Definitely need some advice here. I was a general tech now working at a Toyota dealership. I have a 97 mountaineer 5.0 v8 that i had an intermittent p0304(cylinder 4 miss) at heavy acceleration. I did a complete tune up(plugs wires fuel filter and fuel system cleaning). Now about 3 weeks later its now a dead miss cylinder 4. I checked for spark from the plug, nothing. I used an inline spark tester that lit up like a christmas tree but still not spark from the plug. Common sense says replace the new bad plug and recheck. It ran decent for about 15-20 minutes than went to crap again. My next step is checkin injectors but Im just wondering if anyone has found a solution to this problem. I have scanned the internet and asked everyone and no one has a definite answer, but everyone seems to have the same problem. Any help would be greatly appreciated. Thanks
Nov 15, 2007 at 8:34 PM