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Search Auto Parts Search 99 GMC Sonoma 2.2L GAS LEAK following fuel pump change Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Car Troubleshooting LudlowLou User Oct 4, 2013, 7:01 AM Post #1 of 3 (1453 views) 99 GMC Sonoma 2.2L GAS LEAK following fuel pump change Sign In Just changed fuel pump and fuel tank. I believe that I crossed two of the three fuel lines connected to the fuel pump. One is 3/8" , the other two are 5/16" which are the one I suspect are crossed. I put some gas in and the truck started and ran fine, no leaks. I put the balance of the gas in (7 gallons, est.) and took it for a ride. About a mile out it started bucking and hesitating. When I pulled over, I found gas leaking from the EVAP outlet behind the tank. When truck is off, no leak. Can anyone confirm my hunch? Thank you in advance. LOU Hammer Time Ultimate Carjunky / Moderator Oct 4, 2013, 7:03 AM Post #2 of 3 (1449 views) Re: 99 GMC Sonoma 2.2L GAS LEAK following fuel pump change Sign In Yep, it sounds like you did and probably destroyed most of the EVAP system in the process. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. Discretesignals Ultimate Carjunky / Moderator Oct 4, 2013, 8:10 AM Post #3 of 3 (1433 views) Re: 99 GMC Sonoma 2.2L GAS LEAK following fuel pump change Sign In Didn't think this was possible, but I guess it you have a big enough hammer you can make it work. From what I remember it is difficult to switch the vapor and pump return lines at the sender. The vapor line connects to the middle nipple that has a tab, so you can't plug the return onto it. Wonder what the return fuel did to the vapor separator valve on the top of the sender? Probably laying in the bottom of the gas tank....LOL Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.   Email This Post   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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