Brake Booster Effecting RPM's?
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Brake Booster Effecting RPM's?
I have noticed my 91 Chevy is lacking power in D and OD while going down the highway and when i tap my brake pedal my rpm's will shoot up suddenly from around 200-800rpms depending on the position of the throttle and how fast I am traveling but when it does this it is not shifting down, but instead just gaining the rpms could this possibly be linked to a defective brake booster? also my brake light is flashing 4 times and slow on the 4th flash idk if this is also related but I would also like to know what that is indicating
#2
I had a 91 GMC Ex cab and from what I remember it had a vac operated brake booster. If the booster diaphram has a hole in it you will notice the engine change rpm at an idle for sure. I cant help you with the brake light flashing but if your unsure about repairing this your much better off getting a mechanic to look at it. Brakes are something you need!
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well i have a replacement brake booster but i was just unsure if that could be the cause for my weird rpm fluctuation and im fairly capable of changing it but i was just curious if anyone had any input on anything else i may be overlooking but thank you for he help
#4
If you disconnect the vac line and plug it and the rpm has no change when you step on the brake you will know your booster has a leak, Good luck with the booster change.
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and it has a large loss of power in OD and at a stop while holding my brake the brakes will slowly bleed off so im leaning to a vac leak in the booster
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randys94
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May 14th, 2009 9:39 PM