Procedure for smoke test
10-05-2020, 11:05 AM
#1
Member
Thread Starter
Procedure for smoke test
Hi all, my 2004 ML350 VIN 4JGAB57E64A497435 has a CEL for P0455 (large leak in evap system). I bought a smoke machine off ebay and it works great.
I plugged it in the evap line under the hood and I saw smoke pour out near the passenger side exhaust. It then occurred to me that I probably needed to cap the vent for the evap system.
Does anyone know where/which vent tube I need to plug to properly test the system?
Thanks,
I plugged it in the evap line under the hood and I saw smoke pour out near the passenger side exhaust. It then occurred to me that I probably needed to cap the vent for the evap system.
Does anyone know where/which vent tube I need to plug to properly test the system?
Thanks,
10-09-2020, 11:50 AM
#2
Member
Thread Starter
Update: I found the vent pipe tucked up under the rear bumper - I plugged it after smoke started pouring out and it didnt leak from anywhere! Good news i guess. After trying to listen for a ticking in the purge valve under the hood, it was dead quiet. I will swap it out and report back. The one time I dont just throw parts at it, it seems to be the cheapest/easiest to swap part.
