Exhaust smells of heavy gas.....

[Spazzymcgee]

Sooooo can not seem to figure this situation out for the life of me.. Got new rack&pinion put in and when I go to start up I get the usual normal startup but a HEAVY smell of fuel out the back....

Any thoughts?

[JSM]

Doubtfully related.

[Spazzymcgee]

Well yes I know this but ideally what would cause this smell to randomly just start. I've never had this happen on any of my other Zeds.

[Z_Karma]

Two thing off the top of my head:

Leaking FPR: A failed diaphragm can cause this. Pull the vac hose from the top of it and see if it smells like raw fuel.If it does, replace the FPR.

Leaking injector: Inspect the sparkplugs and see if one of them are wetter than the others with raw fuel.
Or install new plugs and take a drive for a few miles then pull them and see which one fouls first.
The FSM has a injector test procedure too,

My 84T has a leaky fpr that I've been neglecting replacing until the weather warms up.

[JSM]

Failed CHTS too if it’s just exhaust fumes your smellling

[drnict61]

A faulty or missing O2 sensor will cause an excessive rich condition, too

[Dunkine]

Did you check the ecu for codes?