having some dramas, pre ignition

[Matt_vp]

i have been having some dramas with my wagon, for the last month, when give it full throttle it will rev to about 3000-4500 then start breaking up, i thought it might of been fuel related but yesterday it started preigniting, so i was thinking it might b CAS related, does this sould like the CAS is about to die or do they just stop working. Any ideas?
thanks Matt

[aussieghostrider]

yeah the CAS can cause alot of problems they die every 5 years or so I was told.

its a piece of plastic with metal sensors inside it.

it can cause stalling when hot , bad timing , bad idle etc

Check your spark plugs & Leads also could be coilpack/dfi is stuffed and cant handle the high revs.

[Lost_Pete]

The only time I have had pre-ignition or knocking in my V6 is when the fuel pump was dying and making the engine run lean (not enough fuel pressure) under high load, high throttle.

[Matt_vp]

well i changed the CAS and balancer, put in new super4 spark plugs. the pre ingition has stopped but is still breaking up under full throttle, seems to b when it gets to 6-8psi. it only does this when it warms up, if i jump in turn the key and take off, it will rev through cleanly then when it warms up it plays up.
Matt

[greenfoam]

The timing on the new engine might be a few degrees different Matt, just add some fuel and pull a few degrees out and see what happens

[Matt_vp]

i tryed adding more fuel, so ill loose a few degrees and see what happens. drags are 2morrow night so hopefully that is it and it will run.
Matt

[Matt_vp]

i think i have found the problem, i pulled my 2 bar map sensor off, cause i was thinking about moving it to the drivers side away from the heat of the zorst pipe. but anyway i blow into the vacum hose and the air was coming out the top of the map sensor, so i took the top cover off and it had blown the top off the little box inside, good old locktight instant adhesive fixed it for now but i will get a new one, or maybe a 3 bar.
thanks for the suggestions everyone
Matt