MISSFIRE 3.9v8 ES

[harleywilma]

I HAVE A MISSFIRE ON MY 1997R V8 I HAVE CHANGED THE DISSY- PLUGS AND LEADS BUT STILL GOT A DEAD CYLINDER,IT MIGHT BE A VALVE BUT COULD IT BE DUE TO ANYTHING ELSE BEFORE I GET INTO CYLINDERHEAD REMOVAL

[steve_D]

I take it you have sparks at that cylinder?
Pull rocker covers and check the valves are opening the same amount. You may have lost a cam lobe. If so you may choose to just replace the cam and leave the heads alone. Not ideal but quick and with the engine still in the car.

Steve

[harleywilma]

THANKYOU FOR YOUR HELP IT TURNED OUT TO BE A WRONG CONNECTION ON THE DISSY DUE TO SOME SCUMBAG MESSING ABOUT WITH IT WHILE IT WAS IN THE AUCTION PRIOR TO ME BUYING IT TO MAKE IT SOUND ROUGH,WHEN I PUT THE NEW DISSY ON I JUST COPPIED FROM THE OLD ONE MY HONEST MECHANIC FOUND IT PRIOR TO A HEAD REMOVAL,IT RUNS LIKE A DREAM NOW.