Having issues with startup

Discussion in 'Mazdaspeed 3 Troubleshooting' started by Rogan22, Jul 14, 2021.

Watchers:
6 users.
  1. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0
    Hello all, I finally dipped into the world of mods. My car is at 104k so I figured it was time to clean the intake valves and change injectors. While I was doing that I also put on

    -Cobb AP/ working on Freektune from Justin
    -corksport hpfp internals
    -new injectors with corksport seals
    -Damond egr delete
    -Damond pcv plate and pcv valve
    -JBR 3.5 full path intake
    -CPE quickspool catted dp
    -Mishimoto fmic with CX racing piping kit

    after doing all that the car wants to start but won’t keep running. I’ve changed spark plugs as well and made sure they are at .026. I have a new fuel prv on the way hoping that is it but I could really use some help
    Thanks in advance
     

    Attached Files:

    Rogan22, via an iPhone, Jul 14, 2021
    #1
  2. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

    Joined:
    Feb 11, 2016
    Posts:
    3,233
    Trophy Points:
    113
    Location:
    Earth
    Ratings:
    +3,532 / -19
    Do you have a tune that is adjusted for the bigger intake?
     
    Easter Bunny, via a mobile device, Jul 14, 2021
    #2
    • Like Like x 3
  3. Awafrican

    Awafrican Moderator Gold Member

    Joined:
    Feb 11, 2016
    Posts:
    3,586
    Trophy Points:
    113
    Location:
    Canada
    Ratings:
    +2,850 / -11
    Are you getting any error codes? Check that ground near the hpfp and all your electrical connections. Also ensure your MAF is connected and isn't installed backwards. Another common issue is forgetting to plug the throttle body back in
     
    Awafrican, via a mobile device, Jul 14, 2021
    #3
  4. VashEXE

    VashEXE ButtStallion Tuned Greenie Member

    Joined:
    Feb 25, 2016
    Posts:
    436
    Trophy Points:
    93
    Location:
    a
    Ratings:
    +731 / -3
    You're definitely not going to start/run if you haven't adjusted your mafcal for this intake though. That's the first thing you should verify.
     
    • Like Like x 1
  5. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0
    I have my first MAP from Justin at Freektune, I wouldn’t want to mess with anything else knowing their isn’t any OTS tunes for my configuration of parts. I’m not getting any codes sadly would make this easier hah.. I have checked all grounds and made sure all plugs were plugged in including throttle body. Also rechecked all hoses to make sure their are no leaks. During start up the hpfp fuel pressure only hits just over 1000psi which is making me think it’s the PRV not allowing the proper pressure. Thanks for the input so for
     
    Rogan22, via an iPhone, Jul 14, 2021
    #5
  6. VashEXE

    VashEXE ButtStallion Tuned Greenie Member

    Joined:
    Feb 25, 2016
    Posts:
    436
    Trophy Points:
    93
    Location:
    a
    Ratings:
    +731 / -3
    To be honest with you, the only part you have that's really going to need tuning for is the larger intake. At WOT and stuff you'll need some MAFCAL around the DP/FMIC for the open loop shit, but that's not gonna keep your car from running. Right now your MAFCAL is set up for the original 2.5" intake, so you've added a shitload of air and the car doesn't know what to do with that. If you don't want to flash a tune for the 3.5" intake for some reason, you can put the original intake back on to verify that's the problem.
     
    • Like Like x 1
  7. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0

    But I have a custom tune for all the new parts I put on including the intake.
     
    Rogan22, via an iPhone, Jul 14, 2021
    #7
  8. VashEXE

    VashEXE ButtStallion Tuned Greenie Member

    Joined:
    Feb 25, 2016
    Posts:
    436
    Trophy Points:
    93
    Location:
    a
    Ratings:
    +731 / -3
    You didn't say that, so as long as that's the case, you need to get a log of this. It's all going to be guess work, but you almost definitely have a huge vacuum leak then. You changed a ton at once, so you need to start with a boost leak test and go from there probably. Logs would give more pointers though.
     
    • Like Like x 3
  9. Enki

    Enki Motorhead Platinum Member

    Joined:
    Feb 10, 2016
    Posts:
    2,244
    Trophy Points:
    113
    Location:
    Tucson
    Ratings:
    +3,235 / -3
    You can verify vac leak or MAFcal issues by disconnecting the MAF and starting the car. If the car starts, you've (probably) not got a leak between the throttle and head, but if it doesn't start, I'd check for leaks by doing a boost leak test.

