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Quick Links: Wiring at rear for brake, and running lights. Is there a oil for both differential and transmission. 1st Gen How-To: Change your belts (P/S, A/C, Alternator) 2.4/2.7L Any thoughts on this new aftermarket carrier bearing? LCA Bushing time What are you using to monitor Fuel Pressure?

Need some help with Vaccum Issue

Discussion in '1st Gen. Tacomas (1995-2004)' started by Allex95, Jul 15, 2020.

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Jul 16, 2020 at 10:04 PM

#21

#21
Allex95 [OP] Well-Known Member

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allex

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96 Tacoma 4x4 2.7l 4 cylinder

b_r_o said: ↑

Manifold one is called the purge valve and it is closed at all times until commanded open

Canister one is called the vent valve and its the opposite. Normally open until commanded closed

If the vent valve near the canister sticks open it will fail a leak test (small leak/large/gross/etc) but it won't usually cause running symptoms like a rough idle.

If the purge valve at the intake manifold leaks that's like a direct vacuum leak through the canister straight into the engine. It will cause a rough idle. Since it can't hold vacuum during a leak test it can code as well.
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awesome thank you for the info and all the help. appreciate it

Allex95, Jul 16, 2020

#21

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