lethal6
Your Mom's Moderator
Staff member
Registered VIP
Registered OG
5+ Year Member
10+ Year Member
When sitting at a light the other day I let my foot off the brake pedal and noticed that the rpms went down. I hadn't noticed this before so when I got to work I checked some things.
With the vehicle at idle and sitting still when I push my brake pedal the rpms go up to around 1000 and when I let my foot off it goes back down to idle ~800.
I also noticed sometimes with my foot on the pedal the idle will fluctuate from idle to 1000 and back a couple times. Doesn't do it all the time but it definitely does go up to around 1000 every time when I push the pedal. Most of the time it will sit at 1000 until I let my foot off.
Is this normal because of brakes running off vacuum or is there a leak? I found an old post talking about this on HT and RonJ showed a way to test the booster and the check valve. Will do that tomorrow, but just want to know if that is normal or not.
With the vehicle at idle and sitting still when I push my brake pedal the rpms go up to around 1000 and when I let my foot off it goes back down to idle ~800.
I also noticed sometimes with my foot on the pedal the idle will fluctuate from idle to 1000 and back a couple times. Doesn't do it all the time but it definitely does go up to around 1000 every time when I push the pedal. Most of the time it will sit at 1000 until I let my foot off.
Is this normal because of brakes running off vacuum or is there a leak? I found an old post talking about this on HT and RonJ showed a way to test the booster and the check valve. Will do that tomorrow, but just want to know if that is normal or not.
