The fuel pump is diffrent from my inline it has two lines commin of it. one is the feed line and the other must go back to the fuel tank as a run off? can i just plug the line? can i use the one of the inline?
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Re: fuel pump two lines
I had a 85' Just like yours. You cannot Plug the Return line or it will Overfill the Bowl and result in Overignition and Flooding out. That return line catches all of the Fuel that the TBI Does not Burn and Returns it to the Fuel tank for Reuse. Please Rate My Response! Thanks!
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hi, i;ve never worked on one of these, but, it must have an electrical fuel pump. the easiest way to check this is to jack the car up and look up under the rear and near the fuel tank. these pumps are INLINE meaning FUEL PIPE IN THE CENTRE (IN) arrowed toward the engine and FUEL PIPE IN THE CENTRE (OUT). these have 2 conectins IGNITION FEED and GROUND. if you switch on ignition and NO FUEL. then NO IGNITION FEED / RELAY / BAD CONNECTION / NO EARTH / COMPLETE DISCONECTION / FUEL PUMP BLOCKED / FUEL PUMP (INTERNALALLY OPEN CIRCUIT pump needs replacing). i hope this has helped. gerry
Could be clogged fuel line ,but the V8 engine fuel pump is operated by a offset lobe on the cam shaft,
take the fuel line loose at the pump and crank the engine,also line from tank to pump could clogged, if you have a air compressor,take the fuel cap off and back blow the line,
let me know if this helps.
they should be diffrent sizes, the bigger one goes to line that also goes to fuel filter which is the feed line (preasure line ) the smaller is the return, which is a metal line all the way to engine, if they are exactly the same size then unhook both have someone quickly turn key on while you watch the line that sparys fuel, that will be the line that the fuel filter is on that the way to check it, good luck.
CRACK LOOSE THE INJECTION LINES 2 OR 3 OF THEM WILL BEEN ENOUGH. TURN THE ENGINE OVER TILL FUEL STARTS PUMPING A LITTLE BIT. THEN TIGHTEN THE LINES. IF ENGINE STARTS WEHN BLEDING THE LINES SHUT IT OFF. AFTER LINES ARE TIGHT START YOUR ENGINE THE REST OF THE LINES WILL BLEAD AFTER A SHORT RUN TIME.
Older chev mechanical pumps had a single feed line. Newer ones had a feed line and a return. The steel lines on the sending unit are feed and return. If there was a vent line it would be a seperate line going to the top of the tank all by itself. If everything is hooked up correctly you should have about 7lbs pressure at the feed line.The needle valve in the carb will not allow leak-back if it is working correctly. If you have a Qjet carb, the bottom bowl plugs sometimes leak... that is a different problem not caused by supply.
The fuel filter is located on the fuel feed pipe, between the fuel pump and the fuel injectors. It will be a Metallic tube like item about 4 inches long inline with your fuel supply (feed) line. If you can lift vehicle or get underneath it, then find your gas tank, find the line coming from top of your gas tank and trace it out. Filter is uaully within a few feet of the gas tank.