Quote:
Originally Posted by catrains
I never seen one plugged up usually they stay open /leak down .but a check valve plugged up would do it.
could also be booster guts plugged it up .. then need both or just blow out the check valve.
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Trust me. I tried everything before replacing it. I got lucky and my wrecked 96 parts truck had one that I robbed to get my wife back on the road. A new one was around 50 dollars.
Spraying it with brake cleaner and blowing it out and then shooting a little spray lube had me thinking I fixed it. Then a few days later it happened again in the morning. (She almost hit the tree at the garage) So I just took the one out of the 96. Sadly the bad one only had 125,000 miles on it and the 96 had 230k miles and sat for a year. But, problem never came back after changing it to this day. It's been 2 years now.
A few threads here pointed to the check valve and that info pointed me in the right direction.
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