Question about 1991 Ford F150

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Smelling raw fuel from exhaust

Got a 91 ford F150 with a 4.9 straight 6 bought it from a friend.Before he park it last year there was nothing wrong with it. Now when started smell raw fuel from exhaust an check engine light is on. Runs real ruff an if at all. please help..

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Fuel pressure regulator faulty or dirty

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It is shows more petrol in the combustion chamber check first sparkplugs put new plugs,if you have stil have problem the cylinder head needs to remove means valves inlets and exhaust to granding to make correct angle valve seat.

Posted on Oct 23, 2008

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Mitsubisihi magna 1999 v6 has pettrol steaming from exhaust and bad fuel smelling vapour comes out of the exhaust


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2004 Toy Highlander.
what you replaces is of no bearing.
what counts is realty.
find the leak.
if it really is raw gas, do not drive car or garage it.
park it far from home and people. (curb it.)
gas fumes if not real raw fuel (liquid) can come from EVAP canister
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Runs ******


if it smells like raw, unburned fuel, you may have an injector stuck open. i assume it clears up and drive good after a short warm up. there will be evidence of which cylinder has the bad injector by pulling out the spark plugs. the affected cylinder will be washed clean and smell like unburned fuel. the plug may also be "wet black" and of course smell like raw fuel.

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is there a leak in your fuel line, or possibly your fuel filter, if you see raw gas leaking, then it is dangerous for you tio continue to drive it, it only takes one spark to ignite it, however, if the smell is just your car burning rich and the exhaust has holes in it, it will smell up the inside of your car. And yes if your carb. is burning too rich then it needs adjusted. Wasting your fuel, and overloading your engine. I hope some of this was helpfull.

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Burning smell


The sulphur smell is the result of the emmisions control system. I have an 06 Expedition with the exact same engine and emmisions system as yours. When the engine is cold, you don't smell that sulphur smell, but as soon as the engine gets to operating temperature, the exhaust gasses smell sulphury. Nothing wrong with your ride - they all do that. The dealership sometimes spray the underbody with some type of rubber to protect the vehicle against rust. This rubber stuff sometimes get sprayd on the exhaust as well and then you will smell "burning tires" after driving the vehicle. This will go away after a few thousend miles though.

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