Join Date: May 2014
Location: San Andreas Fault Zone
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Re: Smell When Driving
Can you clarify "the smell"?
There is no similarity between the smell of raw gasoline and "something burning".
Are you smelling raw gasoline, the smell of hot engine oil, the sulphurous smell of gear oil, or something else burning, with a burning cardboard smell? Each is very distinctive.
If the service was complete, the dealer would have lubed all the zerk fittings on the driveshafts. After lubing the U-joints, some grease will inevitably get flung out, and onto the exhaust pipe, where it will get heated during engine operation, and will smoke a bit (at least until it gets burned off) during periods of higher engine load, like when climbing a grade.
With the brake fluid flush and power steering fluid change, there is the possibility that some fluid may have been splashed onto an exhaust manifold or other surface that gets hot.
The FJ also uses an organic composition rear heat shield over the exhaust system behind the muffler. This is held on by some small stamped fasteners. It sometimes happens that one of these fasteners falls off, or the heat shield deteriorates and falls down so it can contact the exhaust pipe. Strangely enough, this material can actually "combust" and slowly burn like a piece of charcoal.
Climb under the truck and inspect the exhaust pipes directly across from the U-joints, looking for any grease that may have gotten flung onto the pipes.
Check the condition of the rear heat shield, and make sure that it is not contacting the pipe.
Last edited by FJtest; 12-10-2018 at 08:22 PM.