catalytic converter and petrol smell (1 Viewer)

[64fabius]

Hi guys, have you ever heard of petrol smell from exhaust pipe and catalytic conveter failure?
On my '99 LC 100 I smell like unburnt petrol from exhaust pipe especially when engine idles. Someone told me that the problem might be injectors but someone else catalytic converts.
Up to now I've changed: fuel pump, vapour canister system, ventilation hoses and valves, 02 sensors. Techstream detected no DTCs.
Any thoughts regarding this?

 

[AlpineAccess]

Hi guys, have you ever heard of petrol smell from exhaust pipe and catalytic conveter failure?
On my '99 LC 100 I smell like unburnt petrol from exhaust pipe especially when engine idles. Someone told me that the problem might be injectors but someone else catalytic converts.
Up to now I've changed: fuel pump, vapour canister system, ventilation hoses and valves, 02 sensors. Techstream detected no DTCs.
Any thoughts regarding this?

Sounds like a rich condition, could be something with the cats but would be reading a code most likely.

Do you smell unburnt gas even after it's warmed up?

 

[64fabius]

I smell unburnt gas both warm and cold engine. No codes on Techstream. Rarely it happened a difficult starting-up and in that occasion, smell increased and a white-blue smoke appeared.

 

[AlpineAccess]

I smell unburnt gas both warm and cold engine. No codes on Techstream. Rarely it happened a difficult starting-up and in that occasion, smell increased and a white-blue smoke appeared.

To confirm, this is a petrol motor and not diesel.

Second, do you have any other performance issues? Stumbling idle, hesitation when accelerating, etc?

Has this been an issue for a long time?

 

[abuck99]

These are signs that your Fuel Pressure Regulator may not be working properly.

 

[64fabius]

These are signs that your Fuel Pressure Regulator may not be working properly.

I changed it few weeks ago but the problem remained.

 

[64fabius]

To confirm, this is a petrol motor and not diesel.

Second, do you have any other performance issues? Stumbling idle, hesitation when accelerating, etc?

Has this been an issue for a long time?

Performances seem ok. In fact, no hesitation appears during accelerating and idle is OK. Only petrol smell remains at tailpipe.