Slight ruff idle

[wbaxter90]

my car was doing this along with other things... turned out to be a fooked injector :S

[Etches]

Changed my pot from 500 to 600 n runs way better now. Cheers boys

[Jezza-7]

Maybe its the co pot.

I dont beleive its an injector as they were serviced before fitting them and i unplugged one at a time while engine running and each one had an effect on the engine causing it to completely die.

[GR40]

does it do it all the time or just when you start it or stopping on a trafic light or something! just check the accurator on the fuel line it sounds like it doesn't hold pressure under small load! could be small vacuum leak at some point on the hose!

[dannyb.G40]

Mine idled rough and would cut out every now and then unless i blipped the throttle, turned out to be a vacuum leak. Are you sure when you were blocking the pipes off etc they are all fully sealed. Might be worth a look.

[Jezza-7]

Yeah thats a good point.

When i did the boost mod i left the fuel breather that goes into the charcoal canister as that needs to breathe, the throttle body one i blanked off with a bolt and some sealant, and the one that goes to the inlet manifold was planked the same. Will check them though as it has only happened since i did the mod.

[Jezza-7]

Checked the pipes today and they all seem fine. I re-did one as it was a little loose.

[GR40]

Did you go all the way back to the inlet? there are tubes going even under the last plastic hose before the throttle, mine had a little hole there!

[Jezza-7]

Yeah i went as far as possible. At thw weekend i will take it all off and then check it all that way, i got new gaskets and that for t/b, manifold etc.

Could the isv affect this?

[Jezza-7]

Right, i beleive i have sorted this out.

I removed the whole inlet side of parts and started again as if i was doing the boost return mod.

I took off the ISV and gave it a good clean, sprayed a load of gunk in there and it came out all black. Once that was done i checked the smaller pipeline that was blanked off and that was fine and tight, then did a pressure check on the isv pipes and the pressure held. I assembled it all back together.



My friend who was with me suggested routing the breather pipe elswhere. So we spent about half hour of putting it in different places till we found a good place. We routed it near the bulkhead making sure it was secure and away from all moving parts and it sat in the corner of the engine bay, just above subframe rear fitting point. You can see the start in the 1st pic.

Fitted a new inlet gasket and fitted the manifold. Making sure it was all connected and tight.



Cleaned the throttle body, fitted new gasket and did same for the t-piece throttle adapter. Checked the tb blank on the front side (facing the head) and it was secure and tight.



All had been cleaned and checked properly. Started car and it was ok, took a few seconds to clear the gunk and a cleaner we use at work called superclean. Best stuff in the world for cleaning parts.

Then it died.... I was annoyed to start but took it for a drive and it was fine. Got back and let it idle for 2-3 mins and it was spot on. Drove back from a friends later this evening and when i got back noticed a smell that was strange, burning oil. Checked under the bonnet and the breather had kicked out oil which untill this point had never done. So i think what my problem was, was that the breather went vertically up from the pod for a good 6-7 inches and that prevented the crankcase from breathing properly as the oil could not escape. But the new route seems to be allowing the engine to breathe.

Does this make sense?