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..
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert whose answer got voted for 20 times.
An expert who has answered 20 questions.
Re: smelling raw fuel from exhaust
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.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
stop shooting engine and leaks will , decrease some. LOL !
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
hose fell off.
first look for injector leaks (outside body)
and fuel hose leaks, (look at these first as they are 10x more dangerous that others)
does the PCM scans show DTC errors?
scan it, what do you have.?
if there is raw fuel dripping from the exhaust manifold that means
the INJECTors are stuck on or leaking, this is one of the most dangerous conditions on all EFI cars.
they to look more carefully
or better get a ASE mechanic to check the car out.
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.
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.
You rubbed through the fuel tank or cracked it and it has a small leak. They make a fuel tank repair kit you can by a a auto parts store some times they work and sometimes they don't. If gas is spraying or leaking on the exhaust you could have a fire. I have drained a tank and put a screw with a fiber washer in the hole and then covered it with a 1/2 inch if silicone rubber it lasted for 5 years. Your fuel lines and filter are usually up on the side of the frame and should be ok
Replace the crank sensor on your car. The crank sensor tells when the plugs should fire. When it decides to go bad, the cylinders will overly fuel themselves because it's not firing at the right time creating your fuel 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.