What causes high pressure fuel pump failure?
Fuel contamination: Fuel is jeopardized from corrosion, debris and moisture, which can all bring visible contaminants into the tank. Clogged strainers/filters: The aforementioned contaminants eventually clog critical components including strainers, filters and the fuel pump itself.
What can too much fuel pressure cause?
High fuel pressure results in a rich air-fuel ratio because the increase in pressure forces more fuel through the injectors than required producing increased emissions (HC’s) and black sooty exhaust. These excessive hydrocarbons overheat and damage the catalytic converter.
What should the fuel pressure be in a Toyota truck?
If it reads between 40.8 and 41.7 psi, then your fuel pressure is correct. If it doesn’t, then the fuel pressure regulator or fuel pump may be defective, and you need to do further testing to find out.
Can a bad fuel pressure regulator cause flooding?
Unless it is leaking. then it can cause flooding. But usually if that is the case, setting overnight it would usually start OK, because the fuel would have mostly evaporated and dissipated by then. You may also have a weak fuel pump so then a bad fuel pressure regulator would be that much worse. IF everything is OK now then let it be.
Do you need to do a fuel pressure test?
This test is only necessary if other pressure tests indicate lower than normal fuel pressure. CAUTION: Perform this test only long enough to determine if pressure rises above minimum specification; risk exists of blowing coupler hose off of pump. This test is only necessary if other pressure tests indicate lower than normal fuel pressure.
How does the cold start injector work on a Toyota?
The cold start injector most certainly works at temperatures above 32deg. The cold start injector time switch provides a ground circuit for the injector that allows the injector to spray fuel during cranking to help start the engine. The time it allows the fuel to spray is based on what the temperature is.