Q: How to replace the fuel pressure regulator on Cadillac CTS?
A: The procedure for removing fuel system pressure must be completed before starting the Fuel Pressure Regulator replacement task. Before working on the Fuel Pressure Regulator you must remove the air inlet grill then set a shop towel beneath to catch potential fuel leaks. The first step involves detaching the atmospheric vent hose from the Fuel Pressure Regulator then removing its clamp bolt. Twist the regulator while pulling outward to separate from the rail after spreading the clamp somewhat to remove the Fuel Pressure Regulator. To install the Fuel Pressure Regulator you must place clean engine oil on its o-ring seals followed by proper orientation of the atmospheric vent toward the engine front. To install this component properly you should push the Fuel Pressure Regulator toward the Fuel Rail while you turn it to obtain complete contact that allows you to position the clamp at both the Fuel Pressure Regulator and the Fuel Rail. Next install the Fuel Pressure Regulator clamp bolt while tightening it to 5 n.m (44 lb in). The atmospheric vent hose should be reattached to the Fuel Pressure Regulator port before starting the Fuel Pump with a scan tool while performing leak checks. The air inlet grill can then be put back into position.
Q: How to service the fuel pressure regulator on Cadillac Eldorado?
A: One must begin Fuel Pressure Regulator service by first reducing fuel pressure and inspecting whether solid matter exists on the Fuel Pressure Regulator. The first step involves releasing fuel pressure along with cleaning of the Fuel Pressure Regulator. After that disconnect the vacuum line connected to the Fuel Pressure Regulator. The removal of the clip holding the regulator in place should occur next. The lift-twist motion of the Fuel Pressure Regulator against the Fuel Rail frees the Fuel Pressure Regulator while fuel spills are contained with a shop towel. Service the Fuel Pressure Regulator by eliminating the regulator seal lower o-ring as well as the regulator assembly filter and the regulator seal upper o-ring and regulator seal back up ring. The housing of the Fuel Pressure Regulator needs protection from contaminants that could enter the fuel system during this procedure. Before installing the Fuel Pressure Regulator you should place new o-rings on its unit and lightly oil them using clean engine oil. The Fuel Pressure Regulator needs installation with the back up ring first followed by the upper o-ring and filter and lower o-ring before fastening it with the retainer clip and vacuum line reconnection. Turn the ignition on for two seconds before turning it off for ten seconds to check for fuel leaks when inspecting the connection between the negative Battery Cable. Connect the sight shield for fuel injectors as the last step.
Q: How to service and repair the fuel pressure regulator on Cadillac DeVille?
A: The service process for the Fuel Pressure Regulator requires relieving fuel pressure through quick connect fitting(s) service (Metal Collar). Every speck of dirt should be cleaned off the Fuel Pressure Regulator before removing the vacuum line. The Fuel Pressure Regulator can be detached from the Fuel Rail through a retainer clip removal process that involves lifting it while rotating with a shop towel covering any spilled fuel. Service begins with removing successively the lower o-ring and regulator assembly filter and upper o-ring before taking out the back up ring. A protective covering should be positioned at the Fuel Pressure Regulator housing to stop fuel system contamination. The process of installation requires new o-rings when using an existing regulator where gentle application of clean engine oil serves for lubrication. Install the filter along with the lower o-ring and back up ring and upper o-ring starting from the bottom before securing them with the retainer clip. The vacuum line should reconnect along with the negative Battery Cable. Perform a fuel leak check by turning on the ignition while the engine remains off for 2 seconds followed by shutting off the ignition for 10 seconds leading to a second on ignition without starting the engine for leak inspection. Place the fuel injector sight shield as the last step.