kblast523
New Member
- Joined
- Apr 23, 2021
- Messages
- 13
- Reaction score
- 1
- Points
- 3
- Location
- Howardwick, Tx
- Vehicle Year
- 1996
- Make / Model
- Mazda B2300 SE
- Transmission
- Manual
1996 Mazda B2300 here. Probably 250k+ miles (odo not working since 2009), replaced: plugs, wires, MAF, TBS, filters, fuel pump, regulator, up and down stream O2 sensors, cat converter, TPS, PCV and hoses. Replaced upper intake gasket, thermostat (195 degree), water pump, timing belt, serp and all idlers as well as power steering pump. Replaced fuel pump and regulator last week due to codes and new pump and regulator made no change to measured fuel pressure of 28 lbs at idle. Start vehicle hot or cold, will not idle. Engine speed fluctuates up to 2000 then when idles down dies. Runs with throttle above 1000 rpm. It launches ok from stop, but has to be run at 2000 rpm or more to keep from slowing down, if it's put in 4th below 55 to 60 mph, slows down. Top speed 65-70 mph in 4th does nothing unless going down hill with tailwind and tailgate down in 5th....not using oil, no smoke, not engine knocks, no sludge. Three ASE certified mechanics stumped, as well as I. HELP!