Misfire

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Author Message   anthony heflin (Anthony) New Member Username: Anthony Post Number: 10 Registered: 03-2004 Posted on Tuesday, April 06, 2004 - 07:26 pm:    yesterday, during acceleration at about 50 my 96 disco w/107k started to misfire and the ce came on. codes are p0301 (misfire cyl. 1) and p1316 (ignition system or misfire). i have read all related posts but am unable to find specific two together. i reset the codes and no new ones since about 15 miles but truck is idling a little rough and feels like misfiring at different speeds. vss? how to check for sure? stepper motor? coil pack? plug wire? valve job? any suggestions?   anthony heflin (Anthony) New Member Username: Anthony Post Number: 11 Registered: 03-2004 Posted on Tuesday, April 06, 2004 - 08:55 pm:    pulled plug #1 and it had carbon build up on one side only, also assessed that it sputters a bit out the exhaust when you rev it up and let off gas. What could cause carbon on one side only? any ideas?   Joey (Joey4420) Senior Member Username: Joey4420 Post Number: 724 Registered: 04-2003 Posted on Wednesday, April 07, 2004 - 10:23 am:    I would say plug or plug wire.   anthony heflin (Anthony) New Member Username: Anthony Post Number: 12 Registered: 03-2004 Posted on Wednesday, April 07, 2004 - 05:52 pm:    guys, found a place under plenum and around fuel rail and injector above cyl. 1 where a rat had made a nest from the hood insulation! could this have been causing some kind of an overheating issue @ cyl. 1 that could have caused misfire?   Geoff 93 RRC (Geoff) Senior Member Username: Geoff Post Number: 324 Registered: 11-2002 Posted on Wednesday, April 07, 2004 - 11:22 pm:    More likely the rat's nest may be causing a short somewhere. Check the wire insulation for the fuel injectors and plug wires. Also the coil pack. The spark plug gap is important or you'll get misfire. If not platinum plugs check that the gap is tight. The spec should be under the hood on one of the stickers. Re-gap if necessary.   anthony heflin (Anthony) New Member Username: Anthony Post Number: 13 Registered: 03-2004 Posted on Thursday, April 08, 2004 - 04:34 am:    will check tomorrow, thanks   anthony heflin (Anthony) New Member Username: Anthony Post Number: 15 Registered: 03-2004 Posted on Thursday, April 08, 2004 - 05:02 am:    would a valve seat or guide issue cause the one sided carbon build up?