The distributor cap and rotor on the dodge Ram room wear items the occasionally require replacing. No only do these materials wear from continual use, but they are made of plastic the can end up being brittle and also fail through age. With the cap and rotor being such necessary parts of the ignition system, continual maintenance is encourage to keep your lamb truck to run 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 an essential components of the ignition system. Voltage from the ignition coil is sent directly to the spinning rotor inside of the distributor, which climate transfers the voltage to each contact suggest of the distributor cap. The electric charge is then sent out from the distributor cap to every of the engine"s spark plugs via spark plugs wires at the an exact time for combustion to occur. End time, the call points on the distributor cap and rotor deserve to wear, have extreme carbon buildup, or even break. Typically, these concerns will reason reduced engine performance; however, in major cases, a fail distributor lid or rotor will prevent your engine from to run at all. Maximize your engine"s effectiveness by installing new a distributor cap and also rotor.


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

Step 1 – eliminate airbox assembly

The distributor is situated underneath the airbox assembly and also behind the accelerator body. To gain accessibility to the distributor, the airbox assembly needs to it is in removed.

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

Step 2 – Label and remove spark plug wires

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

Figure 3. Distributor location.Located behind the accelerator body, the distributor cap has each spark plug wire attached to a designated position on the cap. Making use of the diagrams situated in number 4, label each spark plug wire v its linked cylinder number. Beginning with spark plug wire #1, follow the engine shooting order and label each successive spark plug cable by moving roughly the distributor in a clockwise motion. The staying wire in the facility of the distributor lid is the coil wire. Labeling the spark plug wires will certainly ensure they space reinstalled in their correct positions upon reassembly. Failure to correctly identify and install the spark plug wires can result in engine misfiring.
Figure 4. V8 and also V6 engine firing stimulate diagrams.With the spark plug wires labeled, remove all wires from the distributor cap. Wiggling and also slightly twisting the cable boots while pulling upwards will aid in removal.
Pro Tip

It is a good idea to map the spark plug wires from every cylinder ago to the distributor cap when labeling the wires.

Step 3 – replace distributor cap and rotor

Now that the spark plug wires and also coil cable are gotten rid of from the distribitor cap, the cap deserve to be eliminated 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 positions at the basic of the cap. After ~ loosening the fasteners, eliminate the distributor cap by just lifting the up. A little bit of maneuvering may be compelled to eliminate the lid from the engine bay together the to the right is a bit tight at the ago of the engine.After removing the cap, the rotor can be removed by simply offering it for sure tug upwards. Do not worry about marking its orientation as the distributor shaft has a small groove to permit the rotor to only be mounted one way.
Figure 5. New distributor cap and rotor.

Next, install the brand-new rotor in the distributor. As previously mentioned, over there is a groove in the distributor tower to ensure correct placing of the rotor.

Install the new distributor cap onto the distributor. Keep in mind that among the fastener mounts in the cap is square, if the various other is rounded to stop the lid from being erroneously installed. Additionally, the distributor lid should have a #1 stamped on it to suggest the place of the lid which should, relying on engine configuration, challenge towards the 7 or 9 o"clock position when installed (See number 5 because that the number "1" stamped into the cap). Be particular that the cap is appropriately seated in place on the distributor and tighten the fasteners. A misaligned cap will interfere with the transfer of electrical voltage indigenous the rotor to 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 to the old components to certain your have the correct parts. If either component is incorrect, your truck will likely not operation for absence of spark being delivered to the engine.

Step 4 – Reinstall spark plug wires and start truck

After the brand-new cap and rotor have been installed, reattach the spark plug wires and also coil cable to the distributor cap. The labeling of the wires completed in action 2 will come in handy and allow you to reinstall the wires in the correct place on the cap. Push down steady on each wire boot till an audible "click" is heard to ensure the wires are appropriately seated top top the cap.With all wires properly in location on the cap, begin the truck and also check the the engine is running properly. If the engine is misfiring or backfiring, shut the van off and also check that the spark plug wires are set up in their correct positions.
Figure 6. Begin the van to check engine operation.

Step 5 – Reinstall airbox assembly

If the truck checks out okay after a test start, continue with reinstalling the airbox assembly. Be sure the base of the airbox is seated properly over the throttle body prior to tightening the water tap clamp. Download the intake tube and rubber breather hose.

Figure 7. Airbox reinstalled and ready come drive.

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Pro Tip

If your truck is all set for a brand-new air filter, the is an ideal time to replace it as the airbox assembly has already been gotten rid of from the vehicle and also the filter have the right to be quickly and easily replaced.