AboutMp2 Expertise I prefer to answer questions relating to the Miata since this has been my area of specific
expertise since 1991. I can answer questions relating to the other Mazda models however
some limitation of expertise may reduce my accuracy.
Experience Mazda technician since 1987, shop owner and specialty are regarding the Miata since 1991 covering mechanical, electrical, trim and body. Specializing specifically in drivability concerns.GKHS 1985, BVC 1987, MNA 1989, ASE Master Technician Mechanical 1995, ASE Master Body/Paint/Collision 1996
Education/Credentials GKHS 1985, BVC 1987, MNA 1989, ASE Master Technician Mechanical 1995, ASE Master Body/Paint/Collision 1996
Question Occasionally when starting our 2001 miata, it turns over fine, then slowly starts
to fire, then runs fine without any hesitation at any speed. There isn't any smoke
just slow to fire. Can it be the fuel pump not turning on?
Answer The issue is fuel pressure or delivery related under most situations. 1999-2005 models have the fuel pressure regulator mounted to the pump assembly in the tank. Some have experienced regulator failure issues. A replacement part Mazda BP4W-13-280 is available and may resolve your issue. In some cases the fuel pump has been to blame. Pressure stability testing is the only way to determine a flow or pressure issue.
