1996 pontiac sunfire
2.2L
work done prior = Changed 1 of the fuel injectors
work done to repair = none
tech = KK
question = I had a fuel injector leaking around the O ring. I took the
leaky injector out and put in a brand new one with a new o ring. When I
put everything back together the car wouldn't start. There is gasoline
blowing out of the exhaust linkage bt the manifold. I removed all the
spark plugs and the fuel is spewing from the far right cylinder. Right
beside the one that I changed the injector on. None of the other cylinders
are doing this just the far right one. I took everything apart again
and looked at that particular injector and put another one in its place,
put it all back together and still the same thing. Gas spewing out the
cylinder when trying to start the car. Any ideas on what could cause
this?
KK:
A leaking fuel pressure regulator is a common failure for having the cylinder(s) fill
with gasoline. When they leak, fuel gets pumped into the vacuum line, and then
into the cylinders.
It is also possible that there is some debre in the end of the fuel rail, at cylinder #
4 injector area, and after having the rail off, the debre is floating around and
plugging up that injector. Let me know what you find.
Back
2.2L
work done prior = Changed 1 of the fuel injectors
work done to repair = none
tech = KK
question = I had a fuel injector leaking around the O ring. I took the
leaky injector out and put in a brand new one with a new o ring. When I
put everything back together the car wouldn't start. There is gasoline
blowing out of the exhaust linkage bt the manifold. I removed all the
spark plugs and the fuel is spewing from the far right cylinder. Right
beside the one that I changed the injector on. None of the other cylinders
are doing this just the far right one. I took everything apart again
and looked at that particular injector and put another one in its place,
put it all back together and still the same thing. Gas spewing out the
cylinder when trying to start the car. Any ideas on what could cause
this?
KK:
A leaking fuel pressure regulator is a common failure for having the cylinder(s) fill
with gasoline. When they leak, fuel gets pumped into the vacuum line, and then
into the cylinders.
It is also possible that there is some debre in the end of the fuel rail, at cylinder #
4 injector area, and after having the rail off, the debre is floating around and
plugging up that injector. Let me know what you find.
Back
Other related questions
High pressure fuel is supplied by an electric pump in the fuel tank. Pressure is regulated by the
fuel pressure regulator. The fuel injector is a solenoid operated device, controlled by the
Powertrain Control Module (PCM), that meters pressurized fuel to a single engine cylinder. The
PCM energizes the high-impedance (12.0 ohms) injector solenoid to open a normally closed
ball valve. This allows fuel to flow into the top of the injector, past the ball valve, and through a
director plate at the injector outlet. The director plate has four machined holes that control the
fuel flow, generating a spray of finely atomized fuel at the injector tip. Fuel from the injector tip
is directed at the intake valve, causing the fuel to become further atomized and vaporized
before entering the combustion chamber. An injector stuck partly open can cause a loss of
pressure after engine shutdown. Consequently, long cranking times would be noticed on some
engines. A leaking fuel pressure regulator can also cause this.
fuel pressure regulator. The fuel injector is a solenoid operated device, controlled by the
Powertrain Control Module (PCM), that meters pressurized fuel to a single engine cylinder. The
PCM energizes the high-impedance (12.0 ohms) injector solenoid to open a normally closed
ball valve. This allows fuel to flow into the top of the injector, past the ball valve, and through a
director plate at the injector outlet. The director plate has four machined holes that control the
fuel flow, generating a spray of finely atomized fuel at the injector tip. Fuel from the injector tip
is directed at the intake valve, causing the fuel to become further atomized and vaporized
before entering the combustion chamber. An injector stuck partly open can cause a loss of
pressure after engine shutdown. Consequently, long cranking times would be noticed on some
engines. A leaking fuel pressure regulator can also cause this.
Pontiac Gas Leak
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