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89 3.0 toyota truck idle issues
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justtoold
New User
Aug 16, 2012, 4:21 PM
Post #1 of 9
(3045 views)
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89 3.0 toyota truck idle issues
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I have a 89 1 ton Toyota truck 240000 mi just tuned up ,had 1 injector and fuel pump replaced ,but when you stop with foot on the brake the idle surges up and down until you let off the brake,but at times it idles OK.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 16, 2012, 4:28 PM
Post #2 of 9
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Re: 89 3.0 toyota truck idle issues
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You may have a vacuum leak in the brake booster. Try pinching off the hose and see if the problem stops.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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justtoold
New User
Aug 17, 2012, 3:54 PM
Post #3 of 9
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Re: 89 3.0 toyota truck idle issues
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thanks, I've tried that, still surges.
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Hammer Time
Ultimate Carjunky
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Aug 17, 2012, 4:01 PM
Post #4 of 9
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Re: 89 3.0 toyota truck idle issues
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That's the only thing with any relationship to the brakes.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 17, 2012, 4:34 PM
Post #5 of 9
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Re: 89 3.0 toyota truck idle issues
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Hose itself could be leaking. Take it off and plug it at engine and bet the idle issues disappear,
T
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Hammer Time
Ultimate Carjunky
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Aug 17, 2012, 4:36 PM
Post #6 of 9
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Re: 89 3.0 toyota truck idle issues
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Yes, but that wouldn't be triggered by stepping on the brake.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 17, 2012, 4:41 PM
Post #7 of 9
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Re: 89 3.0 toyota truck idle issues
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Right - that wouldn't be just when hitting brakes - sorry to mislead on that. If pinched that may not have shut it tight enough for that test. Kinda has to be booster related or somehow something goofy with the check valve right at it,
T
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Hammer Time
Ultimate Carjunky
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Aug 17, 2012, 4:43 PM
Post #8 of 9
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Re: 89 3.0 toyota truck idle issues
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Unless the brake lights are shorting something out but I don't see the connection there either.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 17, 2012, 5:06 PM
Post #9 of 9
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Re: 89 3.0 toyota truck idle issues
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It is also possible that there is a vacuum leak somewhere other than the booster and when you step on the brakes that much more vacuum is being used by the booster to induce an idle surge. There are a bunch of vacuum lines on the passenger side of the intake that could easily be mis positioned or not plugged in.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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