Question about 1996 Saturn SL

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Engine floods after shut off...replaced fuel pressure regulator, no change...

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One or more of the fuel injectors are leaking when 'off'. Start the engine after being off for a while, let run for a moment or two, then shut off. Remove and check each spark plug for being black from excess fuel. Any that check black insulator, replace that injector. Hope this helps!

Posted on Feb 03, 2010

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1997 sl2 satun started with rough idol now won't start . cranks over and floods. has new fuel filter & air filter


Check the fuel pressure regulator. Pull the vacuum hose off it, If it smells of gas, Replace the regulator. Diaphragm broke and is flooding the engine threw that vacuum line. You'll also need to replace the spark plugs. Gas will foul them out also.

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1999Buick regal gs. Car shut off like it wasnt getting fuel changed filter got me home ran fine then cranks stuts back off like no fuel again blak flood smoke coming out exhaust


Use a fuel pressure gage, check for proper fuel pressure, key on engine off. Then with key off, see if pressure will hold for a bit? If the pressure drops like a rock, check for a fuel pressure leak, check for fuel injector leak and fuel pressure regulator leak. If fuel pressure regulator is connected to fuel rail and has a vacuum line, check to see if gas in the vacuum line, if so, pressure regulator is faulty.

Check for applicable trouble codes? How long since a tune-up?

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check your fuel pressure regulator,pull the vacuum line off it is wet with fuel,replace it,then put vacuum pump on regulator side see if it hold at least 15 psi steady,if it start loosing vacuum ,change it,

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97 s10 4.3 vortec..flooding when engine is hot. Went from 24 mpg to 13. Changed fuel pressure regulator. egr valve.Plugs,wires,cap and rotor button. Fuel pressure stays between 55 and 61 at all speeds,...


The fact the fuel pressure does not hold after the pump stops is a big problem indicating a fuel leak into the upper manifold, which would cause the flooding. This leak could have several causes, but since the problem is still there after replacing the regulator, it sounds like the problem is with the injector in the spider assembly.
It sounds like you have a design 1 spider assembly, with only one fuel injector distributing fuel to the six poppets. If that is the case, I suggest you try replacing the entire assembly (which will include a new regulator) with the Delco design 2 version which has injectors on each poppet.

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I have to pump the throttle several times and then it starts sometimes and sounds like backfireing allthough its feul injected!


'pumping' a fuel injected engine is NOT like the old days (like with a carb)-if you hold the petal to the floor, it shuts off the injectors-NO petal, the injectors pulse (and dump fuel to an engine that is slow to start). If you are having hard starting, chances are good you have a flooding condition-leaking injectors, leaking O-rings, a damaged fuel pressure regulator could all be re3asons for your hard starting (and backfiring from a flooded engine). You should try to HOLD the petal to the floor and see if that helps-if it does, you should get the fuel regulator checked, replace the injector o-rings, check fuel pressure and might even need to consider replacing injectors themselves (or having them cleaned).

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My 1983 5th ave leaks/floods fuel in carb and vacume canister when engine is shut off... any help?


The fuel pressure regulator is usually the cause for this...ask to see one at your local parts store...you might be able to change yourself...Hope this helps

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I have a 1996 gmc yukon 4x4 have flood problems I have put in new fuel pump has good fuel pressure changed coolant sensors changed throttle body changed computer plugs wires distributor cap and button coil...


Possibly a busted fuel pressure regulator diaphragm. The regulator is mounted to the end of the fuel rail.
With the engine idling, pull the vacuum line off the regulator port. If gas comes out of the port, replace the regulator.

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1 Answer

While starting my 2002 Ford Explorer sometimes it acts as it is flooded and will not start unless I put my foot all on the way down on the accelerator. I believe that this started when I came out of store...


well theres two things that could be happening. first would be the most obvious and to say the fuel pressure regulator is bad. simple test for that would be to pull the vacuum line off of the fuel pressure regulator, and check for fuel in the vacuum line, if so it needs to be replaced. if not the next answer would be if you take lots of short trips without getting the engine warm, the engine will actually flood. its because the EFI tells the injectors to stay open longer and to dump more fuel in the cylinder just as a choke on a carb would do, and if you shut it off during this time it can actually flood the cylinders with fuel.

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1992 F150 5.0 flooded


Hi, wow!

sounds bad, I would drain the oil and leave it over night to drip out so it is completely dry, leave all oil caps an anything that will allow air in off the truck.

Do you have a compressor or air line you could use to blast air through the engine. if this is diesel fuel then it will take much longer to evaporate if this is gas/petrol then over night should do it.

Hope this helps

Regards
Dan

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If the vehicle is flooding then the pressure regulator is probably bad not registering enough fuel to the system and shutting off the pump in the tank.

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