thegawd
I'm Done!
- Joined
- Feb 29, 2020
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if the vacume booster is leaking bad you will hear it in the cab as it leaks around the diaphram of the plunger where the peddle hooks up. it wont apply but on an obd2 you can watch the short term and long term fuel trims rise all the way up to 100% if you hold the brakes long enough. then it will fall.on its face and possibly stall. I had it fail in my burb and it wasnt fun coming up to a stop sign.... but it turns out it was leaking prior to the catastrophic leak, I just couldnt hear it as after I replaced the booster my truck ran much better.
Al
Al