#Can you drive with a bad fuel pump module install#
Install the check valve with the arrow pointing towards the engine. If you have nylon lines use the nylon compression fittings. If you have steel fuel lines, use the metal compression fittings. Wear protective gloves and eye protection and be prepared to catch any remaining fuel in the lines. Then cut the fuel line as close the tank as possible. To install, simple depressurize the fuel system by removing the fuel pump fuse and starting and running the engine until it stalls. The check valves should not be installed on return-less fuel systems. You can spot those systems because they have a pressure line running up to the fuel rail and a return line after the fuel pressure regulator. check valves work on RETURN style fuel systems. The check valves come in two sizes CKV5 for 5/16” lines and CKV7 for 3/8” lines. The add-on CKV5 & CKV7 check valves install right into the high pressure fuel line OUTSIDE THE TANK and prevent gas and pressure from bleeding off. came up with a more cost effective solution that’s MUCH easier. Depending on whether you buy an OEM or aftermarket fuel pump module, you can expect to pay anywhere from $300 to $800 to replace the entire fuel pump module to correct a stupid little check valve.
That’s a LOT of work just to replace a very small check valve.Įven if your car has the access cover, fuel pump replacement isn’t cheap. Other car makers make it much harder, requiring you to disconnect the fuel tank filler hose and all the emissions devices and then lower the tank to access the fuel pump. Remove the cover, disconnect the power and fuel lines, remove the retaining ring and lift out the old pump. Some car makers make that easy by incorporating a removable access cover in the back seat. The check valve is not available from the dealer as a separate item so most shops replace the entire fuel pump. What’s the fix for a bad fuel pump check valve It also retains most of the fuel pressure that was built up by the pump so you’ll instantly have both fuel and pressure when you try to start the engine. The check valve prevents fuel from draining back into the tank once you shut off the engine. Turbine style fuel pump showing the turbine, motor and check valve What the check valve does You know it’s lack of fuel because the engine starts if you spray or pour fuel into the intake or your fuel pressure gauge shows too low a fuel pressure or even no fuel pressure. What we’re talking about here is an engine that must crank for 2-8 seconds before it actually fires up after sitting overnight or for several hours.
Engine cranks a long time before it fires up is sign of a bad check valve in the fuel pump I’ll go through the most common symptoms of a bad fuel pump for fuel injected vehicles. However, newer cars with fuel injection have electric fuel pumps located in the fuel tank and they have different failure symptoms than a mechanical fuel pump. Older cars equipped with carburetors usually have mechanical fuel pumps driven by the camshaft and a follower pin. Symptoms are different between electric and mechanical fuel pumps The point is, perfectly good fuel pumps get replaced because people don’t always know the symptoms of a failing fuel pump or do the proper testing before replacing the pump. If your engine won’t start, takes too much cranking to start or your engine stalls, you may have a bad fuel pump or you may have a fuel pump wiring issue caused by a corroded connection or ground or a bad fuel pump control module. Repair Topics > Fuel, Fuel pump, Fuel delivery > Symptoms of a bad fuel pump Symptoms of a bad fuel pump What are the symptoms of a bad fuel pump