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The Terminator
Engine/Tuning
Best way to drain 3yr old gas?
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<blockquote data-quote="hmwave" data-source="post: 16389088" data-attributes="member: 10968"><p>Thanks for all the help, much appreciated.</p><p></p><p>I decided to drain and refill fresh before starting.</p><p>Been a while since I tinkered with it so had fun doing so...</p><p></p><p>Steps:</p><p>1. Key off, disconnect fuel line at passenger side fuel rail. Pull metal retaining clip, use fuel line disconnect tool to release connector. Heavy rag underneath to catch slight fuel spillage. Leave clean rag loosely inserted into fuel rail end for now.</p><p>2. Use 5ft 3/8” internal diameter fuel hose pushed over fuel line fitting, tape with electrical tape to ensure it doesn’t come loose (yes, overkill but safety first as fuel is being pumped). Snake fuel hose into gas catch can. Wrap a zip tie firmly around the hose and push that inside can so hose doesn’t jump out.</p><p>3. Driver side of trunk behind trunk liner, pull connector C433 from FPDM. Jumper pins 2 and 3 together to ground pump (with connector pins facing you, flat side down, pins 2 and 3 are bottom right, 2 is second one in, 3 is next pin toward connector center).</p><p>4. Run two conductors from C433 connector to passenger front, tape them safely high on hood prop WELL AWAY from catch can. Insert one into C433 pin 9, other into pin 10 (the two isolated pins at connector top row at the left).</p><p>5. Key on in run position, don’t crank motor. Use a glove to push together the conductors taped to the hood prop which IMMEDIATELY runs the pump at significant volume. Mine filled a 5gal can in 1-2mins. Drain until tank near empty. Be careful not to create sparks when connecting and disconnecting the conductors given there's gas vapor around. I used a nitrile glove to smother the conductors before touching them together and when separating.</p><p>6. Key off. Fill tank with fresh fuel, I used 10gals with some Seafoam mixed in.</p><p>7. Repeat step 5 running pump for a min or two to get the fresh gas through the fuel lines. Probably takes less time to fully flush but I wanted to be sure.</p><p>8. Key off, disconnect drain hose, move gas can to safe place, and refit fuel line to rail, secure with metal clip in proper position. Rub some clean engine oil on the o-rings before pushing home.</p><p>9. Probably not strictly needed but I also used a rag on the passenger side Schrader valve to flush that rail. Same technique, key on, safely connect the conductors to run pump. BE VERY CAREFUL HERE as this quickly creates fuel vapor and the fuel soaked rag so NO SPARKS. Move the rag to a safe place outside.</p><p>10. Again, maybe overkill, but I pulled the fuel rail pressure sensor on the driver side and repeated step 9 to flush that side. Just takes 5mins. However this time I used the fuel hose to drain into the catch can using a 3/8” inline plastic connector in the fuel hose and held firmly into the fuel rail port as the pump pressure will launch gas out of there. Be very careful. 'Measure twice, drain once'.</p><p>11. Key off, move gas can to safe place, refit pressure sensor, a little clean engine oil on o-rings.</p><p>12. Pull the jumper and conductors from C433, reconnect it to the FPDM.</p><p>12. Clean up, recheck all connections. Key on, fire her up and head out to burn through that Seafoam!!</p><p></p><p>You'll probably need to clear codes as the ECU typically posts an FPDM related code given you'd disconnected it.</p><p></p><p>I also plan to fit a new fuel filter.</p><p></p><p>Over subsequent fills, pour a gallon of the stale gas into near full tank each time, or dump it in your clunker, burn it up.</p><p></p><p>And, don’t let the car sit for three years again unused!</p></blockquote><p></p>
[QUOTE="hmwave, post: 16389088, member: 10968"] Thanks for all the help, much appreciated. I decided to drain and refill fresh before starting. Been a while since I tinkered with it so had fun doing so... Steps: 1. Key off, disconnect fuel line at passenger side fuel rail. Pull metal retaining clip, use fuel line disconnect tool to release connector. Heavy rag underneath to catch slight fuel spillage. Leave clean rag loosely inserted into fuel rail end for now. 2. Use 5ft 3/8” internal diameter fuel hose pushed over fuel line fitting, tape with electrical tape to ensure it doesn’t come loose (yes, overkill but safety first as fuel is being pumped). Snake fuel hose into gas catch can. Wrap a zip tie firmly around the hose and push that inside can so hose doesn’t jump out. 3. Driver side of trunk behind trunk liner, pull connector C433 from FPDM. Jumper pins 2 and 3 together to ground pump (with connector pins facing you, flat side down, pins 2 and 3 are bottom right, 2 is second one in, 3 is next pin toward connector center). 4. Run two conductors from C433 connector to passenger front, tape them safely high on hood prop WELL AWAY from catch can. Insert one into C433 pin 9, other into pin 10 (the two isolated pins at connector top row at the left). 5. Key on in run position, don’t crank motor. Use a glove to push together the conductors taped to the hood prop which IMMEDIATELY runs the pump at significant volume. Mine filled a 5gal can in 1-2mins. Drain until tank near empty. Be careful not to create sparks when connecting and disconnecting the conductors given there's gas vapor around. I used a nitrile glove to smother the conductors before touching them together and when separating. 6. Key off. Fill tank with fresh fuel, I used 10gals with some Seafoam mixed in. 7. Repeat step 5 running pump for a min or two to get the fresh gas through the fuel lines. Probably takes less time to fully flush but I wanted to be sure. 8. Key off, disconnect drain hose, move gas can to safe place, and refit fuel line to rail, secure with metal clip in proper position. Rub some clean engine oil on the o-rings before pushing home. 9. Probably not strictly needed but I also used a rag on the passenger side Schrader valve to flush that rail. Same technique, key on, safely connect the conductors to run pump. BE VERY CAREFUL HERE as this quickly creates fuel vapor and the fuel soaked rag so NO SPARKS. Move the rag to a safe place outside. 10. Again, maybe overkill, but I pulled the fuel rail pressure sensor on the driver side and repeated step 9 to flush that side. Just takes 5mins. However this time I used the fuel hose to drain into the catch can using a 3/8” inline plastic connector in the fuel hose and held firmly into the fuel rail port as the pump pressure will launch gas out of there. Be very careful. 'Measure twice, drain once'. 11. Key off, move gas can to safe place, refit pressure sensor, a little clean engine oil on o-rings. 12. Pull the jumper and conductors from C433, reconnect it to the FPDM. 12. Clean up, recheck all connections. Key on, fire her up and head out to burn through that Seafoam!! You'll probably need to clear codes as the ECU typically posts an FPDM related code given you'd disconnected it. I also plan to fit a new fuel filter. Over subsequent fills, pour a gallon of the stale gas into near full tank each time, or dump it in your clunker, burn it up. And, don’t let the car sit for three years again unused! [/QUOTE]
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Best way to drain 3yr old gas?
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