My brake booster is making noises...when I drive - Page 2 - Toyota 4Runner Forum

Rancho5 · 03-29-2020, 11:24 PM

Resurrecting one of my threads from last year...

I bought another ABS pump from a salvage yard and switched it in yesterday. I thought everything was great until today when the car lurched forward on me as I was coming to a slow stop. Same problem, different ABS pump.

I power bled the brakes using my OBD scanner but didn’t bleed each selonoid since I figured it was done when it was power bled.

I’m open to ideas. Thanks

rightyouareken · 03-29-2020, 11:27 PM

Why do you think it’s a brake issue? Sounds more transmission related (rough downshift to first) to me. Try going the same thing that normally causes it but slip the transmission into neutral before it happens and see if that prevents it.

Rancho5 · 03-29-2020, 11:42 PM

Not thinking it’s a tranny issue since there’s no hard shifting or anything... and the pedal gives a little when it happens. Forgot to mention that, sorry.

Jethro87 · 05-11-2024, 03:56 AM

well for a 5 year old thread I was hoping for a resolution. From what I read, brake booster works of vacuum lines so maybe replacing old leaky hoses is the first step if bleeding lines doesn't fix it. The noise is worrysome but when i stopped hard on the brake and got a firm pedal with no response until I pumped it then I was concerned. It brakes great normally, with noise sometimes under first brake application, but on second brake pump.. no noise ever.

1999 4runner bought 20 months ago.

Edit: I was replying to a thread a brake booster noise which I'm not experienced with. I clicked submit and it shows me a different previous thread. Still any advise is appreciated.

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