    If it does start, get a log to post up here, and continue testing.
     
    • Like Like x 2
  10. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0
    Update-
    I went back through (again) and re torqued everything I touched to spec and still nothing. But once I went a little extra on the intake manifold it wanted to start. I was able to get to start up by slightly feathering the throttle until it calmed down and wanted to idle on its own. I got a log of it but I don’t know how to post it here
     
    Rogan22, via an iPhone, Jul 14, 2021
    #10
    • Like Like x 1
  11. Enki

    Enki Motorhead Platinum Member

    Joined:
    Feb 10, 2016
    Posts:
    2,244
    Trophy Points:
    113
    Location:
    Tucson
    Ratings:
    +3,235 / -3
    Export to CSV, drag and drop it to the section you type in.
     
    • Like Like x 2
  12. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0
    idle
     

    Attached Files:

  13. Enki

    Enki Motorhead Platinum Member

    Joined:
    Feb 10, 2016
    Posts:
    2,244
    Trophy Points:
    113
    Location:
    Tucson
    Ratings:
    +3,235 / -3
    LTFT is >8% out so could be improved but looks OK to me otherwise. Anyone else want to chime in?
     
    • Like Like x 1
  14. L337TurboZ

    L337TurboZ World Class Truck Squatter Greenie Member

    Joined:
    Jun 15, 2020
    Posts:
    1,132
    Trophy Points:
    113
    Location:
    Charleston, SC
    Ratings:
    +1,149 / -4
    I doubt the PRV is an issue, you're seeing around 500-600 psi on the HPFP idling. Did you check all your ground connections since you had the intake manifold off? Is the video you attached the longest it will actually run or if you slightly give it gas will it attempt to idle?
     
  15. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0

    No it can run as long as I want it to now, the video was one of the first start ups. After checking things over 100 times it wanted to stay running. The log was the smoothest it was last night. It sounded like it was struggling at first
     
    Rogan22, via an iPhone, Jul 15, 2021
    #15
  16. Awafrican

    Awafrican Moderator Gold Member

    Joined:
    Feb 11, 2016
    Posts:
    3,586
    Trophy Points:
    113
    Location:
    Canada
    Ratings:
    +2,850 / -11
    Sounds like you had a massive leak somewhere that's better now. Wonder if the vcts actuator sensor bracket got bent / broken little piece that hits that button on the far right of the intake manifold by the circle thing
     
    Awafrican, via a mobile device, Jul 15, 2021
    #16
  17. L337TurboZ

    L337TurboZ World Class Truck Squatter Greenie Member

    Joined:
    Jun 15, 2020
    Posts:
    1,132
    Trophy Points:
    113
    Location:
    Charleston, SC
    Ratings:
    +1,149 / -4
    It might have just taken a while to get the fuel system primed again.
     
    L337TurboZ, via a Motorola device, Jul 15, 2021
    #17
    • Like Like x 2
  18. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0
    So I was able to take the car out for a little cruise, definitely some kinks to work out. While giving it more than 40% throttle it sounds like a damn bee beating against a window and shudders awful. It threw a code for misfire cylinder 1 so cleared it then said it for cylinder 2. Cleared it again still acting the same but not throwing codes. I have another new set of plugs coming in tomorrow. Maybe 1 or 2 of the new injectors aren’t running right or is that something that can be worked out in the tune?
     
    Rogan22, via an iPhone, Jul 15, 2021
    #18
  19. VashEXE

    VashEXE ButtStallion Tuned Greenie Member

    Joined:
    Feb 25, 2016
    Posts:
    436
    Trophy Points:
    93
    Location:
    a
    Ratings:
    +731 / -3
    This is not gonna be the tune most likely. Check the ground on the HPFP housing and the harness for the coils and injectors. It sounds like something is fucky and you were obviously messing with all that when you swapped the injectors and everything else.
     
    • Like Like x 3
  20. Rogan22

    Rogan22 Greenie Member

    Joined:
    Jul 14, 2021
    Posts:
    10
    Trophy Points:
    3
    Location:
    New Hampshire
    Ratings:
    +2 / -0


    So after checking and re checking everything I went back and put in the old injectors in cylinder 1,2. Those were the ones that were throwing codes first then it continually was saying multiple misfires. After driving it around it was only saying cylinder 3 was misfiring so I’m thinking the (new) injectors aren’t flow synced. Causing all my issues
     
    Rogan22, via an iPhone, Jul 16, 2021
    #20
Loading...

Share This Page

Users Viewing Thread (Users: 0, Guests: 0)