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  1. #1
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    Mike Storm "Stormy"
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    Default Out like a light.

    Driving home the other day car dies just like the key turned off. Rush hour as well, pulled over try to restart no go. Waited a few then tried again cant get out too close to the traffic so something has to work. Turn key on off to hear fuel pump. Yes I hear it gage dose show fuel.But tach isnt moving it move like it has power but no more. Called AAA. Then tried again bang I move the car so I can get out. LSS got home and just today tried again started but after 10 min it died no issues just out like a light.Check to see if tach moves nope. Now my question is I need a new coil, icm, opti, car?

    Sent from my LG-G710 using Tapatalk



    1995 Trans Am - CAI - TB coolant bypass - Headers & Performance Muffler - Poly mounts - stock LT1/A4 - 13.3 1/4 - 1.9 60 foot , driven daily.
    2008 C6 Corvette LS3 Snake charmer Ram Air intake. 6 Speed Switchable mild to wild exhaust.
    2002 Silverado LT Extd Cab Z71 5.3 A4 Composite Bed Stock

  2. #2
    LTx Guru


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    Default

    The tach is driven based on the low resolution pulse from the Opti. The tach should move up 200-300 RPM while the engine is cranking.

    No scanner? DTC 16 for loss of Opti low res pulse does not turn on the SES light.

    Spark at the coil wire? At the plugs?

    Test for Opti signals, using a multi-meter:

    http://shbox.com/1/4th_gen_tech2.html#opti_test
    Last edited by Injuneer; 02-08-2020 at 06:07 PM.

    94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams solid roller / TH400+GearVendors OD / 4.11's/Strange 12-bolt / 300-shot (dry) N2O / Spohn Suspension / 6-pt roll bar /AutoMeter instrumentation / MoTeC M48 Pro engine management system /a few other odds 'n ends.

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  4. #3
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    Mike Storm "Stormy"
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    Default

    Thanks its pouring rain now. I remember reading somewhere you said this wasnt sure. I'll check it out . It intermittent though It will start now but shut off when ever.

    Sent from my LG-G710 using Tapatalk
    Last edited by Stormyweather; 02-08-2020 at 07:33 PM.



    1995 Trans Am - CAI - TB coolant bypass - Headers & Performance Muffler - Poly mounts - stock LT1/A4 - 13.3 1/4 - 1.9 60 foot , driven daily.
    2008 C6 Corvette LS3 Snake charmer Ram Air intake. 6 Speed Switchable mild to wild exhaust.
    2002 Silverado LT Extd Cab Z71 5.3 A4 Composite Bed Stock

  5. #4
    Long Live the Opti


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    Sound like when my ICM died once. Driving along and then poof, dead. Little while later, fired back up and lasted a few minutes, then poof, dead.
    Quote Originally Posted by Ryan Stout View Post
    I would try to work my neck muscles but I'm not invited to the LS guy parties.

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  7. #5
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    Mike Storm "Stormy"
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    Quote Originally Posted by Fastbird View Post
    Sound like when my ICM died once. Driving along and then poof, dead. Little while later, fired back up and lasted a few minutes, then poof, dead.
    Yup just like the key went out. Haven't tested it yet need my meter but its at work.



    1995 Trans Am - CAI - TB coolant bypass - Headers & Performance Muffler - Poly mounts - stock LT1/A4 - 13.3 1/4 - 1.9 60 foot , driven daily.
    2008 C6 Corvette LS3 Snake charmer Ram Air intake. 6 Speed Switchable mild to wild exhaust.
    2002 Silverado LT Extd Cab Z71 5.3 A4 Composite Bed Stock

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