See full version: Mercruiser 5. 7 electronic fuel pump not getting power
After trouble shooting fuses (all I can find under dash are good) took out fuel pump and connected directly to a battery it pumps. But connected to engine wiring harness does not run. I canot find any fuses or relays in the engine compartment to check.
Re: Mercruiser 5.7 electronic fuel pump not getting power [links]
Own a 1998 Baja with 5.7 L carburated Mercruiser. Put the boat away after july 4th weekend and was running fine. Got back to the lake this weekend and won't start. Pumping throttle used to work for starting after long periods of no use, but did not smell any gas at all, so put a thimble full of gas in carb and it fired right up then died. Engine still would not even attempt to start without putting gas directly in carb.
Re: 4.3 L Mercruiser not getting fuel here
Re: 4.3 L Mercruiser not getting fuel more
Re: 4.3 L Mercruiser not getting fuel
Re: 4.3 L Mercruiser not getting fuel
Does it have a carb? If so you could try disconnecting (carefully) the fuel line at the carb inlet. Behind the big carb nut at the fuel line entry point there is usually another filter. Check or replace it.
While the fuel line is disconnected from the carb put it into a jar and turn the key on briefly to see if you are pumping fuel to the carb. Be extremely careful when doing this.
The OEM filter should be this.http://www.iboats.com/Water-Separat. 91805119--**********.301776756--view_id.45101 [links]
If you’ve experienced any of the symptoms of a failing fuel pump, it’s best to schedule a service visit using the links below. Some of the symptoms of a bad pump can also be caused by other mechanical problems, so our trained technicians will perform a number of tests to isolate the true cause of the problem. If no other sources seem likely, they’ll confirm the fuel pump diagnosis with a number of procedures.
Your car’s engine needs a regular stream of fuel to keep it humming along. The fuel pump is a device that moves fuel from your tank to the engine, supplying the fuel at a constant pressure to ensure that your engine runs smoothly.
Although mechanical and electronic pumps fail for different reasons, the symptoms of failure are similar for both types of pumps. If you notice any of the common symptoms of fuel pump failure while you’re driving, you may need to have your fuel pump inspected and replaced. more
If you notice that your car often loses power when you try to accelerate from a stop, your fuel pump may be in trouble. Accelerating requires more fuel, forcing your fuel pump to work harder. If your pump is failing, it may not be able to keep up with this increased demand, starving your engine of fuel as it tries to accelerate. If your car acts like it’s about to stall when you try to accelerate from a stop, you may need to have your pump inspected. here
Your fuel pump is an integral part of your car, supplying your engine with a steady supply of the fuel it needs to keep you moving. Like any device, however, fuel pumps can and do eventually wear out after thousands of miles of use. If your car struggles with weak or inconsistent power, it may be time to replace the fuel pump on your car.
Since mechanical pumps are driven directly by the motion of the engine and contain few moving parts, they tend to be reliable and relatively easy to diagnose and fix. Most problems with mechanical pumps occur when the diaphragm is damaged in some way, throwing the pressure system off balance. Electronic pumps are typically linked to electronic control systems and contain multiple moving parts; because of this increased complexity, these types of pumps are more prone to failure. Any one of several different parts can malfunction and lead to fuel pump problems. more
The Anti-Theft System Is Disabling The Fuel Pump [links]
Without proper test equipment you won’t be able to test the relay; but many of the relays in the box are the same AMP rating and size. If you switch the relay with a different one of the same size and rating; ( same amount of prongs on the bottom ); than you can try to start the car or listen for the fuel pump to run with the key on. more
When your engine cranks but, no start. It usually means your engine is having trouble producing a spark, getting fuel, or creating compression. But, what if, ignition, fuel, and compression were all checked and are […]
The problem could be: [links]
Electric fuel pumps on electronically controlled fuel injection systems need to; produce enough “high” pressure to allow the injectors to produce a sufficient spray of atomized fuel; into the intake path (or into the combustion chamber in a direct-injection system). Fuel pressure is typically in the 35 to 45 psi range. [links]