Standard Ignition PR78 fuel injection pressure regulator for the 1990-1991 Mazda 323 4-cylinder 1.8L, the 1990-1994 323 4-cylinder 1.6L and other vehicles controls the fuel pressure that reaches the injectors. It is tuned to Mazda engine requirements, and steady fuel delivery helps acceleration and throttle response.
- Operating pressure of 42 PSI for consistent, precise fuel delivery
- Leak-proof seals and thermal resistance for varied driving conditions
- Tested through 200+ hours of vibration, 1000+ hours of extreme heat and cold operation, and on-vehicle testing
- Corrosion-resistant, high-durability materials that resist wear and deformation
Quick facts
- Part: Standard Ignition PR78 fuel injection pressure regulator
- Fits: the 1990-1991 Mazda 323 4-cylinder 1.8L, the 1990-1994 323 4-cylinder 1.6L and other vehicles
- Condition: New
A failing regulator can show up as hard starting, a rough idle or poor fuel economy. A weak fuel pump, a clogged fuel filter or a leaking injector can be behind those signs too, so find the cause before you buy. The engine needs just one regulator, and this listing is one.
Fits
It also fits the 1990-1994 Mazda Protege 4-cylinder 1.8L and the 1992-1993 Mazda MX-3 4-cylinder 1.6L.
Specifications
Fit and size
- Quantity per vehicle: 1
- Operating pressure: 42 PSI
- Nipple orientation: Angled
- System type: Gas
Build and materials
- Condition: New
- Country of origin: Mexico
In the box
One fuel injection pressure regulator with an O-ring and a caution sheet.
Interchange: 2-19525 · 800-190
21890 · PRDL190 · BP0113280
This part cross-references / interchanges with the following part numbers:
21890, PRDL190, 2-19525, BP0113280, 800-190, PR78
Frequently Asked Questions
Is the Standard Ignition fuel injection pressure regulator right for the 1990-1994 Mazda Protege 4-cylinder 1.8L?
Yes. Standard Ignition PR78 fits the 1990-1994 Mazda Protege 4-cylinder 1.8L.
Does the PR78 fuel injection pressure regulator come with an O-ring?
Yes. This listing includes one fuel injection pressure regulator, an O-ring and a caution sheet.
What operating pressure does this fuel injection pressure regulator run at?
Standard Ignition PR78 is rated for 42 PSI operating pressure and has an angled nipple orientation.
Can a failing fuel injection pressure regulator cause hard starting?
It can be one cause, along with a rough idle or poor fuel economy. Testing fuel pressure involves the fuel system, so a shop is the right place for it.
What testing did the Standard Ignition PR78 go through?
It went through 200+ hours of vibration testing, 1000+ hours of extreme heat and cold operational testing and on-vehicle testing.
