Smelling gasoline from exhaust

1994 FORD BRONCO
289,900 MILES • 5.0L • V8 • 4WD • AUTOMATIC
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SHAMAN444
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Tried to pull codes with handheld reader. 512 - no read only memory or something books says. There was white smoke from exhaust so i put in liquid head sealer. Didn't seam to help much. Changed 4 spark plugs, had oil residue on thread and tips were charred black. Not too knowledgeable about cars trucks . Any help would be great. Thanks in advance.
Jan 10, 2020 at 4:17 PM
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ASEMASTER6371
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Good evening,

That stuff you added was junk. All that does is clog up the radiator and the heater core.

https://www.2carpros.com/articles/head-gasket-blown-test

As far as the smoke, white indicates burning coolant. That most likely comes from a failed head gasket. That would result in all the other issues as well.

https://www.2carpros.com/articles/white-smoke-or-steam-coming-from-the-exhaust-pipe

Roy
Jan 10, 2020 at 4:46 PM
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SCGRANTURISMO
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Hello,

Well, I think you are on the right track. Excessive white smoke from the exhaust is a sign of coolant being burnt in your vehicle's engine's combustion chambers, and your spark plugs sound like they either oil fouled or carbon fouled. Oil fouled spark plugs, again, would point towards a blown head gasket[s]. The only "pour in" head gasket sealer I would recommend, would be Blue Devil, which is available at any auto parts store. It costs a little more, but it has a higher success rate. I would recommend replacing the head gaskets, instead of using a head gasket sealer, though. In the diagrams down below I have included a diagram explaining how to read spark plugs, and the instructions for the removal and installation of the cylinder head gaskets on your vehicle, as well as the Original Equipment Manufacturer[OEM] part number for your reference as well. Please go through these guides and get back to us with how everything turns out.

Thanks,
Alex
2CarPros
Jan 10, 2020 at 4:53 PM
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SHAMAN444
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Thank you for your reply. Would the smell of gasoline while driving and extremely slow acceleration from stop be from blown head as well? The truck seems to act like it's trying to accelerate from third gear and is hard shifting in drive from reverse. Reverse seems to accelerate fine. Plus my overdrive button is no longer lit or turning on, as well as low range button.
Jan 10, 2020 at 7:43 PM
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SHAMAN444
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My ABS has been out forever too.
Jan 10, 2020 at 7:44 PM
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SCGRANTURISMO
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Hello again,

This could be a problem with your transmission fluid and filter needed to be changed. In the diagrams down below I have included the instructions from the vehicle manufacturer on changing the transmission filter and transmission fluid. Please go through this guide and get back to us with how everything turns out.

Thanks,
Alex
2CarPros
Jan 10, 2020 at 8:09 PM
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SHAMAN444
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Thank you for your help. I will let you know how it goes. :)
Jan 12, 2020 at 11:43 AM