Question about Cars & Trucks
Fuel from the pressure regulator can't enter the intake manifold with out passing through the injector first. That means that if you have a leak in the inlet manifold you have a leaking injector.
A fuel pressure regulator is no more than a controlled leak. You test pressure on the fuel rail, if you have pressure you have fuel to the injectors.
The regulator controls that pressure by controlling the return flow to the fuel tank. You are in trouble when a pressure regulator does not flow (leak) fuel from the pressure (fuel rail) and return ports.
To test weather a injector is leaking you remove it from the inlet manifold and pressurize the injector.
Posted on May 02, 2015
You don't of course
Posted on May 01, 2015
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Posted on Jan 02, 2017
SOURCE: leaking fuel pressure regulator
Release fuel pressure by removing fuel pump relay and turning engine over to release pressure. Place a rag to catch any fuel under regulator Fuel pressure regulator has a locking clip pry clip off remove vacuum line pull regulator out with twisting motion,replace fuel pressure regulator install clip connect vacuum line install relay. Check for leaks,your done.
Posted on Feb 23, 2010
Sounds like you need a intake manifold gasket replaced it will cost you a couple hundred to have someone do it for you but if you have mechanical ability you can do it yourself if the coolant is in the oil you will want to get it done very soon because the coolant will wash the bearings in the lower end then costing you alot more. any other questions just ask.
Posted on Aug 13, 2008
SOURCE: coolant leak
You may want to check it with an ultraviolet dye and light kit.You can get a kit from a good auto parts store and do it yourself. They have dyes for every kind of fluid a car has. A very handy tool and not very expensive either.
Posted on Nov 26, 2008
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Dec 29, 2016 | Chevrolet Tahoe Cars & Trucks
Fuel Trim System Lean (Bank 1)
Air leaks in intake manifold, exhaust pipes or exhaust manifold.Fuel control sensor is out of calibration (ECT, IAT or MAF.)Low fuel pressure (fuel filter clogged, pressure regulator failure).One or more injectors restricted or pressure regulator has failed.HO2S element is contaminated, deteriorated or has failed.Vacuum hose is disconnected, broken, leaking or loose.Trouble Code: P0174
Fuel Trim System Lean (Bank 2)
Air leaks in intake manifold, exhaust pipes or exhaust manifold.Fuel control sensor is out of calibration (ECT, IAT or MAF).Low fuel pressure (fuel filter clogged, pressure regulator failure).One or more injectors restricted or pressure regulator has failed.HO2S element is contaminated, deteriorated or has failed.Vacuum hose is disconnected, broken, leaking or loose.
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