others opinions before i jump feet first.
Turbo Mini Forums

got a constant misfire on no3 cylinder. changed everything ignition wise for new so i know that side of things is good. compression check is well into the green on the gauge on all cylinders, so again, tickety boo. no air leaks as i have just made all new gaskets out of 1.5mm copper.

no oil or water loss anywhere either.

what you all think. i think i have a knackered valve or something like that. anyone suggest anything before i spend a week doing it?

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

Could check the rocker clearances, make sure the valves are closing fully, though if comp is OK its more likely to be ignition

Paul

I seriously doubt it!

the valve could be expanding with heat though Paul and closing the gap.


carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Very true

I seriously doubt it!

hmm. i havent checked them accuratly, only to see if there was a gap. they are s/s valves though.

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

valve sticking in a guide?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Leakdown test?

i dont have a leakdown tester. i think i am going to have to check the valve in the guide with the spring off.

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

you need a leak down test next really...

AlexF

this has proper got me down now. seems i cant win with this bloody engine!

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

stu, do the compression check when the engines hot it could be as pointed out the valve sticking in the guide.

especially if you are using manganize guides.

they are the bronze guides so that is a poss. so...... check clearances on rockers, hot compresion check and check valve stickage, leak down test. if they fail, head off. (which is an absolute cunt!)

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

you could try some forte top-end treatment in the inlet, have doen this before on small block(16v fly by wire throttle) vauxhalls that suffer badly from sticky valves, sometimes cures it permenantly sometimes cures it for a few hours, but is a pretty sure fire way of identifying sticky valves on these lumps :) never tried it on an "A" though.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

if this is the case stu the guides will require reaming, i suspect this has not been done ?

with you only living at hull, you could pop over and i will sort it for you in the same day!

You say you've vhanged everything ignition, do you have spark?

oh yes. lots of spark. new ecu,leads and plugs.

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops