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Supercharged Mustang Cobra Running Rough

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  • #1

    Supercharged Mustang Cobra Running Rough

    Hey guys I have an issue with my mustang, I know it's Eurodrivers but this just seem to be the most convienient place for me to ask at the moment.
    The car has an aftermarket ecu on it so obd2 scanning doesn't work.
    The car won't idle, I have to give it a little gas to idle
    Car runs very rough even revved up
    Boost gauge does not show any vacuum being produced
    Supercharger over boosts stock 13psi went up to 20psi and I got scared and don't want to test driving it until problem is fixed
    Changed fuel filter, plugs
    Made sure coil packs work properly
    Car does not run maf sensor
    New gas all old gas drained because car was parked for 7 months
    Idled fine for 5min and drove fine for 1min then car wouldn't idle and ran very rough(ps this was before I changed anything)

    I'm leaning towards a vacuum leak but we tried to spray brake cleaner around the hoses and nothing happened, but then we also tried spraying into the intake and did not make a difference

    I don't have the car with me right now so I couldn't do any testing but I will need the car as soon as I go back to Calgary, so right now I need to gather ideas from you guys to diagnose the car. No ford jokes please thanks guys!
    Last edited by kujiwara; 04-11-2015, 12:27 PM.
    Current Fleet
    #ProjectICreate Jetta GLI32
    2001 Cobra #88/3786
    1989 Jetta Trophy 1 of 500
    2004 Audi A2 FSI Colour Storm RHD
    2015 B8.5 S4 Sepang/Technik/6MT/SD/AAD/CF

    Motorsport Engineer
    Tags: None
  • #2
    Re: Supercharged Mustang Cobra Running Rough

    Kuji who made the aftermarket PCM?

    Comment

    • #3
      Re: Supercharged Mustang Cobra Running Rough

      I don't know a ton about SC's...but I would lean towards vacuum leak somewhere.
      Hers 2009 Audi A4 6sp manual
      Mine....2005 Golf TDI, VNT 17, Malone tuned stage 4, Spec stage 2 clutch, FMIC, Ventectomy, NewSouth gauges, BuzzKen 2.5 turbo back exhaust, Evolution Skidplate, Helix OEM Reps retrofitted with Morimoto Bixenon mini's, ST coils, colour matched Huffs. Frostheater

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      • #4
        Re: Supercharged Mustang Cobra Running Rough

        Since you drained the tank and stirred up whatever crap might be in there, could you have plugged up your new fuel filter?
        Stefan
        -> '19 Deep Black Pearl Alltrack
        -> '05 Urban Grey Passat Wagon TDI.
        -> Past rides: '14 Allroad, 06 Mazda5, '98 Jetta K2, '01 Jetta TDI, '91 Mazda B2200, '81 Toyota Cressida
        -> FutuRe Ride...??!

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        • #5
          Re: Supercharged Mustang Cobra Running Rough

          Originally posted by stefan View Post
          Since you drained the tank and stirred up whatever crap might be in there, could you have plugged up your new fuel filter?
          this is very possible or something is in one of the lines. If it ran good before, then you did something, and then it doesn't run
          Now offering detailing services!! http://www.gtrauto.ca/detailing-services.html

          United Motorsport, Kerma TDI, KW, APR, COBB, Magnaflow, K&N, AFE, Motul, Lubromoly, Sonax, Air Lift, HPA, Ohlins, Klutch Wheels, Remus Exhaust

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          • #6
            Re: Supercharged Mustang Cobra Running Rough

            Originally posted by Lo)2enz0 View Post
            Kuji who made the aftermarket PCM?
            Western motorsports built the car and used their Simple Digital System Ecu
            Current Fleet
            #ProjectICreate Jetta GLI32
            2001 Cobra #88/3786
            1989 Jetta Trophy 1 of 500
            2004 Audi A2 FSI Colour Storm RHD
            2015 B8.5 S4 Sepang/Technik/6MT/SD/AAD/CF

            Motorsport Engineer

            Comment

            • #7
              Re: Supercharged Mustang Cobra Running Rough

              Try and get your hands on a "smoker" to check for vacuum leaks. Way better than the method you used.
              Last edited by Mcrow; 04-11-2015, 12:31 PM.
              Mitch

              1996 Harlequin
              2001 Toyota Highlander

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              • #8
                Re: Supercharged Mustang Cobra Running Rough

                Originally posted by Mcrow View Post
                Try and get your hands on a "smoker" to check for vacuum leaks. Way better than the method you used.
                We tried to use a e cig but none of us are good at puffing it so I guess that didn't really work for us lol, I guess it's time to find someone that actually smokes lol! Any heavy smokers want to blow my horse real quick?
                Current Fleet
                #ProjectICreate Jetta GLI32
                2001 Cobra #88/3786
                1989 Jetta Trophy 1 of 500
                2004 Audi A2 FSI Colour Storm RHD
                2015 B8.5 S4 Sepang/Technik/6MT/SD/AAD/CF

                Motorsport Engineer

                Comment

                • #9
                  Re: Supercharged Mustang Cobra Running Rough

                  Originally posted by kujiwara View Post
                  Any heavy smokers want to blow my horse real quick?
                  For fucks sakes Jerry.
                  Last edited by GingerBeef; 04-11-2015, 01:40 PM.
                  Jason

                  "You dont buy a Volkswagen once, you buy it ten times."
                  ---Samuel Moore

                  Instagram: @Wangtastic
                  PM me to get your car detailed! - Brightside Detailing

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                  • #10
                    Re: Supercharged Mustang Cobra Running Rough

                    Lmfao....last two posts are some funny stuff!
                    Hers 2009 Audi A4 6sp manual
                    Mine....2005 Golf TDI, VNT 17, Malone tuned stage 4, Spec stage 2 clutch, FMIC, Ventectomy, NewSouth gauges, BuzzKen 2.5 turbo back exhaust, Evolution Skidplate, Helix OEM Reps retrofitted with Morimoto Bixenon mini's, ST coils, colour matched Huffs. Frostheater

                    Comment

                    • #11
                      Re: Supercharged Mustang Cobra Running Rough

                      Is he gonna polish the knob too??
                      --
                      Rod
                      Ex-presidente

                      Drive

                      2016 VW Golf .:R

                      Drove
                      2001.5 Audi S4 / Santorin Blue STAGE II+ / JFonz Tuned

                      Comment

                      • #12
                        Re: Supercharged Mustang Cobra Running Rough

                        Mustang, horse, I see what you did there lol
                        Name: Brent
                        His: '04 TDI Golf Mods: None If it's smoken it ain't broken
                        Family: '15 Jetta Sportwagon
                        Fun car: '92 Blue Karmann Crabby Cabby Mods: Coils, front and rear swaybars, LED interior lights and some other old things.

                        Comment

                        • #13
                          Re: Supercharged Mustang Cobra Running Rough

                          Originally posted by Natty54 View Post
                          this is very possible or something is in one of the lines. If it ran good before, then you did something, and then it doesn't run
                          Don't know much about gas engines but I'd wondering some basic things:
                          Did you put the wires back in the right order?
                          Coilpack seated correctly?
                          Injectors working ok?
                          MAF sensor reconnected?
                          Reset car by disconnecting battery and reconnecting?
                          New coilpack might be defective?
                          Last edited by witchcraftz; 04-11-2015, 08:18 PM.

                          Comment

                          • #14
                            Re: Supercharged Mustang Cobra Running Rough

                            Originally posted by witchcraftz View Post
                            Don't know much about gas engines but I'd wondering some basic things:
                            Did you put the wires back in the right order?
                            Coilpack seated correctly?
                            Injectors working ok?
                            MAF sensor reconnected?
                            Reset car by disconnecting battery and reconnecting?
                            New coilpack might be defective?
                            The wires are marked for each cylinder so they're definitely in the right order,
                            coilpacks would be seated properly since we checked it like 5+ times,
                            injectors haven't been tested yet but the car is so loud we don't know how to test it with a screw driver,
                            the car doesn't run a maf sensor,
                            battery disconnected and ecu reset multiple times doesn't help,
                            we also swapped coil packs around to make sure they work
                            Current Fleet
                            #ProjectICreate Jetta GLI32
                            2001 Cobra #88/3786
                            1989 Jetta Trophy 1 of 500
                            2004 Audi A2 FSI Colour Storm RHD
                            2015 B8.5 S4 Sepang/Technik/6MT/SD/AAD/CF

                            Motorsport Engineer

                            Comment

                            • #15
                              Re: Supercharged Mustang Cobra Running Rough

                              Originally posted by Ur0Drivr View Post
                              Is he gonna polish the knob too??
                              ill shave it
                              Current Fleet
                              #ProjectICreate Jetta GLI32
                              2001 Cobra #88/3786
                              1989 Jetta Trophy 1 of 500
                              2004 Audi A2 FSI Colour Storm RHD
                              2015 B8.5 S4 Sepang/Technik/6MT/SD/AAD/CF

                              Motorsport Engineer

                              Comment

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