How slow is "slowly"?
Thread Starter
Drifting
Joined: Nov 2015
Posts: 1,714
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Finalist 2020 C4 of the Year - Unmodified
How slow is "slowly"?
Checking my '87 EGR solenoid per FSM, first bit is making sure it's holding vacuum when activated.
FSM says "The vacuum may bleed off slowly, but this should not be considered a fault." My test, the solenoid went from -5psi to 0 in about seven seconds. Is that "slowly" or "fasty"? Ie, solenoid okay or need replaced?
FSM says "The vacuum may bleed off slowly, but this should not be considered a fault." My test, the solenoid went from -5psi to 0 in about seven seconds. Is that "slowly" or "fasty"? Ie, solenoid okay or need replaced?
Thread Starter
Drifting
Joined: Nov 2015
Posts: 1,714
Likes: 331
Finalist 2020 C4 of the Year - Unmodified
UPDATE:
1) 7 seconds may be alright. The ECM may be activating by pulse, so vacuum will go down eventually. To confirm, bench test the solenoid. Hook up 12V to the correct leads and retest vacuum. My old one was fine with this test.
2) Do the same bench test for a new one. Mine from ZIP failed right away. Good thing I paid for 2 day air.
1) 7 seconds may be alright. The ECM may be activating by pulse, so vacuum will go down eventually. To confirm, bench test the solenoid. Hook up 12V to the correct leads and retest vacuum. My old one was fine with this test.
2) Do the same bench test for a new one. Mine from ZIP failed right away. Good thing I paid for 2 day air.
