Car died, cranks but no start

Discussion in 'Mazdaspeed 3 General Discussion' started by Rgurleyjr, Oct 16, 2020 at 9:50 PM.

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  1. Rgurleyjr

    Rgurleyjr Greenie Member

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    2008 Mazdaspeed 3. I got 3 gallons of gas, turned to get back on the highway, then engine stalled. When first trying to restart, for a split second it sounds like it wants to start, but doesn't and then just turns over and over.

    Only DTCs are p0140, p0441, and p0446. Have had evap problems forever, putting gas in the tank takes forever ever since I bought it. Never caused drivability problems. Catless downpipe causing the p0140 I think.

    I've had zero mechanical problems with this car, until today. Popped hood and didnt see anything obvious. I'm great working on cars but been a long time diagnosing a cranks but no start with no dtcs to research. I've heard of the possible vvt actuator, but been a while since I've looked into it. I'm getting the car towed tomorrow. Any idea where to start? In tank fuel pump?
     
    Rgurleyjr, via a mobile device, Oct 16, 2020 at 9:50 PM
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  2. Easter Bunny

    Easter Bunny Professional Engineer Platinum Member

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    Check your fuel pressure. Could be one of the grounds that keeps the hpfp running
     
    Easter Bunny, via a mobile device, Oct 16, 2020 at 10:14 PM
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  3. L337TurboZ

    L337TurboZ Silver Member

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    You said you have had evap problems for a long time. You're saying that it takes a while to pump gas into the tank. That tells me you have 3 possible issues.

    A clogged charcoal canister or pinched evap line
    A stuck closed evap vent solenoid
    A faulty fuel tank pressure sensor.

    Remember that on Key Off the ECU will check to see a difference in fuel tank pressure. As you fill the tank and the fuel level rises the pressure changes. The ECU then tells the vent solenoid to open (if the pressure increases past X threshold) and it makes room for the fuel to come in. It also monitors tank pressure for the purge solenoid to be commanded for vapor circulation into the engine.

    P0446 is for Evap vent system performance. The ECU is seeing there is a fault venting the pressure from the tank.

    If you have access to compressed air and a blow gun, take the canister down and try blowing through it. It should be a fairly even amount of airflow through the canister. A smoke test would be better if you have access to that kind of equipment.

    You can test the vent solenoid by removing it, and using jumper wires to turn it on and off or just use a Power Probe on the vent solenoid. It could be dirty and partially clogged to where it will vent but not all the way. 99 percent of the time they just fail and wont cycle.

    I'm not sure if that will help your no start. I've seen purge solenoids fail wide open that causes rough running and lean codes but never one that actually pulled fuel from the tank.
     
    L337TurboZ, via a mobile device, Oct 17, 2020 at 10:43 AM
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  4. Rgurleyjr

    Rgurleyjr Greenie Member

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    I looked into removing the canister a while back, but saw it was a big job. Shortly after, someone hit me and lied to the police, so I gave up trying to get it fixed as the car lost half its value from the accident. It's had the same fuel acceptance problem for a year, but never caused a no start or hesitation and so I dealt with it.

    I don't have an access port, so I couldn't chk fuel pressure. I got it home, and it had power going to the hpfp. I unplugged the evap sol hose from engine side per the manual, no change. Looked around, saw nothing out of ordinary. Tried starting a few times, same thing. I unplugged egr valve. Tried starting once, no start but then tried a second time, car started. It now starts and runs completely normal.

    My house is on a hill and once I take it for a drive, I wont be able to get it back in the garage if it dies again. I'm nervous because I'm not even sure unplugging the egr did it, at this point I don't know what to do. Hard to diagnose a no start when its now running.
     
    Rgurleyjr, via a mobile device, Oct 17, 2020 at 3:06 PM
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  5. Rgurleyjr

    Rgurleyjr Greenie Member

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    Update. Started car again, ran but stalled. Would not restart. Checked codes and now got p0113 and p0091. Not sure about the iat sensor but the p0091 points to fuel pressure.

    Unplugged battery, car restarted after a few seconds. I did put autotech internals in my original hpfp housing. I'll have to look at the manual to see where to start, but mainly in tank fuel pump, hpfp, or rail sensor? Been a while since I researched the fuel system. I don't know if I can get a fuel pressure gauge to chk the hpfp.
     
    Rgurleyjr, via a mobile device, Oct 17, 2020 at 3:42 PM
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