IMPORTANT: Be careful and take all necessary safety precautions while working around a running engine. So, the first thing we'll do is to make sure that vacuum is not being applied to the EGR valve when the engine is just idling. The other port connects to the EGR valve and should only have vacuum when the PCM commands the solenoid to activate. One is a vent port (that vents vacuum to the atmosphere) when the engine is idling. The other side of the EGR vacuum solenoid has 2 ports. In case you're wondering, the letter J is embossed above the vacuum port on the throttle body. One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body. The fuel injection computer is the one that regulates the opening and closing of the EGR valve thru' the application and release of vacuum (through a vacuum solenoid). If it doesn't fit, they'll find you the right one. Will the above EGR valve fit your particular GM pickup? Don't worry, once you get to the site they'll make sure it fits (by asking you the specifics of your particular vehicle). The following links will help you comparison shop for the AC Delco and after market EGR valves: If you're wanting the buy the original AC Delco (Delphi) EGR valve, you can buy it online for a whole lot cheaper than somewhere local. You can find the EGR valve in any auto parts store. Won't pass the state mandated emission test.Here's a few more specific symptoms you'll see: So, when the EGR valve gets stuck open, it isn't able to stop the flow of exhaust gas from entering the intake manifold and thus the combustion chamber and your pickup or SUV will idle rough. This re-circulation should happen only after the engine has warmed up and when the engine is under load (like when you're accelerating the vehicle from a stand-still).Īt idle, the EGR valve should NOT be letting any amount of exhaust gas back into the cylinders. This process of letting exhaust gas re-enter the engine's cylinders is known as re-circulation in tech terms. This reduction in oxygen from the air/fuel mixture reduces the amount it creates when it combusts (inside the cylinders) and thus reduces the amount of oxides of nitrogen (NOx) created. TEST 1: Continuous Vacuum to EGR Valve.Īs you're probably already aware, the EGR valve's job is to let a metered amount of exhaust gas (that is oxygen free) into the intake manifold to reduce the amount of oxygen entering the engine.Have been widely recognized as the “Gold Standard” in The Walbro GSS line of high-performance fuel pumps All fuel first passes through fuel injectors and a fuel pressure regulator which only send the required amount of fuel into the intake manifold, sending the unused fuel back to the fuel tank. Installing a Walbro high pressure fuel pump in a non-performance vehicle will not damage your motor. The Walbro 255LPH and 350LPH high pressure fuel pump is highly recommended for vehicles with engine performance purposes. If your vehicle is used for racing purposes, heavy hauling, or in high powered turbo vehicles, OE spec Walbro Fuel pumps may not supply enough fuel to satisfy your engines needs. The GS元92 255LPH and the GS元96 350LPH high pressure pump, however these models are the universal inline fuel pumps, which means it usually mounts outside the fuel tanks. Recently Walbro released a uprated version of these pumps which are the GSS350, GSS351, GSS352 and are rated at 350LPH. HP (High Pressure) - GSS340, GSS341, GSS342 have been the mainstream Walbro 255 LPH high pressure intank fuel pumps for many years. Design based on TI Automotive OEm Chevrolet Corvette The GS元92 255LPH and the GS元96 350LPH high pressure pump, however these models are the universal inline fuel pumps, which means it usually mounts outside the fuel tanks.Capable of handling 500HP+ under standard operating conditions.Wide range of high-efficiency, high-performance.Walbro GSS-Line High-Performance Fuel Pumps: We will reinstate international shipping as these restrictions are lifted.
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The names Walbro® and TI Automotive® as well as related names, marks, emblems and images are registered trademarks of their respective owners.Īll GSL series are in stock with ample quantities.Īll International shipping has been suspended due to Covid-19 with the exception of Canada. is not affiliated, or officially connected with Walbro® or TI Automotive®. The official websites for Walbro® and TI Automotive® can be found at and *Notice of Non-Affiliation and Disclaimer OUT OF STOCK - Available via backorder only or may have shipping delays due to availability.ĥCA, GCA, GCL and TCA (i.e GCA308, 5CA400) As a result, Walbro® /TI Automotive and our suppliers have limited our inventory. Due to COVID-19, the automotive industry as a whole, is experiencing material shortages.