Valver Wont Start (Williams Engine)

[Plattsy]

Hi,
My valver wont start now for some reason, i was driving along but when idling the revs would drop to around 400 then shoot up to 1500 but then die again slowly. I checked all the HT leads and noticed a small amount of oil in the plug chambers, this was after it just died. I checked all fuses and everything and wont start it just turns over and doesnt seem to kick in.
Any help would be greatly apreciated as i have no car now. if i can not fix it i will be breaking it so if the engine is ok and just something inside broken then i will still probably break it depending whats wrong.
Thanks

 

[theduck]

idle control valve?

 

[Plattsy]

doesnt that control idle though not whether it starts or not, its not firing up just keeps turnin

 

[arj256]

Checked the spark plugs?

 

[Martin_172]

the problem with the revs jumping about sounds like the idle control valve but im not sure if it can stop it from starting.

 

[steve a]

First of all need to make sure your pluggs are sparking (take the plugs out ground them on the engine block and turn the lump over) also that your getting fuel i.e wet plugs.

 

[bang]

check distributor cap see if the metal plate pipe thing is worn.

 

[Dan@SJM]

sounds like your crank sensor, if there is no spark, there wont be any fuel. qand it'll be your crank sensor up the duff.

 

[Plattsy]

wheres the crank sensor and how can i change/check it? same for ICV and the plate on the dizzy

 

[BRUN]

the crank sensor is on top of the gearbox

you need take the airbox off to see it

 

[BRUN]

a sign if the timing sensor is buggered, is when you turn the key in the ignition, not starting it, but turn it to just before you start it, the needle on the speedo should jump up a little bit, only like 2mm, if it does that it might be ok, if it doesnt it might be worth changing it

 

[Plattsy]

could it be a cam belt snap?

 

[benji&eka]

you would hear that, the engine would turn over really easily making the starter motor sound higher pitched

 

[BRUN]

mine used to be a crap starter, changed loads of things on it and put a few bottles of forte through it and its ok now