VT commodore rough idle and bad vibrations

[vs2DSIRE]

hey i was just wondering if any one could help me out here , I had extractors put on my vt commodore and ever since than it has slowly started to get a really bad vibrations and idles from any where between 650 rpm to around 500 rpm.

I have cleaned throttle body as well as plenum chamber , changed IAC valve , replaced hoses from the back off the plenum chamber , oxy sensors , alternator and transmisson mounts

Any help or feed back would be muchly appreciated as i dont no where to look next

Cheers

[tooslow]

it depends tho r th extractors new or second hand

[alpha_au]

Were the extractors put on by a reputable workshop? Is there any indication that there may be a leak? That can cause an engine to idle very rough. Also just check ur leads and plugs are in nice and snug as they would have removed them and thus may have not put them back in properly. Just a thought....

[andrewbruckshaw]

The catalytic converter could be blocked or burnt out

[wrx884]

check ur fault codes i had just recently had problems upon idle and found my EGR valve/pintle had been jammed open by some debris causing the fuel mixure 2 go all over the place hense the bad vibrations and it sounded like some1 had put a cam in it hahaha

[vs2DSIRE]

the extractors where brand new and where put in professionally also the cat is a high flow cat ,plugs and leads been changed no difference but i did notice that the vibrations and rough idle go away once the engine has got hot and runs good . ????? any one