vr commodore stalling and sounds like missfiring

[warrendanni]

i have a 94 vr and its stalling, i have codes 35 and 36 coming up, i have changed the coils and the leads and spark plugs, i have also changed the throttle body and temperature sensors, crank angle and cam sensors, i have also changed the map sensor as well, any ideas of what could be causing this??????????

[Brett_jjj]

Theres a chance you might have a vacuum leak somewhere.The codes you are getting will set when you get a vacuum leak because the engine management system can't control the idle speed properly.

[warrendanni]

how do i find the vacuum leak?

[hako]

Do the revs stay the same when A/C is switched on.....also have you checked the IAC valve is clean

[Brett_jjj]

You will just have to check all the hoses around the engine to make sure none are dislodged or split.Theres some going to the purge cannister near the radiator ,someone here who actually owns a VR might be able to be more specific as to where they actually are on the VR engine.

[warrendanni]

Do the revs stay the same when A/C is switched on.....also have you checked the IAC valve is clean

cheers for that what is the iac valve?

[warrendanni]

You will just have to check all the hoses around the engine to make sure none are dislodged or split.Theres some going to the purge cannister near the radiator ,someone here who actually owns a VR might be able to be more specific as to where they actually are on the VR engine.

cheers whats the purge cannister?

[Brett_jjj]

The purge cannister collects fumes from the fuel tank,and holds them,then from there it gets sucked into the engine and burnt.Its pollution gear .The hoses that run to and from it, just follow them and check them,especally the ones that go to the engine.

[Brett_jjj]

Iac valve is Idle air control valve.It controls the idle speed.It can cause this as well if its dirty or faulty.

[warrendanni]

The purge cannister collects fumes from the fuel tank,and holds them,then from there it gets sucked into the engine and burnt.Its pollution gear .The hoses that run to and from it, just follow them and check them,especally the ones that go to the engine.

ok cheers for the info, would that really make it stall?

[warrendanni]

Iac valve is Idle air control valve.It controls the idle speed.It can cause this as well.

how do i locate it?

[Brett_jjj]

Im not sure exactly on the VR,it would nearly have to be around the plenumn inlet/butterfly,where the plastic air intake pipe goes to the motor from the air filter box.It will have an electrical plug connected to it.
It is a round looking thing.Theres two screws that hold it in.One either side

[hako]

On the VS it's on the throttle body so maybe the VR is similar - I see you replaced the throttle body...was there a reason for this and is the throttle body clean? I've attached a how to for the VR which also includes cleaning the IAC. Good Luck.
CleaningThrottle Body VR V6

[warrendanni]

On the VS it's on the throttle body so maybe the VR is similar - I see you replaced the throttle body...was there a reason for this and is the throttle body clean? I've attached a how to for the VR which also includes cleaning the IAC. Good Luck.
CleaningThrottle Body VR V6

yeah the process of elemination lol, yeah i cleaned in with a bit of petrol