If I have fuel in my intake manifold, can that cause my engine not to start due to flooding?

Question

I recently took off my upper intake manifold, thinking my problem of my truck not starting was due to the F.P.R. but when i removed it, there was fuel inside the intake manifold cavities and the carbon build looked wet like fuel had been leaking out into it. What could be the problem that's causing the fuel to leak, and would this flood my engine and cause it to not be able to start?

Other info, Engine will turn but not start. Every 4th or 5th turn it stops then tries again.
Any other questinos just email me, [e-mail]
Thanks

Answer 1

Yes - if there is raw fuel in the intake manifold it is very likely to flood the engine.



You don't mention make, model, or year, or whether it is carbureted, throttle body injected, or port injected. If carbureted the choke may be stuck closed or the float may be full of fuel; if throttle body injected the o-ring around the injector may be leaking, and if multi-port injected an injector may be dripping.



Although the repairs are different for each system the way of dealing with flooding as a driver is the same: hold the accelerator to the floor (don't release it until it starts or you give up) and crank 3 - 5 seconds at a time, resting 5 - 10 seconds in between.

Answer 2

Fuel In Intake Manifold

Answer 3

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RE:

If I have fuel in my intake manifold, can that cause my engine not to start due to flooding?

I recently took off my upper intake manifold, thinking my problem of my truck not starting was due to the F.P.R. but when i removed it, there was fuel inside the intake manifold cavities and the carbon build looked wet like fuel had been leaking out into it. What could be the problem that's...

Answer 4

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Ok just how much money do you have to spend? flooding fuel into your cat converters will cause the cats to fail. Then that is several thousand dollars fo cats and o2 sensors. I see this issue when people do not warm up the engine and drive enough each time the car is started. Injectors can leak down with or with out being plugged in. Better get a proper diagnosis preformed. Good Luck

Answer 5

your engine may not be burning up all the fuel and you could be getting lots of fuel into your pcv valve. There are lots of reasons why an engine wouldn't start which might result in gas in the intake manifold.

Answer 6

take the spark plugs out, and dry them.

pull the fuse out for your fuel pump and injection system, and disconnect the power to the CDI pack or coil.

Put your foot right down on the gas and crank the engine for 10 seconds.

put spark plugs back in, and reconnect ignition system.

crank the engine (it may run for a few secs or it should at least stumble)

if it does offer to start, reconnect the fuel injection and fuel pump.



this might not work on new cars.

so for newer cars, I suggest just drying the spark plugs, and then trying to crank the engine with the gas pedal fully pressed. cranking for a few secs at a time with short breaks.

Answer 7

it could have a bad fuel cut off solenoid. there should not be raw fuel in the intake manifold.

Answer 8

gasoline in liquid for is not really flammable, that could be the issue.

floor it and try again.

Answer 9

WHAT YEAR AND MAKE OF TRUCK ALSO ENGINE SIZE WOULD BE HELPFUL ........