Vn Idle Problem

[keatz_RedVN]

Hey, ive got an 88 VN exec. auto and my motor wont start unless i give it some accelerater while turning the key, and once its on its ok when im reving but as soon as a take my foot of the accelerater it just stalls on idle.
Does anyone have any suggestions to what the problem is

[Tony]

not really sure, but with those symptons im guessing fuel injectors are gone?

[holden5l]

Hi.Pull out the engine fuse. located in engine bay.For 15-20 sec. Replace fuse make sure air con is turned OFF start engine and rev engine to 3000 rpm approx and hold there for 10 sec. all should be reset and idle fine.

[keatz_RedVN]

it ended up being something to do with the ISU

[VTSSDUDE]

Can I ask what is the ISU.

Cheers,
Jim

[Garth]

what is a isu? this has got me stumped

[jafo]

id say they mean icu

[keatz_RedVN]

sorry guys for confusing u, yes i meant ICU

[OSL-060]

Shouldn't it be a IACV on a VN?- Idle Air Control Valve.

ICU- Idle Control Unit? Mind you it's a decent acronym for the bugger, they do require intensive care when constantly getting covered in blow by.

[arty]

Hi there all,

Mine also stalls sometimes when on idle, so that means my ICU might me faulty.
Where is the ICU located??
How do I check it???


Regards,

Arty

[keatz_RedVN]

Since ive got my car fixed i seem to be going through fuel alot quicker , i reckon it'd be up to something like 15k/L, well thats what it feels like anyway

[keatz_RedVN]

not 15k/l, i mean 15L/100Km

[murri_rose]

did u find out what icu is and where it is located i have the same problem

[VPower]

ICU- Idle Control Unit? Mind you it's a decent acronym for the bugger, they do require intensive care when constantly getting covered in blow by

darn EFI motors. a carbed would never have these starting problems (with a pull choke)
but go the efi for its bit of extra power

[OSL-060]

did u find out what icu is and where it is located i have the same problem

The mentioned ICU, is actually the IACV (Idle Air Control Valve), it's found on firewall side of the throttle body. If you remove the throttle body it's quite easy disassemble and clean, about 30mins max job. Doesn't hurt to get new throttle body gaskets either- less than $5 for both from Holden Genuine.