● Condition:New

 

Set of 8 Ford Motorcraft ZD-29 Glow Plugs MC3Z-12A342-E For 1988-1994 7.3L IDI

Keep your classic 7.3L IDI Diesel starting reliably with the Ford Motorcraft ZD-29 Glow Plug (MC3Z-12A342-E). Designed specifically for 1988–1994 Ford F-Series trucks and E-Series vans equipped with the 7.3L IDI engine, these OEM glow plugs deliver the factory-correct fit, performance, and durability your diesel deserves.

Over time, glow plugs can fail due to overheating, electrical issues, or fuel system problems, leading to hard starts, excessive cranking, rough idling, and increased emissions during cold starts. Replacing your glow plugs at the first sign of trouble can prevent more serious engine wear and improve cold weather performance.

Common Causes of Glow Plug Failure:
- Excessive voltage or overheating, causing the casing to swell or split
- Incorrect testing procedure (applying 12V to a 6V glow plug)
- Improper engine timing or faulty injector spray pattern
- Continuous cycling of glow plugs due to control system faults

Signs You Need New Glow Plugs:
- Hard starting or no start
- Excessive cranking before start
- Rough idle after startup
- Excessive smoke during cold starts

Features:
Set of 8 Genuine Ford Motorcraft OEM glow plugs
Factory-correct design for 7.3L IDI Diesel engines
Reliable cold-start performance
Long-lasting construction to resist swelling and failure

Replaces OEM Part Numbers: F2TZ-12A342-A, ZD-9
Aftermarket Interchange: 184, 32G, 5614220, GP105, 25005, DRX00084
UPC: 031508786059

Vehicle Fitment:
1988–1994 Ford F-250 / F-350 / F-Super Duty 7.3L IDI Diesel
1988–1994 Ford E-Series Vans 7.3L IDI Diesel

Installation Notes:
- Use proper testing procedures for 6V glow plugs
- Check engine timing and injector spray pattern before installation
- Avoid applying direct 12V to glow plugs