2004 Chevrolet Impala gasoline in air cleaner housing.

Tiny
CHEVYBIG10
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 170,000 MILES
I was not driving the car in question. A single mother of 2 asked me for help in fixing the problem with her car. Not making any money on this repair. She said she had just stopped to get gasoline and after leaving the gasoline station the car started to run rough and she could smell gasoline coming from under the hood. There was gasoline dripping out of the bottom of the aor cleaner housing.
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Sunday, August 25th, 2013 AT 5:50 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
AOR housing? Do you mean AIR filter housing? If so, that is odd because the fuel is injected into the engine. Have you checked to see if there is something leaking that may have allowed fuel to run down the air box?
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Sunday, August 25th, 2013 AT 7:53 PM
Tiny
CHEVYBIG10
  • MEMBER
Yes, air filter housing. Misspelling, Sorry about that. Yes I know it is odd. I have worked on and rebuilt engines, transmissions, worked on electrical and have mechanic experience working on automobiles for 43 years. I am 59 years old and have worked on small and large engines. I have never encountered this before. I do not do this for a living. I was hoping someone had run into this problem before and could share the answer to this problem. The motor was turned over and no notice of a fuel leak. The motor did not sound out of timing.
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Sunday, August 25th, 2013 AT 8:37 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Is the car running now? Have you checked the fuel rail and fuel lines for leaks? Fuel is directly injected into the engine. Thus, I don't see how it would come out the intake. UNLESS. You have an intake valve stuck open and it's dumping fuel into the cylinder and forcing it back into the intake. Have you checked compression?

PS: I noticed your user name, Chevy Big 10. I have a truck that I restored that is a Chevy Big 10 Step Side. Do you have one too?
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Monday, August 26th, 2013 AT 2:41 PM
Tiny
CHEVYBIG10
  • MEMBER
No it is not running. Motor spends over but will not start. A friend who runs a auto repair shop thinks that maybe the fuel pressure regulator diaphragm might of split and a large amount of fuel could be sucked back into the intake and maybe leaked into the air filter housing. Don't know. Very strange. The girl had the vehicle towed to a repair shop. Will Post later what they find. I did not have the time to troubleshoot the problem.
On the Chevy Big10 (GMC Heavy Half) trucks, they were produced in the mid to late seventies. They were a single cab long wheelbase fleetside pickups. They came from the factory with a heavy duty suspension with a 350 engine and I think a turbo 400 transmission. Basically they were half ton pickups with a heavy duty suspension and dual gas tanks. Fun to drive, could pull a 16 foot double axle trailer with no problems. Every once in a while I will see one with the original tan two/tone paint job with the decals on the back side of the bed. Big10 (Chevrolet) or
HeavyHalf(GMC).
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Monday, August 26th, 2013 AT 3:22 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Mine is a 78 Chevy, Big 10. It, however, is a 6 cylinder with a 6 foot step side. I purchased it from the original owner who was my neighbor at the time. I know it came as a Big 10. Would you like to see a pic of it? Let me know and I will upload one. Also, I thought the (and I could be wrong) Heavy Half was the 4wd version. I have no idea. I do, however, remember my neighbor getting it new and I laughed when I saw the Big 10 stickers on the rear fenders. Now, I love the old truck. I have been putting it in shows. I took 2nd place this past Saturday with it. And yes, it is a heavy duty 1/2 ton. I think there are 7 leafs on both sides of the rear axle. It rides like a 3/4 ton. Lol

Let me know if you want pics and if you have one too. One doesn't see them very often anymore. I only know where one other one is. A 15 year old kid is trying to rebuild it. It is in good shape for its age and especially being a PA truck. Everything rusts out around here.
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Monday, August 26th, 2013 AT 8:14 PM
Tiny
CHEVYBIG10
  • MEMBER
The car is repaired. The fuel pressure regulator which was replaced less than a year ago with a aftermarket part was the problem. It appears that the rubber diaphragm split open which would have caused the fuel pressure regulator to loose pressure and the gasoline would have been sucked through the vacuum hose directly into the intake manifold which would have created a flooding condition in the cylinders which would have gas fouled the spark plugs causing the motor to run rough and die. When the key was turned on and the electric fuel pump was running without turning the motor over it would flooded the intake with gasoline via the vacuum hose thus flooding the air filter housing. The oil pan also held gasoline in the motor oil. New fuel pressure regulator, spark plugs, air filter, oil filter and motor oil were replaced. The motor is running once again.
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Tuesday, August 27th, 2013 AT 9:02 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Great! I'm glad you got it going.
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Tuesday, August 27th, 2013 AT 1:59 PM

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