 pressure in gas tank- went to fill up- just put tank back in,, why? |
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| DRPHIL914 |
 Dec 30 2011, 11:01 PM
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Dr. Phil  Group: Members Posts: 5,821 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States 
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I pulled the tank to get at fresh air blower., put it all bak together, so I ran down to the station to fill up. Had about a gallon and a half in the tank. Went to take the gas cap off, and there was a lot of suction on there. I only drove about10 miles to the station. And it's noit hot out. This is a 75 2.0 with d-jet. The only thing I can think of is that when I put the tank back in the vapor line got pinched .. is it possible this caused the negative pressure that fast. ? And if so can I just leave it disconnect the expansion tank until the tank level is low enough to lift ip to move the vapor line. ?
Phil |
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| Racing916 |
Dec 31 2011, 08:47 PM
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Member Group: Members Posts: 341 Joined: 16-October 04 From: Binghamton, NY Member No.: 2,959 Region Association: North East States |
I race my 914 with a 6 cylinder and the return capped off. If it is vented it should not have pressure built up. Make sure your vent line in not plugged.
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| rgalla9146 |
Jan 1 2012, 08:26 AM
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Advanced Member Group: Members Posts: 4,743 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
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QUOTE(Racing916 @ Dec 31 2011, 06:47 PM)  I race my 914 with a 6 cylinder and the return capped off. If it is vented it should not have pressure built up. Make sure your vent line in not plugged. Many years ago I had a factory slant nose Turbo in my shop with an inop. fuel level gauge. You guessed it, blocked vent caused pump ( pumps ! ..Turbo ) to suck that tank down so that it looked like it had been used to wrap your leftover sandwich. |
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| DRPHIL914 |
Jan 1 2012, 10:00 AM
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#4
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Dr. Phil Group: Members Posts: 5,821 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
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QUOTE(rgalla9146 @ Jan 1 2012, 09:26 AM) QUOTE(Racing916 @ Dec 31 2011, 06:47 PM) I race my 914 with a 6 cylinder and the return capped off. If it is vented it should not have pressure built up. Make sure your vent line in not plugged. Many years ago I had a factory slant nose Turbo in my shop with an inop. fuel level gauge. You guessed it, blocked vent caused pump ( pumps ! ..Turbo ) to suck that tank down so that it looked like it had been used to wrap your leftover sandwich. Is it possible that my charcoal filter is clogged or blocked? The plastic line runs from the relief tank back to the charcoal filter. I need a diagram of what and how the hook ups go on the filter too. May be the charcoal filter needs to be replaced? Just another thought |
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Posts in this topic
Philip W. pressure in gas tank- went to fill up- just put tank back in, Dec 30 2011, 11:01 PM
kg6dxn I crushed a tank once (not in a 914). The vent/vap... Dec 31 2011, 01:39 AM 76-914 pull the cover from below (4 bolts) and you might ... Dec 31 2011, 10:28 AM Bob L. Don't mean to hijack, just seems relevant...
... Dec 31 2011, 07:37 PM
Elliot Cannon
Don't mean to hijack, just seems relevant...
... Dec 31 2011, 07:48 PM Bob L.
Don't mean to hijack, just seems relevant...... Dec 31 2011, 08:23 PM BMITCHELL It still should be vented. Vent line on expansion... Dec 31 2011, 07:48 PM kg6dxn Never seen a charcol filter clogged but anything i... Jan 1 2012, 11:59 AM |
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