Rough Idle After Drive

[V8hilux]

Hi guys I have just gotten my 1UZ hilux going, using a UZS131 Crown engine and ecu, with 5 spd manual.

When started it will warm up and settle down to an idle speed of 600revs, which is good. After a drive around the block, the idle will pick up to around 1000 revs and sound a bit lumpy.

I Currently only have extractors with O2 sensors near the end, Could the lack of back pressure be causing it to run lean?

Also, check engine line comes on and gives codes 42, 83, 84 and 85.

Any help would be appreciated.

Cheers.

 

[sideshow]

42 is speed signal to spd terminal
dont worry bout it

i think 83 84 85 might have to do with auto cant remember off top of my head

u can run them without o2s and should not miss

u might have an air leak causing llumpy idle and hi revs

block or crimp the hose to the idle motor or iacv whicjhever u call it

then check leads crown engines are from the prehistoric ages these days

so leads are first thing that go

but that wont explain hi idle