tune resistor

[chimalsu]

hi all,on a recent trip my 4.0 hc 96 chimaera cut out after about 50 mile but as i was travelling down hill she bumped back to life and drove faultlessly for another 30 mile to my destination,and the following morning doing the return trip.last week after about 14 mile she cut out again,and restarted after a couple of tries and carried on for a further 3 mile before cutting out again,after a couple of tries restarted and this time only ran for a few hundred yards before cutting out again,this time she would not start and breakdown was required.after a couple of hours the breakdown man arrived tried the engine and started first time only to manage a further 100 yards not to start again so was recovered on a wagon,the following morning car started as usual.putting on rovergauge fault 21 light up -tune resistor,also map 0.i have two questions if anyone can help
a)could this be the cause of the cut outs or is this another problem.
b)where the hell is the tune resistor hidden as i have searched the footwell/batt area i cannot find the dam thing
any advise would be appreciated.cheers alan

[chimalsu]

hi thanks for the replies.blitz yes the rev counter zeros when it stalls i had a similar problem years ago and a new fuel filter sorted it out,i have bought a new one to put on.i put rovergauge on the car and it comes up as map 0,resetting the ecu doesnt change the map and it shows fault 21,i have searched everywhere in the footwell but cannot find a tune resistor anywhere in the loom,do they put them anywhere else?

[chimalsu]

i found this little blue plug higher up the loom but no resistor,if this is the plug the car has run without one for the last ten year

[chimalsu]

hi blitz thanks for reply,i have ordered the resistor,resetting the ecu does nothing still runs map0,so i must have been running like this since i bought the car years ago,its always idled around 11k but has never really given me any problems,but i obviously dont know what it would drive like in correct mode,so i figured it was worth trying a resistor to see what happens

[chimalsu]

just to add my only fear is someone has removed the resistor previously to mask a different problem in the past

[chimalsu]

tune resistor now fitted,map changed to map 5 from zero,not been able to drive but no noticable difference in running.screen shots of both maps below
map 0

map 5

[chimalsu]

engine idled for about ten minutes

[chimalsu]

[chimalsu]

hi blitz,thanks for the reply,not had chance to go for not run,salt on road here in derbyshire so she's tucked up until spring.if she's not running right in spring i will try and take it to someone who knows a lot more than me,and resurrect the thread.cheers alan