hi guys im in need of some help guys, ok recently my dad has picked up a another el falcon 6cyl auto, anyways we've done major service and changed plugs leads coil fuel filter air filter, and have put new injectors in also anyways the car was running great for a thew days and slowly started to pick up a rough idle but only on idle as soon as you accelerate it goes away and runs great we checked over everything that we have done made sure the gaps were set right and so on but its has got worse but it still only does it when on idle or verry low rpm as soon as its under load it goes away and runs fine but if you pull up at a set of lights or whatever it comes back and idles rough again, im puzzled as to what could be causing this problem and any help would be much appreciated. thanks guys

Checked for vacuum leaks ?????

no not as yet do you think that could cause the problem??

had a look over vacums but still nothing any idea on what vacum could be causing it??

Vacuum leaks can be in all sorts of places.....mainly the intake manifold gasket....checked that yet ???
I use carby spray with a nozzle n straw for more direct targeting....if the revs pick up, then thats where the leak is.

no havent looked there yet but ill grab the carby cleaner out tomorrow and have a go with that and get back to ua, thanks for your help mate

Brake cleaner spray works even better. Check all the gaskets between the throttle body and head, all vacuum hoses, and where the injectors go into the manifold. And don't be stingy - go slow enough to completely wet the surface.

thanks for the help guys turned out to be a busted inlet manifold gasket all sorted now and running great again, much appreciated

oh yeah cjh the carby cleaner worked great thanks again champ

No wuckas bloke.....that's all I use....hasn't let me down yet.

Oh, btw, I use high temp grease on the intake gasket....it keeps it supple for longer.