Gas in throttle body hose - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-19-2006, 12:08 AM   #11
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wouldn't that be hot
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Old 05-19-2006, 12:15 AM   #12
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and if theres no gas in there then what should i do
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Old 05-19-2006, 01:40 AM   #13
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It'* not hot, and check it before asking what might NOT be wrong with it.
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Old 05-19-2006, 08:24 AM   #14
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A leaking and bad FPR can leak fuel into the vacuum hose and into the throttle body. No matter how much or little fuel it leaks, that indicatea a bad FPR and this could cause all kinds of issues with the car.

Please perform the tests as mentioned above and report back. We are here to help you out.
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Old 05-20-2006, 10:47 PM   #15
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ok i checked it and i didn't see any signs of gas in the vac hose.
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Old 05-22-2006, 09:05 AM   #16
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Your first post mentioned gas in the hose between your filter and throttle body. Being that there is no filter on a vacuum hose going to the throttle body we assumed you meant the fuel pressure regulator as it might be confused as a filter to some.

Do you mean the hose that goes from the drivers front fender area aka (charcoal canister) to the throttle body?

If so you need to replace your charcoal canister right away and look at your fuel filling practices. Topping off and filling to the level of the gas cap are usually the practices that cause this problem.
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Old 05-22-2006, 10:47 AM   #17
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Bill, I think he'* talking about the airbox, not the charcoal (evap) canister.

The only possible source is a faulty FPR backfeeding into the vacuum line. Then when he shuts down, it drips out the TB and into the accordian tube.
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