try starting the vehicle. It will run for a short time and allow the fuel pump to pressurize the system. .

Feb 15, 2010 | 1989 Ford Bronco II

2 Answers

Gas spewed out my gas tank in my 1991 civic hatchback while running. drove about 100 miles in 80 degree weather and parked idling for about 5 min when i looked over and gas was spewing out tank while gas...


Sounds like your gas cap may not be on right or is faulty ...and is now heat is forcing the fuel out of your gas tank. If removing and reinstalling the gas cap or even replacing it doesnt work, this is just an idea as to what the problem is. This is a very hazardous driving situation. I would NOT let anyone drive this car at the moment. Call a repair shop that has the ability to tow the vehicle. and expect a price tag somehwere in the range of 600-800 dollars to replace a fuel pump plus towing. Leaking fuel at that rate is not to be taken lightly. In anycase,it could be a fault in the fuel vapor canister, fuel lines clogged or damaged or even a faulty gas cap. I just want you to be safe at all costs...and if towing it ensures it...then do it.

Jul 07, 2009 | 1991 Honda Civic

2 Answers

Ran out of gas wont start now


if its petrol engine bang bottom of fuel tank while some one else cranks vehicle over if it starts good just pump jammed if it dont buzz to life and you cant hear fuel pump buzzing ceck for power to it if thats there replace pump. running out of fuel kills electric fuel pumps internally in petrol tanks.

if its diesel you must bleed fuel system taking extreme care if you un do lines some very high pressure

May 30, 2009 | 2000 Nissan Xterra

2 Answers

Replacing fuel pump on 2002 sunfire


after the straps are off ,it should drop a few inches about eight or so ,than you should disconnect the two lines beside the fuel filter that run to the fuel pump,than you should disconnect the third one at the fuel pump,than once complete slowly pull the tank to the passenger side of vehicle,it will take a little foce but will come,it really helps if you could get the vehicle up about a foot or more before starting and you should have more than enough room to pull tank and fuel pump out,undo the two plugs than you have to turn the locking plate counter clockwise thats on top of fuel pump to get the pump out and if taking the tank right out disconnect the main line for fuelling

Feb 28, 2009 | 2002 Pontiac Sunfire

1 Answer

Hesitation, stalling like out of gas


Clogged Catalytic Converter. What happens is as you push down harder on the accelerator you force more gas into the system causing a slightly richer mixture and more exhaust flow is neccessary. The easiest way to look for a clogged cat is when it's dark out take it for a ride causing it perform it's problem look under the vehicle if the cat is literally glowing red hot you either have a clogged cat or an extremely rich fuel mixture.

Nov 20, 2008 | 1994 Jeep Wrangler

Not finding what you are looking for?
2001 Cadillac Catera Logo

555 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

76132 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

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

Answer questions

Manuals & User Guides

Loading...