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Gas in intake manifold

 
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  #1 (permalink)  
Old 02 Feb 2008, 04:27 pm
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Join Date: Feb 2008
Posts: 3
Default Gas in intake manifold

so i pulled off my intake manifold today and the inside of it is gas soaked.. bad.. any body have an idea what this is from?
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Old 03 Feb 2008, 04:23 am
Cool Cruiser
 
Join Date: Dec 2007
Posts: 369
Default Re: Gas in intake manifold

are you sure it was gas? its more likely that it was oil from the PCV system hose that connects to the upper runners.
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06 Touring Edition NA/Auto. Airaid intake, Magnaflow Stainless cat-back exhaust, Taylor Thundervolt plug wires, rear lowered 1.75" with H&R Springs.
Yep, buying parts I cant afford with money I dont have to impress people I dont like anyways.
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Old 03 Feb 2008, 11:27 am
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Default Re: Gas in intake manifold

no its definately gas... oil id understand, lol when i took the top piece of the manifold off there was gas in it, on the gasket that connect the two pieces and in the lower piece, i wiped it to make sure.. cause it smelled strong of gas
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Old 03 Feb 2008, 01:27 pm
Cool Cruiser
 
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Posts: 369
Default Re: Gas in intake manifold

pull off the EGR hose (or unbolt rather) and see if you have gas in there. that would be the only other way fuel would get that far up the intake tract. other crazy off the wall idea might be a dirty fuel injector spraying at a funky angle.
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06 Touring Edition NA/Auto. Airaid intake, Magnaflow Stainless cat-back exhaust, Taylor Thundervolt plug wires, rear lowered 1.75" with H&R Springs.
Yep, buying parts I cant afford with money I dont have to impress people I dont like anyways.
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Old 08 Feb 2008, 01:41 am
2sb 2sb is offline
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Location: dallas, texas, USA.
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Default Re: Gas in intake manifold

Gas should evaporate off quickly once the intake was opened. Possibly a gas/oil mixture. It doesn't take much gas to impart it's smell. Is it in all the runners or just one? Just one may mean a leaking intake valve/injector. If it's in all, it's coming from the PCV and... there's probably gas in your oil. Take a good whiff of your dipstick. Good Luck!
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Last edited by 2sb; 08 Feb 2008 at 01:45 am.
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Old 11 Feb 2008, 08:21 pm
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Join Date: Dec 2003
Location: San Antonio, Texas
Posts: 535
Default Re: Gas in intake manifold

The gas smell is normal. It comes from the vapors in the engine when fuel burns. If you look in there you will see an oil film. That's normal and that's where the smell is coming from.
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Old 15 Mar 2008, 11:06 am
Young Cruiser
 
Join Date: Jan 2008
Location: great white north minnesota
Posts: 52
Default Re: Gas in intake manifold

Hey I changed plugs last night complete job in around 45 minutes.
When I took plentum off I also found soaked intake with gas not oil my cruiser is terrible on gas I think the 2 are related This shouldn't be there since the injectors are direct into the head I am wondering if I have a restricted converter or intake.

I found a mouse nest in the brother in laws snorkle pre filter on his car (non pt) but I didn't have time to look last night on mine I will have to look closer today and haynes has a method for checking for a restricted converter I will try that too.
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Old 15 Mar 2008, 09:25 pm
Fresh Cruiser
 
Join Date: Feb 2008
Posts: 3
Default Re: Gas in intake manifold

well thats sucks but glad to know its not just me.. everybody talks to me like i dont know the difference between gas and oil in the intake.. lol and when i say soaked.. i didnt mean alil wetness or smell.. its soaked.. if you figure out something let me know
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Old 15 Mar 2008, 10:21 pm
Cool Cruiser
 
Join Date: Dec 2007
Posts: 369
Default Re: Gas in intake manifold

You guys can always install a 'catch can' on the pcv hose to eliminate or at least severly reduce that oil in the intake tract. that just might be my next mod after seeing all the oil in my intake while changing my plugs.
__________________
06 Touring Edition NA/Auto. Airaid intake, Magnaflow Stainless cat-back exhaust, Taylor Thundervolt plug wires, rear lowered 1.75" with H&R Springs.
Yep, buying parts I cant afford with money I dont have to impress people I dont like anyways.
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  #10 (permalink)  
Old 16 Mar 2008, 08:32 pm
Young Cruiser
 
Join Date: Jan 2008
Location: great white north minnesota
Posts: 52
Default Re: Gas in intake manifold

this is not oil. I have been wrenching on cars for 20 years+ I know the difference it is gas. my car takes absolutly no oil I just changed at 5000 and not a drop of consumption. I use good oil castrol gtx. but I am sure it is gas in the plentium... acording to haynes trouble shooting this can be caused by a faulty upstream o2 sensor and unburned fuel being returned through the egr valve hense the 19 miles to the gallon, i am going to try a new bosch o2 sensor since I have 90,000 on the car and it is about time for one anyway. I will let you know the results.
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