what are all 4 of the lines coming off the fuel pump?
02-22-2012, 07:29 PM
#3
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It is probably another evap line that is connecting the roll over valves mounted elsewhere on the tank into the main evap line that goes to the evap canister.
On some RV's and big trucks there will be another 'auxiliary' feed line to send fuel to some other external device that uses fuel
On some RV's and big trucks there will be another 'auxiliary' feed line to send fuel to some other external device that uses fuel
02-22-2012, 07:46 PM
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From what I found I think its a vent line that goes to the charcoal canister. I was planning to delete the evap selonoid. Looks like most people just cut it near the tank and put a small filter on it but couldn't I just put a T in the line going to the charcoal canister and hook the evap line unto the T. I don't want to have the gas smell. With out cats I get enough from the exhaust.
02-23-2012, 12:08 PM
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Not sure if I am following you exactly. In general, you have a main evap line, usually 5/8" OD, you must have that venting into the canister to avoid gas fumes, and you do not want that blocked with a filter or you will have filling issues. If there are smaller evap lines, either coming off the pump sender module or the tank, about 3/8" OD, those are venting the roll over valves, those should T into the main 5/8" line somewhere prior to going to the canister vent solenoid and/or canister itself. In theory, you can delete the evap/canister vent solenoid, but your OBDII fuel system leak checks will not be able to perform and you will set off engine codes, but your fuel system will function and vent fine.
02-23-2012, 02:08 PM
#6
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Well I guess there are technically 2 evap lines coming off the pump sender. One that goes to the canister and the other that runs up to the evap solenoid on the motor. I want to delete the evap solenoid and I know that's the line people put a filter on when deleting the system. I was trying to see if instead of a filter I could just tie it into the canister. Ill get the codes deleted.
02-25-2012, 07:24 AM
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Ok, you are talking about the purge evap solenoid, I was referring to the canister evap solenoid, two different things. There are a few threads about purge solenoid delete on here, do a search, here is one that might help a little:
https://ls1tech.com/forums/lt1-lt4-m...-solenoid.html
https://ls1tech.com/forums/lt1-lt4-m...-solenoid.html
