Question about Cars & Trucks
The one in the tank is the so called low pressure pickup pump, the one on the rail is the high pressure pump.
Posted on Apr 30, 2013
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Posted on Jan 02, 2017
First off, what kind of vehicle do you have? I assume it is one that has an electric fuel pump in the gas tank, so that is what my answer will be geared to.
On the gas tank there are several lines. The most important ones for this conversation are the ones that deliver fuel to the engine and the one that returns the excess fuel back to the tank. They are usually different in size.
The larger one delivers the fuel and the smaller one returns the excess fuel back to the tank. Either one may be the culprit in this scenero.The tank is usually connected by a high pressure flexible fuel line to a stainless fuel line resembeling a brake line. At times this flex line may develope a leak for varrious reasons. It could be something rubbing against the line, it could be the crimped connection went bad and is leaking, etc. If it is your flex line, which it probably is there is a repair kit you can purchase to fix it. I have only been able to find this repair kit at NAPA. I've tried many auto parts stores and they are the only ones that carry it. The use of it is very simple actually. You find the leak in your line, which by the way is harder than it sounds and usually involves removing the gas tank. In which case you will need a special tool to disasemble the gas line from the tank. Once the leak is located you cut the line. You then have to place the remaining flex hose in boiling hot water for at least 10 seconds, which makes it soft and insert a splice fiting into it. When the line cools, it will shrink tight on the connector. You the do the same with the hose that came with the repair kit. Then do the same with the other end and install the fitting which connects to the gas tank. You should now be in business.
BTW. I have to do this very thing tomorrow.
Good Luck! and let me know if this helps you.
Posted on Mar 07, 2009
You are looking for the constant control relay module- ( CCRM ) see below. The pump will be located inside the fuel tank.Most of the time , its the pump and not the relay but, it wouldn't hurt to check the relay out. Teh relay is housed in the CCRM. Its located behind the engine coolant reservoir.
Posted on Mar 20, 2009
the problem is the fuel pump inside the front tank is defective, it is not a fuel filter, the fuel from both tanks fuel pumps runs through the same filter
Posted on Feb 18, 2010
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SOURCE: Two fuel pumps???
The 88 Cabrio has 2 fuel pumps and 2 fuel filters as well. One filter next to the main fuel pump and another under the hood next to the air filter. The transfer pump in the tank is easily acsessed under the back seat by an access panel with 3 screws. The Transfer pump has a screen which is notoriously clogged. The Main pump is on the frame on the passenger side mounted in a rubber casing. Both pumps can be tested by wiring the terminals straight to a battery. Check your relay and fuse first. The fuse is the 5th from the left and the relay is the 2nd from the left in the first row.
Posted on Jan 06, 2011
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