replaced engine. fuel pump/HT leads/sparkplugs/ignition coil/electrics ok,all sensors check out fine. Engine turns over, engine tries to start, fuel ignites but still no luck in starting engine. Am thinking of checking compression of pistons but not sure about this action. Any clues or hints pls help

 

are all 4 cylinders gettin spark???
if they r i wud get the compression checked mate

 

or check the firing order is correct or did you change the #HT leads 1 at a time? or just wip them all off?

 

Don't forget on this engine the firing order is 1/2/4/3 and not 1/3/4/2 as 99.9% of 4 cylinder engines.
tabetha