Exhaust smells of heavy gas.....

Spazzymcgee

Senior Member

Posts: 108
#1

Exhaust smells of heavy gas.....

01-13-2019, 01:56 PM

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

Senior Member

Posts: 279
#2

01-13-2019, 08:01 PM

Doubtfully related.

Jeff
71 240z

80 280zx 10th Anniversary

88 300zx Turbo, 89 300zx Turbo

Datsun Jeff
Spazzymcgee

Senior Member

Posts: 108
#3

01-13-2019, 08:40 PM

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

Administrator

Posts: 3318
#4

01-13-2019, 09:24 PM

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.

84 AE/Shiro #683/Shiro #820/84 Turbo
2 likes
JSM

Senior Member

Posts: 279
#5

01-16-2019, 10:51 PM

Failed CHTS too if itâs just exhaust fumes your smellling

Jeff
71 240z

80 280zx 10th Anniversary

88 300zx Turbo, 89 300zx Turbo

Datsun Jeff
drnict61

Junior Member

Posts: 14
#6

01-23-2019, 01:59 PM

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

Senior Member

Posts: 255
#7

01-29-2019, 08:17 PM

Did you check the ecu for codes?