1991 454 tbi
I am having what I believe to be a vacuum leak (1k rpm idle, rough and hunting idle, very rough idle when in gear, surging when going up steep hills, low power). The idle does not seem to change when brake is applied in park. Brakes seem to work ok. The truck is new to me though, and I don't know what it feels like when working properly.
It looks like brake fluid has leaked from where the master cylinder meets the booster at some point in time. If it did, could this be causing my vacuum leak now? Is it safe to drive like this? What else can I do to rule the booster out of my vacuum issue or prevent an accident?
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I am having what I believe to be a vacuum leak (1k rpm idle, rough and hunting idle, very rough idle when in gear, surging when going up steep hills, low power). The idle does not seem to change when brake is applied in park. Brakes seem to work ok. The truck is new to me though, and I don't know what it feels like when working properly.
It looks like brake fluid has leaked from where the master cylinder meets the booster at some point in time. If it did, could this be causing my vacuum leak now? Is it safe to drive like this? What else can I do to rule the booster out of my vacuum issue or prevent an accident?
View media item 32719View media item 32720