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Just put new wires cap rotor and plugs now runs really bad?

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Sometimes the rotor button contact slips off the cap when you put it on. Check that and also if you have gotten anything inside the cap causing a cross fire. Most importantly!!!! Did you happen to cross any wires? Thought I had them on right but had 2 on wrong cap contact..lol.. ran but rough. Also just thought of the plug gap. Hope this helps without me looking at it. Good Luck.

Posted on Apr 20, 2015

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I'm getting an orange spark on my 1983 ford ranger, 2.3 4 cylinder. Replaced the coil, the distributor cap looks brand new. This truck is excessively flooding and when it does crank, it won't...


yes it could,, if you don't have the correct spark,, the firing would be weaker also, check the wires themselves to the plugs, and also the rotor , just because the cap looks brand new doesn't mean that its not arching inside the cap,, allowing the contact to get a reduced spark, if you replaced the coil, then its after that in the electrical circuit,, which brings you back to the cap, rotor, and wires. normally 3 wires won't go bad all at once unless there is a heat problem where the wires are routed, so I would just replace the cap and rotor, and see how it runs after that .

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There are two screws to hold the cap on, remove them, and pull the cap off with the wires still on it. Then you will see the rotor on the post under the cap, this pull straight up and off. The new one slides right down in place. Then take one plug wire off at a time and put it on the same position on the new cap.

Doesn't really matter where number one wire goes as long as the firing order is in the correct order. I find it easier just to pull and put one plug wire on at a time.

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there should be 2 clips on from the rotor housing to the cap, pull the clips off and lift the cap, you will want to change the rotor inside as well. do not remove the spark plug wires from the old cap yet...replace the rotor, it will only go on one way, and put new cap on, it too should only go one way. now, one at a time, pull the plug wires and put them on the new cap that is mounted. this will ensure that you have them in the right order.

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1 Answer

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Fouled spark plug? Bad wire? Rotor / cap new? Check those things out, wear a thick rubber glove, take the wire off the non working plug, put a screwdriver next to the wire (while car is running) and see if a spark is made. If it is, your plug is bad. If no spark, replace wires. Still no spark? Change your rotor and cap. Still no spark? Ignition module. Following those steps will save you some green.

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My 2002 dodge ram van cranks/ won't fire


The coil is inside the distributor cap. It is a flat round plastic plate the cap pushes downn on when you put it on, with wires going to it. Disconnect the wire connector, remove the distributor cap, remove the rotor, pull up on the wires till the coil/plate pops off the distributor housing. Replace with new coil, reverse procedure to assemble it all.
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