V6 petrol smell on cold start-up in cabin

[Norbertflyer]

I get a fuel smell through the air vents on a cold start-up. It's a bi fuel 2003 model with 121k miles and the smell only occurs on cold start up for a few seconds (car is petrol running for the first minute, until it swaps to LPG). At no other times do I get the fuel smell.
Switching the air circulation fan off at cold start-up prevents the fuel smell from entering the passenger area.
The inlet manifold gaskets were recently changed, but the fuel smell has only occurred 6 months after this work.
Any thoughts on possible causes?
Richard

[JerryL770]

Posted in the wrong forum!

There's no proper V6 E-types

[Norbertflyer]

JerryL770, I'm definitely in the correct forum page. You may be confused.

There could be an indexing issue with the forum site perhaps, but it doesn't look out of order to me.

[J44EAG]

This thread is correctly positioned in the X350 section.

Indeed odd that Jerry is seeing it in the E-type section.

Mike K.
Moderator.

[Norbertflyer]

Update: found the cause of the petrol smell on start up - an incorrectly fitted hose from the manifold to the throttle body. Wedged solid, I had assumed that the pipe was properly connected and sealed, but it wasn't. Easy fix with a cable tie to properly seal the pipe to the throttle body. This fix also helped the tickover stability and 10% throttle position hesitation.
Richard