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Cause of gasoline flooding in the engine - Cars & Trucks

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  • yadayada
    yadayada Feb 14, 2012

    In order to assist you I must know the year, the make and the model as well as the engine size.

  • Johnny    Brown
    Johnny Brown Feb 14, 2012

    what year,make and model?


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  • Cars & Trucks Master
  • 5,332 Answers

Here are some causes.

-No Spark
-Bad fuel injector
-bad temp sensor
-faulty MAF sensor
-grounded injector control wire
-to much fuel pressure
-leaking fuel pressure regulator
-bad computer.
-worn out spark plugs
-bad coil, cap, rotor, or wires.

a year, make, model, and engine size will help!

Posted on Feb 14, 2012

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2 flooding cyliders in subaru forester 2000 model engine is it computer related issues? problem happened under idle in extreme cold conditions whilst trying to warm engine

Hello...i'm here to help you, but need a bit more information please. Is the check engine light on in your Subaru? If so, do you know what the DTC codes are that caused it to come on? When you say "2 flooding cylinders" does that mean those 2 cylinders are not firing and the spark plugs are wet with gasoline? What 2 cylinders are they? I don't think the problem is ECM related. Reply back and i can give you some suggestions on where and what to troubleshoot.

Jul 12, 2011 | 2001 Subaru Forester

1 Answer

Gas in the oil

When a fuel injector is stuck open, the fuel will flood out. Gasoline will definitely get into the oil when this is the case.

If the fuel pressure in your car is too high (above 7 psi) that may cause gasoline to get into the engine oil.

Gas could also leak into your intake manifold if there is a carburetor problem.

An inoperative injector system can also cause this problem, because if the engine is not firing appropriately, the gasoline will end up running down the walls of the cylinders.

Check to see if the float in the gas tank is rising the way it should be rising or if it needs an adjustment. You will not be able to look at your gas gauge and get an accurate reading If the float is not functioning properly.

Your engine may be running rich, with too much gas going into the engine and too little air.

Check to see if the oil level might be really high. This can also cause trouble

Two ways to tell if you may have a problem with gas in your engine oil are:
1. If you start to smell a strong odor of gasoline while you are driving.
2. You notice white clouds of smoke coming out of your tailpipe.

If a large amount of gasoline does get into the engine oil, change the oil immediately upon fixing the problem that has allowed this to happen.

Jul 08, 2011 | Lexus ES 300 Cars & Trucks

1 Answer

My engine wont crank like as if the engine is do i clean a flooded engine? it smells like gasoline on my spark plugs when i took them out...please help out of ideas....ive checked...

If the engine truely is flooded, you need to let the vehical sit. The more you try to start the car, the more gas you are pumping into the engines. If you let the vehical sit, some gas will drain out. Hope this helps! Please rate 4 thumbs up!

Apr 18, 2011 | Acura Integra Cars & Trucks

1 Answer

Engine fluds when you press the gas pedal

are you sure its flooding heres a way to see if its truly flooding or if theres another problem your not aware of first start the "crossover" meaning the trailblazer keep it in park and step on the gas if it boggs down and you have a stong gasoline smell comming from the exhaust then its flooding if it doesnt smell like gasoline then its a completely different problem

Feb 07, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

I have problems with 1995 Saturn SL when I start I have to pump gasoline and aselerar to start the engine, and produces a sound like false vacuum or air at boot time

well you should never pump the accelerator that will flood the engine...cause the fuel system is fuel you could have a problem with the fuel delivery and or the should check the fuel pump pressure being delivered to the fuel rail

Sep 03, 2010 | 1993 Saturn SL2

1 Answer


I'm not sure if this is it but the hissing could be the air conditioner freon equalizing pressure in the orface tube...The flooding could be due to a bad fuel pressure regulator with a punctured diaphram will cause fuel to be dumped in through the vacumn line into the intake manifold..regulator is on the fron of the engine near the top on the drivers side its round in shape and has a black plastic vacumn hose on it with a 90 degree rubber elbow on it, at the end of the fuel rail ..good luck hope you find it

Jan 27, 2010 | 1996 Oldsmobile Cutlass Ciera

1 Answer

Mazda RX8

It usually is evident. It may sound odd, but if you take out the oil dipstick and smell it, you should be able to smell gas if it's in there. I would still recommend changing the oil just to be safe. Fuel in the oil could ruin the apex seal on the rotors and repairing that will cost alot more than an oil change. Also make sure that whoever changes it uses 5W-20 Non-synthetic oil. Synthetic oil will break down parts in the engine. I hope I could help.

Dec 27, 2008 | 2004 Mazda RX-8

2 Answers

2004 classic stopps. found flooded out spark plugs

put fuel injector cleaner in it and check your air filter

Nov 14, 2008 | 2004 Chevrolet Malibu

1 Answer

1997 BMW M3 3.2 EVO

Your fuel injection pressure is probably leaking down causing gasoline to leak into the cylinders and resulting in a hard hot starting condition due to "flooding" of the engine. Try holding the accelerator pedal all the way to the floor of the car like your trying to go maximum speed down the highway and crank the engine for 10 seconds or less at a time. That tells your computer to enter the "clear flood" mode and stop injecting gas into the engine. Ask your repair shop to measure the fuel pressure and see if the pressure is bleeding off too rapidly.

Jun 28, 2008 | 1997 BMW M3

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