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What would cause exessive gas when i pull off the fuel pressure regulator hose

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  • 51 Answers

The fuel system is under high pressure so whenever the system is opened let the pressure bleed off gradually.

Posted on Jan 18, 2013

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: no gas going through fuel pressure regulator on 1995 dodge carava

I doubt the regulator is bad, the fuel pressure regulator is after the injectors in the return stream to the tank, more likely it is the fuel pump.

Posted on Mar 10, 2009

  • 7 Answers

SOURCE: Checked Fuel Pressure Regulator on 93 Ford Tempo GL 2.3 Liter.

As far as I know without checking it personally it sounds like it could be one of three things (in order from easiest to hardest). Clogged air filter, worn timing chain, leaking head gasket. To check for the third go to Auto Zone and get them to do a compression check, its free. I can't remember off hand but if the 93 has a TPS (throttle position sensor) that could also cause an irratic idle.

Posted on Mar 18, 2009

  • 92 Answers

SOURCE: fuel pressure regulator had no vacuum line connected

another engineers wet dream. think of it this way . what is normally in the intake when the engine is running.. answer vacume, hence the regulator gets its vacume without a hose connected to it as its already in a full time vacume chamber.no hose required . ps be carefull to seat the regulator and o rings securely into the housing befor you reattach the secureing metal clip.
good luck chris

Posted on Mar 23, 2009

  • 335 Answers

SOURCE: fuel leaking into vacuum line on fuel pressure regulator

If you have fuel on the vacuum side of the reg, that means the reg is leaking,causing a variaty of drivabiliy problems. Replacing this reg is very straight forward. Just add a little lube to the O-ring on the reg before installation. Good luck.
Yours Moe.

Posted on Apr 23, 2009

polarcycle
  • 1392 Answers

SOURCE: vacuum line for fuel pressure regulator 98 Tahoe

Was there a hose on the old one? If not, you don't have one. It is most likely your fuel pump if you are not getting fuel.

Posted on May 31, 2009

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94 chrysler town and country stalls after getting to a normal temp but wont start back up till its cooled down.


The crank position sensor could be bad.Check the injectors & fuel pressure regulator with this test.Hold the gas pedal to the floor while you crank the engine.Does it start??If yes,the fuel pressure regulator is bad or you've got a internally leaking fuel injector.Let the engine idle,pull the vacuum hose off the regulator and see if gas is inside the hose or gas is seeping from the regulator vacuum port.If yes,the regulator is bad.You can shut the engine off,wait 5 minutes then pull all of the spark plugs.If a plug is wet with fuel,that cylinders injector is leaking.A bad ignition module or ect sensor can also cause a no start.You can do the following test when the problem is occurring.Remove the air intake hose from the throttle body,spray carb cleaner or starting fluid into the TB opening, reinstall the hose,try starting the engine. If it starts and runs for a few seconds then dies,you've got a no fuel problem. If it doesn't start at all,you've got a no spark problem.

Oct 12, 2015 | Chrysler Cars & Trucks

1 Answer

Constant black smoke whenever accelerator is used?


Too much gas going through the engine-that's why black smoke. That's all your unburned gas going out the exhaust. Have the fuel pressure tested. A failed pressure regulator will pull extra gas into the engine. Pull off the vacuum hose to the regulator. If any evidence of gas in the hose, the regulator's diaphragm has broken and sucking gas through the hose into intake.
If fuel pressure is correct, have a scan done for trouble codes.

May 08, 2013 | 2004 Chrysler Voyager

1 Answer

My 5.3l vortec will start with ether but wont stay running


Is your gas cap on tight? Could be low fuel pressure. Can you check your fuel pressure? Have you checked your fuel filter? You may need to replace the fuel pressure regulator. Locate it and pull vac hose off of it and if there is gas coming out of hose replace regulator. You will need to relieve pressure before changing.

Feb 12, 2012 | Cars & Trucks

1 Answer

Went to store and was shopping about an hour, when i went to leave, the car would not start. then i noticed a gas smell so i lifted the hood and seen a drip of gas coming from the boot on the throttle body...


Sounds like you have a bad fuel pressure regulator.Try this,pull the vacuum hose off of the fuel pressure regulator and if fuel runs out then the regulator is faulty.You can also pull the vacuum hose off the map sensor and if you see fuel run out the regulator is faulty.

Dec 01, 2011 | 1997 Buick LeSabre

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

2 Answers

CHECK ENGINE LIGHT COMES ON??????? SMELL STRONG ODOR OF GASOLINE!!!!!!!!!!!!


Check the fuel pressure regulator.Pull the vacuum hose off of the fuel regulator and check for fuel inside hose.If you find fuel replace regulator.Also check map sensor for fuel.

May 23, 2011 | 2002 Chevrolet Avalanche

1 Answer

I have a 1993 buick century custom. im currently getting 198miles to the tank. at normal idle the car sounds like its being choked of air and trying to stay alive. always starts right up, never stalled and...


recommend you pull the vacuum hose off the fuel pressure regulator at the end of the fuel rail and check for gas in the line. You can plug the hose with a golf tee and start the car, then see if any gas comes out of the vacuum port of the regulator. This would indicate the regulator diaphram has failed and is causing the engine to run rich. Replace the regulator if it leaks gas out the vacuum port. The regulator looks like the below picture.
jturcotte.jpg

Nov 02, 2010 | 1993 Buick Century

1 Answer

6 cylindrer has trouble starting. You need to cranki it for a long time to start, but once it starts it runs perfect If it sits for more than 30 to 45 minutes it has the same problem but not after five or...


On the fuel rail there will ba a fuel pressure regulator. It will have a vacuum hose going to it. Pull off the vacuum hose and see if gas comes out of the nipple on the regulator. If it does than you have a bad fuel pressure regulator. If it doesn't than the next step would be to measure fuel pressure with a fuel pressure gauge.

A bad check valve in the fuel pump can cause the same condition you described. It is commonly reffered to as an "extended crank".

Sep 24, 2010 | 1995 Buick Century

1 Answer

Starting car is problem. it will start after maybe two trys. i have tried engine cleaner, but still it is slow starting,. battery is good, thats been checked.


When you have an engine that is hard to start or the engine takes longer than normal to start, with a fuel injected engine it will normally be caused by a fuel problem. Another problem would be slow cranking of the engine because of a low battery, I would check all of the fuel related problems if the engine seems to crank normally. There are a few things to check. First pull the fuel filter off and wipe it off so you don't get gas in your mouth and try to blow through one of the fuel connections on the filter. If you can't blow through it the filter is pluged and needs to be replaced. A plugged fuel filter can cause hard starting and can also damage your fuel pump. The next thing to do when everything is put back on the car is to check the fuel system for bleed down. You need to locate the fuel pressure test connection on the engine. Connect a fuel pressure gauge to the connection and start the engine, then turn the ignition off. With the engine off the pressure should read and stay between 30psi and 40psi, to be sure of the pressure you will have get the spec's on the engine you have. The main thing you will be looking for is to make sure the pressure doesn't start bleeding down in to direction of zero after a few minutes or maybe even immediately. If you see the pressure start to bleed down you have a problem. There are two problems that normally cause the pressure to bleed down. One is a bad check valve in the fuel pump, the other is a bad fuel pressure regulator. The main thing that happens with a fuel pressure regulator is the diaphram inside starts leaking. When that happens sometimes it will leak fuel into the intake manifold through the vaccuum hose connection to the intake manifold. To check for a fuel leak through the vacuum hose connection, locate the vacuum hose on the fuel pressure regulator and pull the hose from either the manifold connection or from the connection at the fuel reguator. If you see any gas at all the fuel regulator is leaking and must be replaced. If it is a slow leak from the regulator you might have to start the engine with the vacuum hose disconnected and look for a leak from the hose. If you don't find anything wrong with the regulator the next problem area would be fuel pressure bleeding back into the gas tank because of a bad check valve in the fuel pump. If this is the problem the fuel pump would have to be replaced. My first guess as to what is causing your problem would be the fuel pressure regualtor although I would definately want to make sure the fuel filter is not plugged. (Please Note) The fuel pressure regulator is located in the intake manifold area of the engine. The fuel pump is located in the gas tank. The fuel filter is located usually somewhere under the car.

Aug 24, 2010 | 2001 Pontiac Grand Am SE

1 Answer

The check engine light stays on my gas smells bad and my oil smells like fuel


You need to have the trouble code pulled so vehicle can be diagnosed. I suspect the engine is dumping fuel into the oil. If your fuel pressure regulator diaphragm ruptured this would give you the gas in the oil and a rich DTC. You could also have a coolant temp sensor that failed, making the computer think it's -40 degrees and commanding too much fuel-this too would make your oil smell like gas.
Trouble code would help in determining the cause. You can also remove the vacuum hose at the fuel pressure regulator-front left side of engine, on the fuel rail. It should be dry inside vacuum hose, if there is gas, the FPR diaphragm ruptured and more than likely that's the root cause of your problem.

Oct 03, 2009 | 1995 Buick Park Avenue

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