Forums/Z31P/z31-repairs-forums engine-mechanical/Exhaust smells of heavy gas.....

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Spazzymcgee: (2019-01-13 18:56:46)

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?

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JSM: (2019-01-14 01:01:28)

Doubtfully related.

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Spazzymcgee: (2019-01-14 01:40:08)

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.

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Z_Karma: (2019-01-14 02:24:36)

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.

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JSM: (2019-01-17 03:51:28)

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

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drnict61: (2019-01-23 18:59:37)

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

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Dunkine: (2019-01-30 01:17:37)

Did you check the ecu for codes?