silentuss
Greenie N00B Member
Year/Make/Model: 2010 Mazda 3 MPS (Speed 3)
Mileage: 235000 km / 146000 miles
Location/Alitutude: Middle Europe
Concern: Cranks but doesnt start
DTC's: none, but before: P0340, U0401:68-08, U2023-FF, U0401:00-68
Modifications: CS HPFP, CS E85 Rebuild kit, CS Injector Seals, Test Pipe, EGR Delete, Dual OCT
ECU/Tuning Software: VersaTuner
Tuner: VersaTune Base 98 EU Map
Is the concern intermittent? No
Can you duplicate the concern? Yes
Recent Repairs: 6 months ago Rebuilt and Upgraded HPFP, Cleaned Injectors with CS Seals
Hello everyone,
I'm having a problem with my BL MPS (Speed 3).
I was driving around 90 km/h (55 mp/h) when I noticed a section of the road had been milled down for reconstruction (a drop of about 5 cm / 2 inches). I started braking, but as I hit the bump, the car suddenly died.
It was a dangerous situation since I was mid-turn and lost both power steering and brakes—though I didn’t realize it at first. I managed to stop safely, but the car hasn’t started since.
It just cranks endlessly without turning on, and the brake pedal is stuck hard at the top. (Loss of vacuum?)
That being said, the bump wasn't even that big and it was pretty smooth. I have hit much worse before and the car ran perfect before that.
Error codes I got right after it happened:
P0340:00-AC Camshaft position sensor (PCM)
U0401:68-08 Invalid Data Received (Instrument cluster)
U2023-FF (Power Steering)
U0401:00-68 Invalid Data Received (ABS)
After i cleaned the codes they never reappeared, but the car still cranks but doesn't start. I don't get how there can be no codes.
I tried:
• Cleaning the cam sensor
• Disconnected the MAF and tried starting - didn't help
• Checked and reconnected several connectors, grounds... (HPFP ground seems OK)
• Checked interior and exterior fuses and they all seem good
• Cleared the fault codes (they haven’t reappeared)
• Adjusted and cleaned crank sensor
• Checked for spark - Spark is "uneven" and it only makes spark once a cranking cycle
• Fuel pressure from live data is at approx. 70 psi (ITFP pressure) and doesn't rise when cranking (=HPFP problem?)
Unfortunately, the car still won’t start after all of this.
Does anyone have advice on what might be causing this or where I should even begin? I'm running out of ideas. Any tips are greatly appreciated!
Mileage: 235000 km / 146000 miles
Location/Alitutude: Middle Europe
Concern: Cranks but doesnt start
DTC's: none, but before: P0340, U0401:68-08, U2023-FF, U0401:00-68
Modifications: CS HPFP, CS E85 Rebuild kit, CS Injector Seals, Test Pipe, EGR Delete, Dual OCT
ECU/Tuning Software: VersaTuner
Tuner: VersaTune Base 98 EU Map
Is the concern intermittent? No
Can you duplicate the concern? Yes
Recent Repairs: 6 months ago Rebuilt and Upgraded HPFP, Cleaned Injectors with CS Seals
Hello everyone,
I'm having a problem with my BL MPS (Speed 3).
I was driving around 90 km/h (55 mp/h) when I noticed a section of the road had been milled down for reconstruction (a drop of about 5 cm / 2 inches). I started braking, but as I hit the bump, the car suddenly died.
It was a dangerous situation since I was mid-turn and lost both power steering and brakes—though I didn’t realize it at first. I managed to stop safely, but the car hasn’t started since.
It just cranks endlessly without turning on, and the brake pedal is stuck hard at the top. (Loss of vacuum?)
That being said, the bump wasn't even that big and it was pretty smooth. I have hit much worse before and the car ran perfect before that.
Error codes I got right after it happened:
P0340:00-AC Camshaft position sensor (PCM)
U0401:68-08 Invalid Data Received (Instrument cluster)
U2023-FF (Power Steering)
U0401:00-68 Invalid Data Received (ABS)
After i cleaned the codes they never reappeared, but the car still cranks but doesn't start. I don't get how there can be no codes.
I tried:
• Cleaning the cam sensor
• Disconnected the MAF and tried starting - didn't help
• Checked and reconnected several connectors, grounds... (HPFP ground seems OK)
• Checked interior and exterior fuses and they all seem good
• Cleared the fault codes (they haven’t reappeared)
• Adjusted and cleaned crank sensor
• Checked for spark - Spark is "uneven" and it only makes spark once a cranking cycle
• Fuel pressure from live data is at approx. 70 psi (ITFP pressure) and doesn't rise when cranking (=HPFP problem?)
Unfortunately, the car still won’t start after all of this.
Does anyone have advice on what might be causing this or where I should even begin? I'm running out of ideas. Any tips are greatly appreciated!
Last edited: