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Author Message   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 424 Registered: 11-2002 Posted on Saturday, June 14, 2003 - 01:23 pm:    Check engine light is still on for misfires. I changed the plugs. Not it. Just put on another set of Magnecores. (Last set was 3 mo. old and fixed the problem last time) Still here. What would be my next step in isolating this problem, short of taking it to the mechanic?   D. Chapman (1hank1) Senior Member Username: 1hank1 Post Number: 326 Registered: 02-2003 Posted on Saturday, June 14, 2003 - 01:36 pm:    Carbon? Check and make sure your wires are not touching each other or anything metal.   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 426 Registered: 11-2002 Posted on Saturday, June 14, 2003 - 01:53 pm:    Wires are good. Thinking maybe carbon. Going to try some seafoam if I can figure out what intake it needs to be sprayed into.   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 427 Registered: 11-2002 Posted on Saturday, June 14, 2003 - 01:54 pm:    Will it hurt it to drive with random misfires? I am planning on driving to Florida in a week or so and would like to make it there and back without blowing anything up.   D. Chapman (1hank1) Senior Member Username: 1hank1 Post Number: 327 Registered: 02-2003 Posted on Saturday, June 14, 2003 - 02:00 pm:    Maybe the trip will blow out the carbon. Don't count on it   Mike Bauer (Mikeb) Member Username: Mikeb Post Number: 53 Registered: 02-2003 Posted on Sunday, June 15, 2003 - 11:22 am:    What year Disco?   Mike Tamayo (Mt_9) New Member Username: Mt_9 Post Number: 9 Registered: 06-2003 Posted on Sunday, June 15, 2003 - 12:33 pm:    i had a similar experience after a shop put in the wrong plugs and they said that they had to replace the plugs, wires, and starter coil.   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 428 Registered: 11-2002 Posted on Sunday, June 15, 2003 - 01:06 pm:    97. I have the same size plugs I have always used.   M. K. Watson (Lrover94) Senior Member Username: Lrover94 Post Number: 846 Registered: 02-2002 Posted on Sunday, June 15, 2003 - 10:17 pm:    disturbator cap? mike w   Alan Greening (Alan_g) New Member Username: Alan_g Post Number: 17 Registered: 04-2003 Posted on Monday, June 16, 2003 - 06:40 am:    Make sure your plug leads are the right spec for resistance etc... Sometimes the extra electromagnetic field created by non-spec leads can be enough to interfere with the engine management computer. My dad had similar problems, the main dealer put two new computers in before a friend noticed the wrong leads.   Steven Ratajczyk (Stevenr) New Member Username: Stevenr Post Number: 11 Registered: 05-2003 Posted on Monday, June 16, 2003 - 01:32 pm:    I have had that light go on twice. once when I got my 99 Disco1 (at 28k) and then 3 weeks later. Same issue... Misfire. Premium gas could solve problem. Took mine to LR dealership and they said I'll probably need a valve job at $1900. 4 months and 8000 miles later I have been fine. Maybe last owner used bad gas, maybe I do need a valve job, I don't know. Don't know if this helps even helps at all.   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 431 Registered: 11-2002 Posted on Monday, June 16, 2003 - 02:42 pm:    97-No distributor. I only use premium. How do I check the electromagnetic leads for thr correct resistance?   jim randall (Rover47) New Member Username: Rover47 Post Number: 31 Registered: 01-2003 Posted on Monday, June 16, 2003 - 03:33 pm:    Hi Greg, The resistance should be about 3-6.5K ohms per foot. Measure with an ohm meter.   M. K. Watson (Lrover94) Senior Member Username: Lrover94 Post Number: 848 Registered: 02-2002 Posted on Monday, June 16, 2003 - 03:59 pm:    geez greg that explains the issue, no distributor! :o) mike w   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 436 Registered: 11-2002 Posted on Monday, June 16, 2003 - 04:11 pm:    No shit.