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12-20-2004, 02:24 AM
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#1 |
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Registered User
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,339
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Idle Problem
When the truck is at idle and I press the brakes after about 2-3 seconds the idle drops from 750 to 500 and the truck seems like its fighting to stay running. I let off of the brake and the truck idles back up but there is a smell that comes along with it? I have a 350 with a new power booster, mc and check valve. I recently painted the booster and mc. Any ideas on whats going on?
Thanks
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RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 |
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12-20-2004, 02:26 AM
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#2 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Booster has vacuum leak.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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12-20-2004, 02:28 AM
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#3 | |
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Registered User
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,339
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Quote:
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RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 |
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12-20-2004, 12:15 PM
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#4 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Worth a try.
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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12-20-2004, 01:36 PM
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#5 |
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Registered User
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,339
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I will try that tonight.
Thanks
__________________
RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 |
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12-20-2004, 02:48 PM
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#6 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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If that does not work try removing the the line to booster and plugging. then try brakes -if it does not change idle has to be in booster.
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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12-21-2004, 01:57 AM
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#7 |
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Registered User
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,339
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I think I got it. I replaced the rubber seal and check valve. That helped somewhat but what fixed it completely was me adjusting my carb. I think I had it a little too lean. A quarter turn on each side of the holley did the trick. Also the original rubber check valve seal was very flimsy. The replacement was not.
Thanks
__________________
RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 |
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