[TN99Altimaguy]

My 99 has 85K miles. I replaced the spark plugs with the proper brand, new plug wires, new distributor cap and rotor button. I have an engine miss at idle only. I ran Lucas gas treatment thru the tank twice w/o any improvement. The trouble code P0304 (#4 cylinder misfire) is more or less a blanket set of reasons. Has anyone else experienced this same problem?

Thanks,
Gene Talley

 

[Spddracer]

My 99 has 85K miles. I replaced the spark plugs with the proper brand, new plug wires, new distributor cap and rotor button. I have an engine miss at idle only. I ran Lucas gas treatment thru the tank twice w/o any improvement. The trouble code P0304 (#4 cylinder misfire) is more or less a blanket set of reasons. Has anyone else experienced this same problem?

Thanks,
Gene Talley

Intake gasket is blown at #4 bank.. Spray some wd or carb cleaner down around #4 runner and watch you idle change.