engine missfire trouble code po304?

AAtold me trouble code po304 replace colipack & plugs.I did still got missfire
vauxhall astra y273vbf 1.4 ecotec petrol
paul, March 2005


done
same engine code changed mass air flow ,lamba sensor .crank sensor still no luc any ideas

dan, January 2011
try checking timing chain, and they also had the ecm reprogramed as did the primera p12s while under warranty

derekj, January 2008
lets think about this ...... maybe start the engine take some starting fluid ... spray on the intake manifold where the gasket is perfer around cylinder 4 maybe you will see a change in running ... maybe do it when its good and warmed up

master mechnec, April 2007
They had alot of problems with injectors also

bg, October 2005
on my auto data cd it says fault p0304 in cyclinder 4 misfire cause engine machnical fault,wiring, ignition/fuel system, injector, ect/maf sensor, ecm hope it helps

shaun, June 2005
head gasket betwwen cylinders 2 and 3

stu, May 2005
link Click here to see other fixes for Vauxhall Astra.