Possible Throttle Issue

Discussion in 'Mazdaspeed 3 Troubleshooting' started by Eric J, Feb 8, 2023.

Watchers:
5 users.
  1. Eric J

    Eric J Greenie N00B Member

    Joined:
    Feb 8, 2023
    Posts:
    5
    Trophy Points:
    3
    Location:
    Vancouver
    Ratings:
    +2 / -0
    I have a 2008 Mazdaspeed 3 that has been bulletproof for 40000km, recently my check engine light came on while highway driving. The original code was IAC so we replaced an O-Ring which we thought was creating a vacuum leak. the check engine light then came back on and we had a mechanic use his code scanner we got codes from the accelerator pedal, throttle body, and idle air control.

    The RPMs increase from idle 600-800 up to 1100-1500 immediately after I shift into gear i can't find anyone with any information on how this would happen.

    thanks,

    Year/Make/Model: 2008 Mazdaspeed 3
    Mileage: 145000KM
    Location: Engine/Transmission
    Concern: The RPMs increase from idle 600-800 up to 1100-1500 immediately after I shift into gear
    DTC's: Acellerator Pedal, Throttle Body, IAC
    Modifications: Cold Air Intake, Suspension
    ECU/Tuning Software: Hypertech
    Tuner: Hypertech
    Is the concern intermittent? Consistent
    Can you duplicate the concern? repeatable every time
    Recent Repairs: 30km ago Throttle body / Gasket
    Correction:
     
    Last edited by a moderator: Feb 25, 2023
  2. jsilva

    jsilva Silver Member

    Joined:
    Jan 10, 2020
    Posts:
    599
    Trophy Points:
    43
    Location:
    PA
    Ratings:
    +148 / -11
    You’ll probably get some hassle about using Hypertech… Likely unrelated but maybe you could restore the factory tune while you troubleshoot this issue.

    My initial thought was a potential throttle body issue, and reading that you had it replaced 30k ago makes me wonder. Why was it replaced?

    I had an issue 2 years ago that eluded me for weeks. Got various codes including something with the accelerator position. I replaced the pedal, swapped out another throttle body (twice), and did lots of testing. It ended up being just a weak connection on one or more of the wires of the connector going to the throttle body.
     
    • Like Like x 2
  3. 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
    how old is your battery? for some reason when the battery starts to get weak it screws with the electric throttle on these cars
     
    • Like Like x 1
  4. Eric J

    Eric J Greenie N00B Member

    Joined:
    Feb 8, 2023
    Posts:
    5
    Trophy Points:
    3
    Location:
    Vancouver
    Ratings:
    +2 / -0
    sadly i don't have the exact details behind the replacement but I have heard that this tune might chew through throttle bodies (removed the accessport/tune today). ill go through and do a deep dive on the wiring/battery see if its just an electrical issue.
     
  5. Malevolous

    Malevolous Greenie Member

    Joined:
    Feb 16, 2023
    Posts:
    30
    Trophy Points:
    8
    Location:
    NYC
    Ratings:
    +4 / -0
    Hi, I literally made my account a few minutes ago to respond to your thread. I'm about to purchase a tuned & built (but 80k+ miles on the block) '07 MS6 on Saturday that has a similar issue to the OP. I'm not sure if the last owner did any replacements to try and fix this issue, but shifting into 1st brings the RPMs up, just like you described, and triggers a CEL if left idling in 1st for too long. Driving for a while makes it disappear.

    Besides changing all fluids, coils, plugs, filters, etc., this CEL will be the first thing I tackle when I take delivery of the car on Saturday. We might have the same issue so I'll keep an eye on this thread for your updates and post up my own when I have them.
     
  6. SyntheticAtmosphere

    SyntheticAtmosphere You only get ONE ride, ONE ticket, ONE time! Silver Member

    Joined:
    Aug 1, 2016
    Posts:
    561
    Trophy Points:
    93
    Location:
    Canada
    Ratings:
    +610 / -0
    Welcome to the forum. Im always happy to see another MS6 show up here. Once you pick the car up, post a new thread for sure and we can help you through your issues with your car.
     
    • Like Like x 1
  7. Eric J

    Eric J Greenie N00B Member

    Joined:
    Feb 8, 2023
    Posts:
    5
    Trophy Points:
    3
    Location:
    Vancouver
    Ratings:
    +2 / -0
    over the last few weeks I've tried a couple things and no luck

    tried a new battery, no fix
    retrained my computer to the sensors, no fix
    going to have a local shop reset my tune to factory and hopefully that saves us
    (my sneaking suspicion is that the hypertech tune just screws with the throttle and controlling rpms)
     
    • Like Like x 1
  8. 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
    You don't need a shop to uninstall the hypertech you just do it
     
    Easter Bunny, via a mobile device, Feb 25, 2023
    #8
    • Like Like x 1
  9. Malevolous

    Malevolous Greenie Member

    Joined:
    Feb 16, 2023
    Posts:
    30
    Trophy Points:
    8
    Location:
    NYC
    Ratings:
    +4 / -0
    Previous owner of mine thought the tune might have something to do with it, too. Let us know how you make out

    Sent from my SM-N986U using Tapatalk
     
    Malevolous, via a mobile device, Feb 26, 2023
    #9
  10. Eric J

    Eric J Greenie N00B Member

    Joined:
    Feb 8, 2023
    Posts:
    5
    Trophy Points:
    3
    Location:
    Vancouver
    Ratings:
    +2 / -0
    any luck there pal?
     
    • Like Like x 1
  11. Malevolous

    Malevolous Greenie Member

    Joined:
    Feb 16, 2023
    Posts:
    30
    Trophy Points:
    8
    Location:
    NYC
    Ratings:
    +4 / -0
    I wish, still replacing and upgrading parts lol. My current situation:[​IMG]

    Sent from my SM-N986U using Tapatalk
     
    Malevolous, via a mobile device, May 1, 2023
    #11
  12. Malevolous

    Malevolous Greenie Member

    Joined:
    Feb 16, 2023
    Posts:
    30
    Trophy Points:
    8
    Location:
    NYC
    Ratings:
    +4 / -0
    Didn't forget about you. Still going at it. I will say I found a lot of potential vac leaks and bad or damaged gaskets. My issues could be due to that. Hoping to be up in about a month so I'll post back. You have any luck?

    Sent from my SM-N986U using Tapatalk
     
    Malevolous, via a mobile device, Aug 14, 2023
    #12
Loading...

Share This Page

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