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NB1 evap system: possible to gut w/o CEL codes?

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NB1 evap system: possible to gut w/o CEL codes?

 
Old 09-10-2018, 05:31 PM
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Default NB1 evap system: possible to gut w/o CEL codes?



I have a friend with an unmolested federal '99 on the OE ECU. She's starting to get P0455 (large evap leak) codes, and is wishing she could just delete the evap system entirely. Based on DNM's diagram above, this looks relatively easy to physically delete and re-plumb. I've also read that Emilio recommends running the vent up to the factory overflow area, which is what I did when I deleted my NA charcoal canister. It looks to me that there are 3 sensors that would have to be fooled to run this setup on a factory ECU without throwing CEL's: the purge solenoid valve on the evap overflow canister by the intake manifold (#1), the fuel pressure sensor (#8), and the TPCV (#7).

Does anyone know if it's viable to re-plumb as above, but fool the OE ECU into thinking that everything is happy and functioning properly? I see plenty of people who have deleted the canister from the engine bay and just looped the vac lines on the purge solenoid. I'm curious if a similar defeat can be enacted on the pressure sensor & TPCV.

"No, it ain't worth it, just stop being cheap" is a perfectly acceptable answer.
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