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MK sd33t - Fuel problem

Tech Talk for Nissan owners.

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Posts: 9
Joined: Tue Mar 01, 2005 8:47 pm
Location: Newcastle,NSW

MK sd33t - Fuel problem

Post by otis05 »

Hey, took my MK LWB out to the beach. Started having fuel problems. first missing then no power. Let stand for a few minutes - started Ok and we went 10m before same symtems - no load rev, max revs at 1,000, eventually dying. any ideas. took off retuen fuel line and blew out ok, the primary pump seemed to have no pressure build up, so tried a few times, not getting a lot of fuel out of injectors when cracked the inlet unions....help.
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Post by Wish I had coils »

Hey check out our fuel cut of motor, disconnect rod going to the electric motor and make sure that it is going to the run postion.
My mates was running but could only drive it in low range to move it in his shed, it would'nt rev so we haqd a play with the fuel cut off and hey presto it goes like a shower of S#$T now.
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Post by pongo »

Filters ?, they have a small mesh screen on the intake side banjo bolt on the lift pump. Mine is always getting blocked
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Post by Brendan-s »

Wish I had coils wrote:Hey check out our fuel cut of motor, disconnect rod going to the electric motor and make sure that it is going to the run postion.
My mates was running but could only drive it in low range to move it in his shed, it would'nt rev so we haqd a play with the fuel cut off and hey presto it goes like a shower of S#$T now.
could you please provide more info on this? cant find it anywhere in my FSM and i am having the same problems. wont keep fuel up to the motor.
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Post by Patchy »

pongo wrote:Filters ?, they have a small mesh screen on the intake side banjo bolt on the lift pump. Mine is always getting blocked
shouldnt always get blocked, i would be draining the tank probably has shit in it
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Post by pongo »

Patchy wrote:
pongo wrote:Filters ?, they have a small mesh screen on the intake side banjo bolt on the lift pump. Mine is always getting blocked
shouldnt always get blocked, i would be draining the tank probably has shit in it

Its more to do with what i put in my tank. no matter how well i filter my vege oil, i cant quite get it all.

:lol:
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Post by mattstar »

I think the fuel cut-off motor previously mentioned is the enig motor on the drivers side of the engine block, there is a round plug near the wiper relay. If you unplug it you will have to install a stop cable, or pop the bonnet every time you need to shut down, that or stall it! It doesn't affect glowplug timer or start up but when you turn the ignition off the motor will continue to run. It may also pay to dissconnect the connecting rod from the enig motor to the fuel line because if it's starving for fuel just unplugging the motor won't correct the position of the valve.
The enig motor stops the Diesel motor by controlling a valve in the fuel supply line, full open for start, standard run (nuetral position) and stop, closed. I had a very similar sounding problem and found I had to disconect it and install stop cable (from a Mack)
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Post by Brendan-s »

Thanks for the info Mattstar I will look tomorrow when I get the chance
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Post by herks »

I tend to agree with Pongo. The primary filter in the banjo (where the fuel line connects to the lift pump) is a good place to look first.
That is where I find all my blockages, caused by crap from the tank.
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Post by otis05 »

Thanks for the tips. I did not look at the fuel control motor, but it does sound feasible. We checked the injectors, etc, when we stopped and it all seemed ok. We broke down middle Stockton beach, so gettign a tow out was not easy - embarassing it was up to a cruiser with mods to tow us out. I shall check the pointers above and let you all know. Did have some trouble with the controller some time ago - but it was more not stopping - took it apart, few sprays and worked well. Will post later
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Post by otis05 »

Thanks "Wish I had coils" - I have to charge battery and crack injectors again to get it running smooth - then I will take off the rod. Are there only 3 settings - stop, run and go, if so it will be easy to set the fuel pump run on the pump.
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Post by Patchy »

pongo wrote:
Patchy wrote:
pongo wrote:Filters ?, they have a small mesh screen on the intake side banjo bolt on the lift pump. Mine is always getting blocked
shouldnt always get blocked, i would be draining the tank probably has shit in it

Its more to do with what i put in my tank. no matter how well i filter my vege oil, i cant quite get it all.

:lol:
yeah that will probably do it :lol:
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