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2000 trailblazer 4.3 fuel pump issue Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Truck Repair>> Truck Engine Repair Jack Mack New User Oct 6, 2016, 8:57 AM Post #1 of 3 (2245 views) 2000 trailblazer 4.3 fuel pump issue Sign In  The truck won't start. It's got fire and gas, but the fuel pump cycles when you turn the key on and when you turn the key off. It has 55 pounds of pressure but drops when you turn the key off immediately. kev2 Veteran Oct 6, 2016, 9:07 AM Post #2 of 3 (2243 views) Re: 2000 trailblazer 4.3 fuel pump issue Sign In 55 psi sounds LOW - will need to check the specs. The pressure drop is also problematic.... out of a abundance of caution check eng oil for evidence of fuel. Might be able to check spark plugs for a problem ie plug BLACK or WET to pinpoint fuel dropping BUT you will need to check spider assy for leaking and that will require upper manifold removal. Hammer Time Ultimate Carjunky / Moderator Oct 6, 2016, 12:23 PM Post #3 of 3 (2234 views) Re: 2000 trailblazer 4.3 fuel pump issue Sign In Check the plugs on the driver's side. That is where the fuel will go if it is leaking. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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