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  • #1

    Service Engine Soon Light??

    I was driving this morning, and my service engine soon light started blinking, and the engine was running rough....any ideas???


    1996 TransAM
    Enkei "Win" Wheels
    Tags: None
  • #2
    misfiring...but get that bad boy scanned.

    Christopher Teng

    1999 · A4 · 3.73's · Auburn LSD · Whisper Lid · K&N · Pacesetter Headers/Y-pipe
    Magnaflow Cat & Catback · MSD Coils/Wires · Bosch +4 Plugs · EGR Bypass
    B&M SuperCooler · 160* Stat · Descreened MAF · SLP CAI · BMR STB & SFC
    Strano Sways · Eibach Springs · Bilstein HD Shocks · Hawk-Pads · Brembo Blanks
    Speedlines · Nitto 555s · Texas Speed Mail Tune

    Lots of Weight Savings · Stubby Antenna · Corbeau TRS · Zaino · 273K

    F-Body Dirty Dozen

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    • #3
      Get it scanned like Chris said. It helps if you post your car info here year and such, so we know if it is an LT1 or LS1. I am not so good to tell from your picture. If it is an LT1 (like 94 or 95) you can check the Air Pump fuse to see if it blew. That is really common for that engine and it will throw a code and SES.

      Good Luck
      Sean
      1994 Z28, 6 spd, LE2 Heads, GM 1.6 RR, .026" head gasket, SLP: CAI-Headers (CARB legal)-ypipe-2 on the left-lightweight flywheel-short throw, Random tech cat, CF dual friction, LT-4 KM.

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      • #4
        Its an Lt1 in the pic

        1994 Firebird Formula 138,000 Completly Stock

        1995 Caprice 9c1 61,000
        2001 Intrigue GL

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        • #5
          Originally posted by Sean 94z28
          Get it scanned like Chris said. It helps if you post your car info here year and such, so we know if it is an LT1 or LS1. I am not so good to tell from your picture. If it is an LT1 (like 94 or 95) you can check the Air Pump fuse to see if it blew. That is really common for that engine and it will throw a code and SES.

          Good Luck
          Sean
          But a blown air fuse will not make the engine run rough.
          Tracy
          2002 C5 M6 Convertible
          1994 Z28 M6 Convertible
          Current Mods:
          SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

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          • #6
            Originally posted by TraceZ
            But a blown air fuse will not make the engine run rough.
            correct, wont it make the idle lope and make the coolant fans come on?
            2000 WS6 T/A M6. Monster stage 3 clutch, flowmaster cat back, 4.10's, SLP lid, Hurst shifter.
            1996 Mustang GT 5 speed STOCK DD
            past rides:
            1996 Mustang GTS bright tangerine orange
            2003 Mach 1 azure blue drag car (10.90@118 record holder for fastest N/A mach)
            1969 Mach 1 house of colors candy apple red393 stroker 100 shot (10.829@125 in street trim)
            2003 Mach 1 Torched red FRPP aluminator/vortech 666RWHP
            2008 Mustang GT JDM stroker long block, Saleen 2.3 twin screw
            1980 Mustang L 13.7: 418 stroker
            1994 Z28 A4 rebuilt from wreck
            1994 Z28 A4 totaled

            Comment

            • #7
              I'll guess from the info supplied (blinking SES light) that the car is a 96 or 97 OBD-II. Generally an indication of a misfire. A scan will show you what caused the light. If it is a misfire, it will show which cylinders are misfiring, or if it is a "random" misfire.

              But as a helpful suggestion, PLEASE include the year of your car, trans type and any major mods when you ask a tech question.... that way no one has to guess. It's fairly easy to put together a "signature" for that purpose.
              Fred

              381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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              • #8
                Originally posted by azkkn
                correct, wont it make the idle lope and make the coolant fans come on?
                I dont recall for sure if my fans came on, but it ran just fine when the fuse blew and triggered the light. I put a new fuse in it and the SES light went away.
                Tracy
                2002 C5 M6 Convertible
                1994 Z28 M6 Convertible
                Current Mods:
                SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

                Comment

                • #9
                  If the light is blinking, not good. It is a catalyst damaging misfire. Basically means shut the car off!
                  1996 WS6 T/A - M6,not stock
                  2004 GTO - M6, stock
                  lost rides
                  2003 Silverado SS - stock
                  2000 Yamaha R1 - fast enough stock

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