Author Topic: 3.0 surges when warm and the brakes are applied........ (Read 2102 times)

Thomas P · « **on:** Mar 23, 2009, 11:01:09 PM »

My brothers motor starts surging when he puts the brakes on, but only after its warm, any idea whats up? Thanks in advance

MC387 · « **Reply #1 on:** Mar 24, 2009, 07:38:20 AM »

Try pinching the vacuum lin going to the booster. If that help then you have a bad booster.

Snowtoy · « **Reply #2 on:** Mar 24, 2009, 03:47:42 PM »

Did any of the vacuum lines get removed when you were replacing the T-belt?

You might also check for cracks in the vacuum lines. Idle surging when breaks are applied can also be from a vacuum leak.

What is the rpm at idle? An idle that is set to high can also cause a surge when sitting at a stop w/the breaks applied. Both my 3.0 and 22re will do this if I don't re-adjust the idle when done wheeling. I usually set the idle higher than normal when wheeling to keep the engine from stalling out when crawling.

Thomas P · « **Reply #3 on:** Mar 24, 2009, 07:10:49 PM »

thanx fellas, im gonna go over and see what i can find out!

NorCalToy · « **Reply #4 on:** Mar 24, 2009, 10:59:28 PM »

my truck does this every once in awhile and for me i just had to wiggle the TPS some and find its sweet spot and it goes away.

boggerunner · « **Reply #5 on:** Mar 25, 2009, 02:07:39 AM »

my 4runner doas the same thing, its a 22re, and annoying as hell in the drive through.

Author Topic: 3.0 surges when warm and the brakes are applied........ (Read 2102 times)

Thomas P

3.0 surges when warm and the brakes are applied........

MC387

Re: 3.0 surges when warm and the brakes are applied........

Snowtoy

Re: 3.0 surges when warm and the brakes are applied........

Thomas P [OP]

Re: 3.0 surges when warm and the brakes are applied........

NorCalToy

Re: 3.0 surges when warm and the brakes are applied........

boggerunner

Re: 3.0 surges when warm and the brakes are applied........

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	Author Topic: 3.0 surges when warm and the brakes are applied........ (Read 2102 times) 0 Members and 1 Guest are viewing this topic. Thomas P Silver Turtle Award Turtle Points: 109 Posts: 3,092 Member since Feb '06 3.0 surges when warm and the brakes are applied........ « on: Mar 23, 2009, 11:01:09 PM » My brothers motor starts surging when he puts the brakes on, but only after its warm, any idea whats up? Thanks in advance Logged '85 EFI X cab SR5. 42" Iroks, Dual ultimates etc. '84 Std. cab Yota, Chevy 4.3 swapped (makes v8's cry) '88 4 Runner 39.5" Iroks FJ80 front, taco rear elockers dual ultimates '07 Toyota Tundra crew max 5.7 (grocery getter/tow rig) '14 Camry SE SCX10 Honcho on roids! MC387 Rock Master Turtle Points: -4 Posts: 228 Member since Dec '06 Re: 3.0 surges when warm and the brakes are applied........ « Reply #1 on: Mar 24, 2009, 07:38:20 AM » Try pinching the vacuum lin going to the booster. If that help then you have a bad booster. Logged Snowtoy The 2.5K Group Turtle Points: 1403 Posts: 2,583 Member since Sep '03 Re: 3.0 surges when warm and the brakes are applied........ « Reply #2 on: Mar 24, 2009, 03:47:42 PM » Did any of the vacuum lines get removed when you were replacing the T-belt? You might also check for cracks in the vacuum lines. Idle surging when breaks are applied can also be from a vacuum leak. What is the rpm at idle? An idle that is set to high can also cause a surge when sitting at a stop w/the breaks applied. Both my 3.0 and 22re will do this if I don't re-adjust the idle when done wheeling. I usually set the idle higher than normal when wheeling to keep the engine from stalling out when crawling. Logged '90 black X-cab mod'd 3.0, 33's/4.88's, rear ARB, custom bumpers, sliders, safari rack, etc. '91 Blue X-cab 22re, 35's/5.29's,Truetrac front, ARB rear, dual cases, and custom Safari flatbed, bumper, interior. The money pit '87 Supra resto/mod Thomas P [OP] Silver Turtle Award Turtle Points: 109 Posts: 3,092 Member since Feb '06 Re: 3.0 surges when warm and the brakes are applied........ « Reply #3 on: Mar 24, 2009, 07:10:49 PM » thanx fellas, im gonna go over and see what i can find out! Logged '85 EFI X cab SR5. 42" Iroks, Dual ultimates etc. '84 Std. cab Yota, Chevy 4.3 swapped (makes v8's cry) '88 4 Runner 39.5" Iroks FJ80 front, taco rear elockers dual ultimates '07 Toyota Tundra crew max 5.7 (grocery getter/tow rig) '14 Camry SE SCX10 Honcho on roids! NorCalToy Official Super Badass The 2K Group Turtle Points: 77 Posts: 2,472 Member since Jun '07 IFS no longer! - Member #8342 Re: 3.0 surges when warm and the brakes are applied........ « Reply #4 on: Mar 24, 2009, 10:59:28 PM » my truck does this every once in awhile and for me i just had to wiggle the TPS some and find its sweet spot and it goes away. Logged '89 truck SAS sittin on 35's, Tacoma rear axle w/ E-Locker, welded front kneedownnate - You can go through life being scared of the possible, or you can have a little fun and tease the inevitable iɹǝʌo ǝɯ ııoɹ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı ~~IFS~~ boggerunner Silver Turtle Award Turtle Points: 9 Posts: 3,140 Member since May '06 Philberbuilt Re: 3.0 surges when warm and the brakes are applied........ « Reply #5 on: Mar 25, 2009, 02:07:39 AM » my 4runner doas the same thing, its a 22re, and annoying as hell in the drive through. Logged