Outer Limits 4x4 Board

anyone got ideas what can cause 'running on' in a diesel??

EG turn the key off, and it tries to shut down, but does it very slowly..

sounds like the Shut of solenoid mounted on the back of the fuel pump is dodgey im told it's possible to remove it and clean

also check in the intake pipes for any oil. if its been overfilled with oil they can blow enough through the breather for it to run. same goes for worn turbo seals.

thanks people.

when my bat terminal jumped off the bat, i couldnt turn it off either, took the key out and gave it to my mate in another truck and kept driving just for the sake of it , turned off as soon as i re-connected the terminal, so prehaps ya fuel cut-off is getting no power ??

macca81 wrote:when my bat terminal jumped off the bat, i couldnt turn it off either, took the key out and gave it to my mate in another truck and kept driving just for the sake of it , turned off as soon as i re-connected the terminal, so prehaps ya fuel cut-off is getting no power ??

You would have thought yourself to be pretty clever right?....................

Till the steering lock, locked on

macca81 if it were a mq you could be correct. but on a mq the solinoid is open when no power and closed when power
on a gq/u its the opposite so if he had a flat battery or no -ve it would not run at all

also on a mq you can manualy open and close the solinoid on a gq/u you cant (as far as i know)

my guess bogged is the cut of solinoid is not completly closing. it is common for them to either only half open or half close
as id doubt you car has enough k's to have issues with burning its own oil and from memory you dont have a turbo to have blown seals in yet

i guess you could diagnose this by unplugging the solinoid while the motor is running n seeing what happens

the intercooled td42s have a butterfly on the inlet side of the intercooler this is an air shut of it is vaccum operated and shuts of air to the engine when it is turned of check the hoses are connected and servo is functioning if all is ok take intercooler inlet pipe of and check to see if its gumed up with oil and crap clean with carby cleaner if nessary

Workshop manual for TD27 has

says valves requiring a tune up, needs to be tuned around every 20,000klms.

the shut off valve only closes a 1/3 of the way, how can this shut off air supply?

It may act as a restrictor, but not a dead shut off. This vehicle is also fitted with an immobilser unit over the stop solenoid. Cant remove the solenoid without removing the injector pump, the immoboliser unit has shear bolts clamping it on.

Andy

cloughy wrote:

macca81 wrote:when my bat terminal jumped off the bat, i couldnt turn it off either, took the key out and gave it to my mate in another truck and kept driving just for the sake of it , turned off as soon as i re-connected the terminal, so prehaps ya fuel cut-off is getting no power ??

You would have thought yourself to be pretty clever right?....................

Till the steering lock, locked on

yeah i kinda broke the streering lock about a week after i got it... left the keys in the other car which wasnt around at the time so had to us a screwdriver to go to the shop

badger wrote:macca81 if it were a mq you could be correct. but on a mq the solinoid is open when no power and closed when power
on a gq/u its the opposite so if he had a flat battery or no -ve it would not run at all

ignore me then

a mate if mine had this issue, nissan replaced the injectors before they relized it was the fuel solanoid (warranty 2 months old)

I just picked up a GU ute today & it runs on REAL bad, say for about 15 seconds .

It's a 99 td42t.

Could this also be a fuel solanoid prob or some thing in the pump. The guy I purchased it from said it had something to do with the pump but he never had it checked out.

Any ideas???

my GQ was doing this, and i was tryin to work out what it was, ended up being idle speed, as it was idlin at 500-550 rpm, upped it to 700-750 and hasnt been a drama since,

may not be your prob but it solved mine,

good chance it does

be just my luck. everone elses seizes open ........... i could deal with stall stopping it. but mine had to be closed so it wouldnt even run

fuel cut off solinoid could be, could also be injectors, what car are you talking about? could stop a lot of guess work with throttle butterflys etc

GU BUG wrote:I just picked up a GU ute today & it runs on REAL bad, say for about 15 seconds .

It's a 99 td42t.

Could this also be a fuel solanoid prob or some thing in the pump. The guy I purchased it from said it had something to do with the pump but he never had it checked out.

Any ideas???

It's stated here in my previous reply.

99 GU ute, td42t. No Cooler.

was askin bogged what car he was askin about. all of the resopnses are relative to you. it could be somethin in the pump also. the whole injection system relys on break off pressures, if any related component is worn then it could allow fuel to keep flowing thus the car would run on.