92 Eldorado 4.9L spitting raw fuel out exhaust
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 92 Eldorado 4.9L spitting raw fuel out exhaust in Past Cadillac Vehicle Discussion; Already tried replacing the computer and the fuel pressure regulator and put new spark plugs and wires in and neither ...
  1. #1
    weekendwarrior44's Avatar
    weekendwarrior44 is offline Cadillac Owners Member
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    Already tried replacing the computer and the fuel pressure regulator and put new spark plugs and wires in and neither solved the issue, getting desperate here! Also, if anyone has happened to see my other threads, I had 2 hoses that I could not figure out where they attached to, could be related with the fuel spitting. Also, there is white smoke which I believe is fuel with condensation. Was driving when all of a sudden car started sounding like a lawn mower and engine did not feel as powerful when I stopped the motor was shaking pretty bad. Next day took it to the shop and I pulled over to check something and moved a spark plug that felt a little loose compared to the others. car felt a bit smoother but still rougher than normal and seemed to smoke a little less but still did quite a bit. I really appreciate anyone who can put useful information here.

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    EcSTSatic's Avatar
    EcSTSatic is offline Cadillac Owners Connoisseur
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    Stuck injector(s) perhaps. Stop driving it! Raw fuel is washing the oil off of your bearing surfaces and wearing out your engine! Your oil level is probably higher because you have gas in it.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    Check the injectors. Sounds like you may have one or more stuck (or commanded) open.

    You are not doing the CAT any good either.

  5. #4
    cctgene's Avatar
    cctgene is offline Cadillac Owners Fanatic
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    Are you getting the raw fuel out of your exhaust just at cold startup? If so you might check out your charcoal canister. Maybe your canister is saturated with gas or your purge solenoid is malfunctioning.
    Also, there are a bunch vacuum hoses that go to the canister, could that be where your two unattached hoses go?

    This may be out in left field, and have nothing to do with your problem, but thinking about your situation it popped into my head!

  6. #5
    weekendwarrior44's Avatar
    weekendwarrior44 is offline Cadillac Owners Member
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    Mechanic checked the injectors and said they're fine but I'm going to take a second look at those myself, also about the hoses, one of them is connecting from the canister and the other end is the one unattached. Thanks for the ideas

    ----------

    Also forgot to mention the CAT has been removed, has a piece of muffler instead

    ----------

    Sorry to reply a third time but i forgot to mention it's not just at cold start up, but i did start driving on the highway only to bring her home and when i eventually stopped at a light the smoking had gone but i still smelt the raw fuel and engine was still rough and sounding different. Mechanic did say it looked like there was fuel in the oil

  7. #6
    carnut is offline Cadillac Owners Master
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    Raw fuel would never make it out of a tail pipe! You are probably smelling unburned fuel but that un burned fuel would go into the crankcase (oil pan). Is this white "smoke" steam or smoke? Steam would evaporate very quickly whereas smoke would linger around the car. I think you're seeing coolant mixed with condensation exiting the tail pipe. I think the miss you are feeling is coolant being lost in a cylinder, indicative of a blown head gasket. IMO.
    Tankboy40 likes this.

  8. #7
    Ranger's Avatar
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    In an extremely rich condition raw atomized fuel can make it out the tail pipe. I'd bet it would be ignitable with a flick of your Bic.

  9. #8
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    It can ignite in the exhaust all by itself. It's called a "muffler report", and can easilly cause exhaust damage.

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    EcSTSatic's Avatar
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    Quote Originally Posted by weekendwarrior44 View Post
    Mechanic did say it looked like there was fuel in the oil
    Have you never cleaned parts with gas or kerosene? That's what you are doing to your bearings.

  11. #10
    Ranger's Avatar
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    Drill a hole in the exhaust pipe. Screw a spark plug into it and run a hot wire to it through a toggle switch to impress your friends and neighbors.
    vincentm likes this.

  12. #11
    EcSTSatic's Avatar
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    Quote Originally Posted by Ranger View Post
    Drill a hole in the exhaust pipe. Screw a spark plug into it and run a hot wire to it through a toggle switch to impress your friends and neighbors.
    And get a copy of the movie Grease

  13. #12
    cctgene's Avatar
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    Re: 92 Eldorado 4.9L spitting raw fuel out exhaust

    There is a vent hose on your canister that is routed to the area of the left coolant fan and it is open ended. The purpose of this hose, in the event of the canister purge solenoid malfunction, is to vent the vapors down preventing any vapor from entering the passenger compartment via the car's ventilation system.

    The above is from the 92 FSM.

    If your purge solenoid is not opening and the vent hose is not routed correctly, it could be the source of your gasoline smell.

    Just a thought!

  14. #13
    weekendwarrior44's Avatar
    weekendwarrior44 is offline Cadillac Owners Member
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    Quote Originally Posted by EcSTSatic View Post
    Stuck injector(s) perhaps. Stop driving it! Raw fuel is washing the oil off of your bearing surfaces and wearing out your engine! Your oil level is probably higher because you have gas in it.
    Thanks to everyone for the replies, it turns out it was a stuck injector!

    ----------

    Quote Originally Posted by cctgene View Post
    There is a vent hose on your canister that is routed to the area of the left coolant fan and it is open ended. The purpose of this hose, in the event of the canister purge solenoid malfunction, is to vent the vapors down preventing any vapor from entering the passenger compartment via the car's ventilation system.

    The above is from the 92 FSM.

    If your purge solenoid is not opening and the vent hose is not routed correctly, it could be the source of your gasoline smell.

    Just a thought!
    Thanks, saw it hanging there and thought it must go to something

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