Question about 1999 Jeep Wrangler

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How do i find ou the firing sequencer for my1999 jeep wrangler? I have receintly changed my spark plugs and wires, now it just backfires?

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You will need a manual but sometimes they are marked on the intake manifold.

Posted on Sep 12, 2010

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Just changed the 2.5L engine in my 89 jeep wrangler and the engine turns over but won't start it just backfires like the timing is off, but thats not adjustable on this engine. Where did i go wrong?

Have you checked the firing order to make sure the plug wires are in correct order. Sometimes an engine will run but rough if 2 wires are mixed but it could be that there's more than 2 mixed up.

Sep 19, 2010 | 1989 Jeep Wrangler

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I went through water and stalled engine and have got new speark plugs, wires for them, new distributator cap and rotor. their is no water in oil or in the air intake. what could be probablem. it happened...

you may need to change your fuel filter sounds like you have water in the line. you can put some gas treatment or octane booster in the tank. but make sure that the new wires are in the right sequence for the firing order.

Jan 28, 2010 | 1995 Jeep Wrangler

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1989 jeep wrangler starts jumping and backfiring

Start with the basics...meaning check the spark plug wires and spark plugs. While under the hood, inspect all hoses for a vacuum leak(s). Then turn the ignition key on-off-on-off- on...leave in the on position and write down the number of flashes the check engine light indicates....2 flashes = #2....pause.....3 flashes = #3.
Let start from here. Are you able to perform engine repairs or diagnostics???

Jan 17, 2010 | 1989 Jeep Wrangler

1 Answer


Don't forget that the fan can blow water just about everywhere. Dry off your wires by removing them one by one and wiping them down with wd40 and then again with some silicone spray (I soak a paper towel or rag with both to do this). Also check the inside of the distributor cap and rotor. If they get wet inside it will cause arcing and mis-fire. Easy way to detect arcing is to run the engine in the dark and look carefully for a "halo" or actual sparks from ignition system.

Sep 11, 2009 | 1997 Jeep Wrangler

1 Answer

Backfire thru tailpipe

have you checked your spark plugs and distrubratercap make sure that all your plugs are calibrated to your mfg. spefications, it seems that you may have a little timing problem also

Jul 19, 2009 | 1993 Jeep Wrangler

2 Answers

1997 jeep wrangler 2.5l

first check the firing order plug wires, then check the timing , not sure of this but check the timing by lossening the distributor while enging is running and manually rotate the distrubutor to adjust timing, by ear w/o a timing light. maybe need to be retarded or advance a bit. check auto maintence manual for firing order.

Jul 11, 2009 | 1997 Jeep Wrangler

1 Answer

Motor won't start

You need 3 things for a start condition 1 spark 2 fuel 3 compression. If you have lost spark and have changed wires and coil then you should look at the crankshaft position sensor. This sensor tells the computer when to fire the coil and which plug to fire. Hope this helps. I will check back on the 14th.

May 14, 2009 | 1990 Jeep Wrangler

1 Answer

1988 jeep wrangle

Check your spark plugs. Without good spark plugs the ignition won't ignite. Just go look for Jeep spark plugs at like AutoZone and they are real cheap. To change them you will need a long socket wrench to twist them out and change each one.

Jan 30, 2009 | 1988 Jeep Wrangler

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