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Old 01-24-2007, 07:25 AM   #1
Lizzy_in_a_Jeep's Avatar
Join Date: Aug 2006
Posts: 48
Gas over flow tube?

Ok on my Jeep Wrangler I have this tube coming out the top of the tank, I obviously think its the over flow. Why though? Everytime I fill the tank up it goes EVERYWHERE. Can I remove it? DO I need it? I don't think I need it, because my last wrangler didn't have one.

Also this might tie into it but, Most of the time when I start it I always have a hard time getting it started. Usually take two or three tries before it cranks over. Could this be due to lack of back pressure because of the open gas tank? Maybe because the tank is always open that the gas doesn't stay in the lines, it always draws back? Because it seems as though if I turn the key to the on position for a few seconds it has no probs starting up.

Or is it my spark plugs?

Or maybe my fuel pump?

Or maybe someone could inform me of other options?

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Old 01-24-2007, 07:37 AM   #2

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Join Date: Apr 2005
Location: Florence, KY
Posts: 11,099
Sounds to me like you have leak. Mine did that, and one of the o-rings or something needed replaced. Below is from the FSM

The fuel tank is constructed of a plastic material.
Its main functions are for fuel storage and for placement
of the fuel pump module.
All models pass a full 360 degree rollover test
without fuel leakage. To accomplish this, fuel and
vapor flow controls are required for all fuel tank connections.
A rollover valve(s) is mounted into the top of the
fuel tank (or pump module). Refer to Emission Control
System for rollover valve information.
An evaporation control system is connected to the
rollover valve(s) to reduce emissions of fuel vapors
into the atmosphere. When fuel evaporates from the
fuel tank, vapors pass through vent hoses or tubes to
a charcoal canister where they are temporarily held.
When the engine is running, the vapors are drawn
into the intake manifold. Certain models are also
equipped with a self-diagnosing system using a Leak
Detection Pump (LDP). Refer to Emission Control
System for additional information.
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