idling problems b18ft

[Nifton]

Originally Posted by razzy69

Still having the same problem, everything else is working perfectly. tested the icv and cleaned it out, knock sensor is functioning correctly, lamba sensor is working. all hoses have been vacuum checked. the only thing that is not connected is the head temp sensor as i dont know where it wires into ( conversion on R5) as i said it runs sweet cold as it hits 70-80c it starts to lumpy idle and black smoke comes out. if i turn her off and back on while its still hot its even worse???

Does it still have the original bound rubber vacuum seals? I had a problem with a set that had persihed and you couldn't see the damage at all, it produced these exact same symptoms, including nasty black soot spewing out the exhaust. replaced with some silicone piping and sorted it right out.

[asdadavy]

hi.

have you checked or had checked your exhaust manifold inlet gasket as mine was blown to bits i had what can only be described as a misfire and was burning rich which progressively got worse over about 2 months if i was at traffic lights stationary car would run very rough on idle i replaced everything ht leads,sparks,dizzy,rotor arm,idle control valve, m.a.p sensor
even compression and injector tests and it was still the same.
i spoke to the technitions at volmech in stockton and he said that the exhaust manifold inlet gasket are prone for breaking down and failing and this causes the engine not to run properly on idle.

hope this helps.

dave