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DRAINING GASOLINE FROM DIESEL FUEL TANK
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=98&t=81880		 Page 1 of 1
Author:  gmctd [ Sun Apr 19, 2015 11:15 am ]
Post subject:  DRAINING GASOLINE FROM DIESEL FUEL TANK
Draining gasoline from fuel tank

There is no OEM production-line installed lift pump in the fuel tank
- this is a vacuum-type system, pumped by an internal lift pump inside the Injection Pump
- this is why you must use some external method to drain the tank
- e.g., manual pump or electric pump

A. If engine has not been cranked or started:
- disconnect rubber from-tank hose at fuel filter\manager head
- attach a manual or electric fuel pump (FACET 40109\equiv) to that hose
- attach suitable length of rubber tubing to pump outlet to reach drain container
- commence evacuating fuel tank
- re-fill with Diesel fuel
- add your fav Diesel fuel additive
- pump till Diesel fuel flows into drain container
- reattach rubber from-tank hose to filter inlet
- prime fuel filter, bleed, noting pure Diesel fuel odor
- if not pure, need to drop filter for further examination
- if gasoline\Diesel odor in filter element, follow B: procedure


B. If engine has been started and run, the likely best method is to:
- disconnect the rubber from-tank hose at fuel filter\manager head inlet
- attach a manual or electric fuel pump (FACET 40109\equiv) to that hose
- attach suitable length of rubber tubing to pump outlet to reach drain container
- commence evacuating fuel tank

Next, reconnect that from-tank hose to the filter
- remove and drain the gasoline-contaminated filter, then re-install it
- disconnect the rubber from-filter hose at the Injector pump inlet
- install the drain pump to that hose, continue to drain fuel until you get the odor of Diesel
- re-remove the gasoline-contaminated fuel filter element, toss
- install a fresh fuel filter element
- continue to pump from the Inj Pump supply hose till you get pure Diesel fuel
- reconnect that hose to the Inj Pump
- you've cleared the fuel-supply system

Next, you'll need to drain the Inj Pump and the Fuel Rail
- DO NOT remove the Fuel Pressure Regulator or the FUEL Pressure Sensor - both have a non-reuseable hi-pressure soft-washer
- disconnect the electrical connector from each injector
- remove the Fuel Return line that goes to the tank from the plastic "TEE" connector
- place a rubber hose on that "TEE" barb long enuff to reach a drain pail
- alternately, loosen hi-pressure connection at each injector, results in at least one cup of raw fuel draining onto engine
- crank the engine till you get the odor of Diesel fuel from that line

Next, connect your drain pump to the Fuel Return line that goes back to the tank
- drain the gasoline from that line.
- reconnect

Now would be a good time to install an auxiliary electric fuel lift pump, but you can prime the system with the filter primer

Should now take a short while for the engine to start and run as the fuel system clears

NOTE: CP3 internal pressure is regulated ~80psi
- only method of clearing contaminated Inj Pump and Rail is to crank engine with Injectors disconnected from ECM
- this will cause several DTC's to log, but must be done
Author:  user113 [ Tue May 12, 2015 9:49 pm ]
Post subject:  Re: DRAINING GASOLINE FROM DIESEL FUEL TANK
Procedure "B" seems to be missing "refill with Diesel fuel" step, presumably right after replacing the filter?
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