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New Member
- Joined
- Mar 21, 2010
- Messages
- 1
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 2001
- Make / Model
- Mazda
- Transmission
- Automatic
New guy, need expert advice!
My 2001 Mazda B3000 will crank strongly but not start. Ran great all day, filled it with gas, sprayed off the road salt at car wash, and parked it. Next day, no start. Here’s what I know:
Is there anything obvious that I’m missing or can try before deciding it must be the computer? Been wrangling this slowly since December, and any assistance will be greatly appreciated.
My 2001 Mazda B3000 will crank strongly but not start. Ran great all day, filled it with gas, sprayed off the road salt at car wash, and parked it. Next day, no start. Here’s what I know:
- Can hear fuel pump running at start, fuel pressure at rail about 55psi. Dumped isopropyl in full gas tank in case of water, replaced fuel filter.
- No spark, even with new plugs, wires, and coil pack (all tested with resistance in spec)
- Crankshaft position sensor tested fine, replaced it anyway, no change
- Cam position sensor tests okay (resistance and signal in spec)
- Wire harness between these sensors and PCM showing continuity
- PCM grounds all good
- Wire harness between coil and ECM showing continuity
- 12 volts to coil pack, but no circuit completion between hot and the 3 primary coil connectors when cranking engine (checked with test light)
- When connecting OBD2 code reader, no codes (I may have cleared them when I disconnected harness to PCM before testing) but can see some sensor data (temp, RPM, air flow).
- Passive anti-theft light goes out when cranking.
- Pulled PCM, looks clean, no burns (but a little moisture at pin connector)
Is there anything obvious that I’m missing or can try before deciding it must be the computer? Been wrangling this slowly since December, and any assistance will be greatly appreciated.
