I’m looking for technical help or recommendations on: __fuel smell
Hi all, when I drive my MX5 there is an intermittent, and quite overpowering smell of petrol in the cabin.
It’s definitely not coming from under the bonnet, and doesn’t smell much in the boot. I have done all the obvious checks - fuel filler OK, all fuel lines are good etc, There are no visable fuel leaks / drips etc, so I think it’s a venting issue.
I popped into C&C Sparks ( MX5 specialist ) and Colin suggested removing the tank cover behind the seats to look for leaks. I did this - no leaks. I suspected the ‘fuel vapour filter’ was the problem, so removed & blew some pressure ( breath ) through it, and cleaned with Carb cleaner. I though this had solved the issue, but it doesn’t seem to have done. The charcoal can under the bonnet hasn’t been deleted, and looks in good shape ( it’s a 35K mile car, despite being 19 years old ).
Sounds too simple but make sure that the fuel cap seal is in good condition (making a good seal) and that the cap it tight. I’ve heard of this being an issue in the past, especially with chrome filler flaps fitted where it’s more difficult to get a good perch on the cap to tighten it. The fuel smell is drawn in by the void created behind the windscreen.
Having driven it a few times now, I think the problem WAS the fuel cap! I wasn’t turning it till it clicked. It was a bit smelly in the cabin today, after sitting in the sun with the top up. But driving top-down, it doesn’t smell at all. Rooky error - thanks for the advice. Pic was taken at Leith Hill, where there are some lovely roads, as well as lovely walks.
