HELP!!! vn ss running rough

[ss_5spd]

hey guys i just got a vn ss and its running a lil rough on idle but it wont rev?? any suggestions? already changed the plugs,leads,cap and rotor.

please help

[clubsport_replica]

when u say it wont rev does it die or will it only rev up to say 2g or something???

[ss_5spd]

as soon as u try to rev it starts to muffle and then cut out

[clubsport_replica]

apart from the obvious all parts changed are fitted correctly i take it the problem was there before parts changed?

have u looked at the fuel system at all, been an ss i take its got the two fuel pump in the rear internal n external make sure both are pumping fuel, check fuel filter and also pull the rail off n check the bottom of the injectors i had a vq stato that was similar but i could get it to rev to a certain point 1800rpm no higher even with foot flat turned out most/all of my injectors where clogged with shit

[ss_5spd]

ok cool thanks mate il look at that. and yea the problems were there before

[ss_5spd]

theres only 1 fuel pump in the tank and thats it. is there supposed to be another 1?

[clubsport_replica]

no only some had the two fitted by mine were 1990 models 1 vn ss and 1 vq sato

[304runner]

Injectors need a good clean I recon.. Take them out nad have a look at them...

[ss_5spd]

is there any way to clean and recondition them or just replace them??

[Burnout124]

fuel pressuer problem or could be map sensor. some times a faulty coil can give this problem

[ss_5spd]

where is the map sensor located?? iv only just got the car and never had a commodore before.

[db_notso]

engine light on? diagnose the code then.....

if idles ok (all cylinders the same when unplugging injectors to test for misfire, revs drop when unplugged on a good cylinder)
then map sensor...............and likely code

if not a MAJOR intake leak or a misfire (bad multiple cylinders) and no engine light on
need to check fuel pressure angainst specification which i dont remember off the top of my head....

finally if none of the above check compression pressure on each cylinder dry and wet at the temp that the fault is happening (cold or hot etc)
dodgy backyard check for minor split(seperated) head gasket leaking into cylinder drain coolant and start car if idles correctly coolant entering combustion chamber.....

and finally although unlikely multiple leaking injectors OR crank sensor incorrect signal (timing out)

[clubsport_replica]

with the injectors i just soaked mine in some petrol for alittle while to dislodge what i could then used a carby cleaner to squirt to remove the rest, but i dont think it costs too much to get them recoed at a shop also check ebay can pick up some cheap new ones

[ss_5spd]

thanks guys il check it all out

[clubsport_replica]

how did u go mate any luck yet...

[ss_5spd]

yea i pulled the injectors out and they were rusty in the spray heads so replaced them and everything is perfect now

[vyseriesII]

It sounds like when i had my vr. One of the coil packs shat. Ah injectors, the next likely of the subject.