Novak Conversions Jeep Wrangler TJ engine mounts

Chasing P0456 (Small Evap Leak)

josephbelttj

Member
Original poster
Joined
Oct 29, 2023
Messages
43
Location
TN
New Mopar gas cap. I’ve replaced some short runs of hose near the engine with silicone. I’ve replaced the evap pump in the passenger side rear and purge valve in the engine compartment.

If I smoke test from the fuel fill neck it holds pressure and I see no smoke. When testing from the exhaust manifold nipple nearest to the firewall (transitions to check valve to small hard line), it holds pressure and no smoke.

When I smoke test from the manifold nipple towards the front of the vehicle, which connects to a hard line on the drivers side leading towards the rear, I get smoke from the passenger side rear (evap pump, charcoal canister area). Is this run of line normally vented to atmosphere with the vehicle at rest (normal to see smoke)?
 
There is a vent hose on the evap canister. That has to be blocked. I like to run the smoke machine until I see smoke coming out of the vent, and then block it off. That way the leak shows up faster with thicker smoke.
 
Novak Conversions Jeep Wrangler TJ engine mounts