This page lists 16 ignition parts for the 1990 Morgan 4/4, across 1 part type, covering both the 1.6L L4 DOHC and the 1.6L L4 SOHC. Every part shows its brand, manufacturer part number and fitment notes.
On the 1990 Morgan 4/4, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. Every listed part is a Spark Plug.
The 1990 Morgan 4/4 was sold with both the 1.6L L4 DOHC and the 1.6L L4 SOHC. All 16 parts on this page fit every engine.
The most listed brands for 1990 Morgan 4/4 ignition parts are ACDELCO (4 parts), CHAMPION (4 parts) and NGK (4 parts), plus 3 more brands. Quality grades include Copper / Nickel, Iridium and Platinum.
4 parts on this 1990 Morgan 4/4 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including ACDELCO 41602 (Spark Plug) and AUTOLITE XP3922 (Spark Plug). Click any part number to see every vehicle that part fits.
Spark Plug
Summary: Notes include pre-set gaps of 0.025", 0.028", 0.032", 0.034", 0.035", 0.036", 0.039", 0.040" and 0.041". Both engines share the same gaps. Replacement brands in this table include ACDELCO, CHAMPION and NGK.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: all 1990 4/4 engines | 41602 | 🇺🇸 US 🇨🇦 CA | ProfessionalConventional | View on Amazon |
| ACDELCO Fits: all 1990 4/4 engines | FR1LS | 🇺🇸 US 🇨🇦 CA | Package .025 Gap | View on Amazon |
| BOSCH Fits: all 1990 4/4 engines | 7924 | 🇺🇸 US | Nickel | View on Amazon |
| CHAMPION Fits: all 1990 4/4 engines | 340 | 🇺🇸 US | Copper PlusPre-Set Gap: 0.035" | View on Amazon |
| NGK Fits: all 1990 4/4 engines | 3735 | 🇺🇸 US | V-PowerPre-Set Gap: 0.036" | View on Amazon |
| NGK Fits: all 1990 4/4 engines | 2330 | 🇺🇸 US | StandardPre-Set Gap: 0.036" | View on Amazon |
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: all 1990 4/4 engines | 41829 | 🇺🇸 US 🇨🇦 CA | ProfessionalDouble Platinum | View on Amazon |
| CHAMPION Fits: all 1990 4/4 engines | 7545 | 🇺🇸 US | Double Platinum PowerPre-Set Gap: 0.039" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOLITE Popular Fits: all 1990 4/4 engines | XP3922 | 🇺🇸 US | Iridium XPPre-Set Gap: 0.040" | View on Amazon |
| AUTOLITE Fits: all 1990 4/4 engines | AI3922 | 🇺🇸 US | Iridium Ultra | View on Amazon |
| CHAMPION Fits: all 1990 4/4 engines | 9770 | 🇺🇸 US | IridiumPre-Set Gap: 0.034" | View on Amazon |
| NGK Fits: all 1990 4/4 engines | 5689 | 🇺🇸 US | Iridium IXPre-Set Gap: 0.032" | View on Amazon |
| SKP Fits: all 1990 4/4 engines | SP1011 | 🇺🇸 US | Tapered Ground Electrode with Platinum Chip | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: all 1990 4/4 engines | 19 | 🇺🇸 US 🇨🇦 CA | ProfessionalRapidfire | View on Amazon |
| NGK Popular Fits: all 1990 4/4 engines | 7088 | 🇺🇸 US | G-PowerPre-Set Gap: 0.040" | View on Amazon |
| CHAMPION Fits: all 1990 4/4 engines | 3340 | 🇺🇸 US | Platinum PowerPre-Set Gap: 0.04" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
16 Spark Plug parts for the 1990 Morgan 4/4 come from 6 brands — ACDELCO, CHAMPION, NGK and 3 other brands. The "Popular" part is ACDELCO 41602. Every part fits both the 1.6L L4 DOHC and the 1.6L L4 SOHC.
The Copper / Nickel section lists 6 options from ACDELCO, NGK, BOSCH and 1 other brand — grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. ACDELCO 41602 is listed in this group.
The Double Platinum (lasts up to 3x longer than Copper / Nickel) section lists 2 options from ACDELCO and CHAMPION — grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. ACDELCO 41829 is listed in this group.
In the Iridium (lasts up to 4x longer than Copper / Nickel) grade, AUTOLITE, CHAMPION, NGK and 1 other brand supply 5 parts: grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is AUTOLITE XP3922.
The Platinum (lasts up to 2x longer than Copper / Nickel) section lists 3 options from ACDELCO, NGK and CHAMPION — grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. ACDELCO 19 is listed in this group.
Buying Ignition Parts for a 1990 Morgan 4/4
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- You do not need to pick an engine: every ignition part on this page fits both the 1.6L L4 DOHC and the 1.6L L4 SOHC.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Spark Plug .
Frequently Asked Questions
How many ignition parts fit the 1990 Morgan 4/4?
Our catalog currently lists 16 ignition parts for the 1990 Morgan 4/4 across 1 subcategory and 6 brands, covering both the 1.6L L4 DOHC and the 1.6L L4 SOHC. Each part is matched to the engine(s) it fits.
Do ignition parts differ between 1990 Morgan 4/4 engines?
No. On this page every ignition part fits both the 1.6L L4 DOHC and the 1.6L L4 SOHC. You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of ignition problems on a 1990 Morgan 4/4?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 1990 Morgan 4/4?
Notes on this page include pre-set gaps of 0.025", 0.028", 0.032", 0.034", 0.035", 0.036", 0.039", 0.040" and 0.041". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1990 Morgan 4/4 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1990 Morgan 4/4?
Every part on this page already fits both the 1.6L L4 DOHC and the 1.6L L4 SOHC. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1990 Morgan 4/4
Ignition Parts for Other Morgan 4/4 Years
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