How to check and replace the spark plug wires and Distributor Cap on Mercury Grand Marquis?

Inspect the wires visually while the engine is running in a dark, well-ventilated garage to maintain spark plug wires. Watch out for arcs or sparks that indicate wear and tear on them. One cylinder at a time, examine the wires starting with number one and mark them accordingly. A wire can be disconnected without removing the wire itself by using a removal tool or twisting and pulling the rubber boot. Ensuring a tight fit, push the wire and boot onto the spark plug. The metal connector inside the boot should be crimped when required. Clean the wire with a rag; check for burns, cracks or damage and inspect for corrosion at distributor end and snug fitting. Replace damaged wires with those made for your engine model and replace one at a time so that you do not disturb firing order. Replace 1991 and earlier models' distributor cap and rotor if they are worn out, damaged or cracked or have carbon tracks or worn terminals.

Genuine Mercury Grand Marquis Distributor Cap

Ignition Distributor Cap

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6 Distributor Caps found

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Mercury Grand Marquis Housing Assy - Distributor Terminal
Part Number: E6AZ-12106-A
$17.56 MSRP: $28.00
You Save: $10.44 (38%)
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Product Specifications
- Other Name: Cap, Distributor Cap
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1980-1991 Mercury Grand Marquis | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD
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Mercury Grand Marquis Housing Assy - Distributor Terminal
Part Number: E5DZ-12106-A
$21.43 MSRP: $34.18
You Save: $12.75 (38%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cap, Distributor Cap
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1980-1989 Mercury Grand Marquis | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD
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Mercury Grand Marquis Housing Assy - Distributor Terminal
Part Number: E9FZ-12106-A
$13.73 MSRP: $25.64
You Save: $11.91 (47%)
ADD TO CART
Product Specifications
- Other Name: Cap, Distributor Assembly Cap, Distributor Cap
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1980-1989 Mercury Grand Marquis | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD
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Mercury Grand Marquis Housing Assy - Distributor Terminal
Part Number: E5BZ-12106-A
$0.00
Product Specifications
- Other Name: Cap, Distributor Cap
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1980-1989 Mercury Grand Marquis | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD
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Mercury Grand Marquis DSTRBTR CP
Part Number: D9AZ12106A
Product Specifications
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1980-1989 Mercury Grand Marquis | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD
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Mercury Grand Marquis Housing Assembly Distributor
Part Number: E7GZ12106A
Product Specifications
- Other Name: Housing Assy - Distributor Terminal; Cap
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1980-1989 Mercury Grand Marquis | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD

Mercury Grand Marquis Distributor Cap

Mercury Grand Marquis vehicles use this Distributor Cap to shield internal distributor parts and to transfer currents from ignition coils to spark plug wires. It has posts for each engine cylinder and the different tweaks like the dual spark plug per cylinder. The rotor, secured to the camshaft, sends electrical current, to the spark plugs, in the required firing sequence. Water exposure and thus have an effect on engine failure and regular maintenance is important for efficiency. Distributor caps are fairly cheap and simple to replace and several models employ caps as a security mechanism. Finally, it can be stated that Distributor Cap is yet another crucial component of the ignition system in Mercury Grand Marquis automobiles, which directly influence their performance.

We provide a wide range of Mercury Grand Marquis Distributor Cap at the best prices possible. If you need Mercury Grand Marquis Distributor Cap, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Mercury Grand Marquis Distributor Cap Parts Questions & Experts Answers

Housing Assy - Distributor Terminal
E6AZ-12106-A
Q: How to check and replace the spark plug wires and Distributor Cap on Mercury Grand Marquis?
A: Inspect the wires visually while the engine is running in a dark, well-ventilated garage to maintain Spark Plug wires. Watch out for arcs or sparks that indicate wear and tear on them. One cylinder at a time, examine the wires starting with number one and mark them accordingly. A wire can be disconnected without removing the wire itself by using a removal tool or twisting and pulling the rubber boot. Ensuring a tight fit, push the wire and boot onto the spark plug. The metal connector inside the boot should be crimped when required. Clean the wire with a rag; check for burns, cracks or damage and inspect for corrosion at distributor end and snug fitting. Replace damaged wires with those made for your engine model and replace one at a time so that you do not disturb firing order. Replace 1991 and earlier models' distributor cap and rotor if they are worn out, damaged or cracked or have carbon tracks or worn terminals.