The distributor cap and rotor top top the evade Ram are wear items the occasionally require replacing. No just do these components wear from regular use, yet they room made the plastic the can become brittle and fail through age. With the cap and rotor gift such crucial parts that the ignition system, continual maintenance is encourage to save your ram truck running at it"s best.

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This article uses to the Dodge lamb 1500 (1994-2001).

The distributor cap and also rotor ~ above the 2nd generation Dodge ram 1500 are crucial components of the ignition system. Voltage from the ignition coil is sent directly to the turn rotor within of the distributor, which then transfers the voltage to every contact allude of the distributor cap. The electrical charge is then sent out from the distributor lid to every of the engine"s spark plugs via spark plugs wires in ~ the an accurate time for combustion to occur. End time, the call points top top the distributor cap and also rotor have the right to wear, have excessive carbon buildup, or also break. Typically, these worries will cause reduced engine performance; however, in major cases, a failure distributor lid or rotor will stop your engine from running at all. Maximize your engine"s performance by installing brand-new a distributor cap and also rotor.


Materials NeededFlat head screwdriverPhillips screwdriver, 7mm wrench, or 7mm socket v 1/4" ratchet and also extensionPainter"s tape and pen/marker

Step 1 – eliminate airbox assembly

The distributor is located underneath the airbox assembly and behind the throttle body. To gain accessibility to the distributor, the airbox assembly demands to it is in removed.

First, remove the wait intake pipe off of the airbox. Applying gentle force, on slide the pipe away from the airbox and also position it out of the way.Remove the rubber breather hose. Depending upon engine model, this hose may be located on the left or best side that the airbox. This tube merely slides on and also off of the airbox nipple.On the underside the the airbox, loosen the hose clamp securing the airbox come the throttle body.With every fittings disconnected, lift increase on the airbox assembly and also remove the from the engine bay.
Figure 1. Airbox remove points.
Figure 2. Loosening hose clamp securing airbox to throttle body.

Step 2 – Label and remove spark plug wires

With the airbox assembly removed, the distributor is currently accessible.

Figure 3. Distributor location.Located behind the throttle body, the distributor cap has actually each spark plug wire attached come a designated place on the cap. Utilizing the diagrams situated in number 4, label each spark plug wire through its linked cylinder number. Beginning with spark plug cable #1, follow the engine shoot order and label each succeeding spark plug wire by moving approximately the distributor in a clockwise motion. The continuing to be wire in the center of the distributor cap is the coil wire. Labeling the spark plug wires will ensure they room reinstalled in your correct location upon reassembly. Fail to effectively identify and also install the spark plug wires can an outcome in engine misfiring.
Figure 4. V8 and V6 engine firing order diagrams.With the spark plug wires labeled, eliminate all wires indigenous the distributor cap. Wiggling and also slightly twisting the cable boots while pulling upwards will assist in removal.
Pro Tip

It is a an excellent idea to map the spark plug wires from every cylinder back to the distributor cap once labeling the wires.

Step 3 – replace distributor cap and rotor

Now the the spark plug wires and coil cable are eliminated from the distribitor cap, the cap have the right to be removed from the distributor.

Using a a 7mm wrench, socket & ratchet, or Phillips screwdriver, loosen the 2 distributor cap fasteners. The fasteners are located at the 3 & 9 o"clock location at the base of the cap. ~ loosening the fasteners, eliminate the distributor lid by merely lifting that up. A bit of maneuvering may be forced to remove the cap from the engine bay together the right is a little bit tight at the earlier of the engine.After removed the cap, the rotor can be eliminated by simply giving it firm tug upwards. Perform not worry around marking that is orientation as the distributor shaft has actually a tiny groove to allow the rotor to just be mounted one way.
Figure 5. Brand-new distributor cap and rotor.

Next, download the new rotor in the distributor. As formerly mentioned, over there is a groove in the distributor pillar to ensure correct placing of the rotor.

Install the new distributor lid onto the distributor. Note that among the fastener mounts in the lid is square, when the other is rounded to stop the cap from being wrongly installed. Additionally, the distributor cap should have actually a #1 stamped on it to indicate the position of the lid which should, depending upon engine configuration, face towards the 7 or 9 o"clock place when mounted (See number 5 for the number "1" stamped right into the cap). Be specific that the lid is effectively seated in ar on the distributor and also tighten the fasteners. A misaligned cap will interfere with the transfer of electric voltage indigenous the rotor come the distributor cap and also prevent proper combustion native occurring.

Pro Tip

It is always a good idea to compare the new distributor cap and also rotor come the old materials to ensure your have the correct parts. If one of two people component is incorrect, her truck will likely not operation for absence of spark being delivered to the engine.

Step 4 – Reinstall spark plug wires and also start truck

After the brand-new cap and rotor have been installed, reattach the spark plug wires and also coil wire to the distributor cap. The labeling that the wires completed in step 2 will certainly come in comfortable and enable you come reinstall the wires in the correct place on the cap. Press down steady on each cable boot till an audible "click" is heard come ensure the wires are effectively seated ~ above the cap.With every wires effectively in location on the cap, start the truck and also check the the engine is to run properly. If the engine is misfiring or backfiring, shut the truck off and check the the spark plug wires are set up in their correct positions.
Figure 6. Begin the truck to check engine operation.

Step 5 – Reinstall airbox assembly

If the truck checks out it s okay after a check start, proceed with reinstalling the airbox assembly. Be sure the base of the airbox is seated appropriately over the throttle body before tightening the hose clamp. Install the entry tube and rubber breather hose.

Figure 7. Airbox reinstalled and ready come drive.

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Pro Tip

If your truck is ready for a brand-new air filter, it is suitable time to replace it together the airbox assembly has already been eliminated from the vehicle and the filter have the right to be quickly and easily replaced.