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    Help! When it won't start, does it have fuel and spark?

    When it won't start, does it have fuel and spark?
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    The reason you hear it most often after cold...

    The reason you hear it most often after cold starts is as soon as the engine is running, the ECM retards the spark, to heat the exhaust quickly so the cats light off. When the spark is that retarded,...
  3. I know Jim Mero pretty well. I was one of the two...

    I know Jim Mero pretty well. I was one of the two people who, back in late 2017, helped Jim validate his MR cals for 09-13 Z06/Z07. It made quite an improvement to my '12 Z06 in the Sport mode.
    ...
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    Question: Open the driver door. Look at IP display. It...

    Open the driver door. Look at IP display. It says "Corvette" and in the lower left corner, the mileage is displayed.
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    Help! To start the diagnosis, I'd get the car up on a...

    To start the diagnosis, I'd get the car up on a lift or high jack stands and inspect all bolts holding powertrain mounting brackets and check all powertrain mounts.

    Also, inspect the frame around...
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    Help! If you can drive the car for 30-min, come back to...

    If you can drive the car for 30-min, come back to the shop, wait 10-min, try to start then have a no-start condition, I'd say that rules out a choke problem as the choke shoud be open. It also,...
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    You're welcome. Glad to be of service.

    You're welcome.
    Glad to be of service.
  8. OMG that is a freakin' long post. (sigh) I...

    OMG that is a freakin' long post.
    (sigh)

    I suspect you may have more knowlege about the history of the 4 than I do. I was unware there was an 827 cfm version nor have I ever heard of a "DOVE...
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    I would not suggest using a base C7 for track...

    I would not suggest using a base C7 for track activities. It lacks the engine and transmission cooling system capability, lacks the right tires and lacks the proper suspesnion, however, if you...
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    Is this engine modified at all? If so, to what...

    Is this engine modified at all? If so, to what extent.
    Also, when it goes into "...a kind of limp mode...", does the check engine light come on?
    When you see the spark retard all the way to 1°,...
  11. For a street high-performance application below...

    For a street high-performance application below 450-hp, a properly modified and jetted 800-cfm Quadrajet would be my choice rather than a Holley of similar air flow capacity. It would the performance...
  12. Thread: Code 56

    by Hib Halverson
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    If you have the Factory Service Manual for a '90,...

    If you have the Factory Service Manual for a '90, you'll find an in-depth diagnostic charge for Code 56 on an LT5. There are a number of places in the SPT system where leakage can set that code.
    ...
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    You'll need to order a Service Manual from here...

    You'll need to order a Service Manual from here in the States. In reading this thread, your car may have a number of problems with electronics. Without the diagnostic information in the FSM, you're...
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    Question: Also try this one: 1994 CHEVROLET CORVETTE 5.7L...

    Also try this one:
    1994 CHEVROLET CORVETTE 5.7L V8 OHV Oil Temperature Sender | RockAuto

    It's currently out of stock but once it gets back in stock, Rockauto.com typically has low prices and...
  15. Try the Denso IT22. It's two ranges colder than...

    Try the Denso IT22. It's two ranges colder than stock and ought to work great in an LT4 with a 150 shot of nitrous.

    I use the IT22 in my LS6 and LS7 both of which are modified. Also I used it in...
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    Keep in mind that once the engine dies, if the...

    Keep in mind that once the engine dies, if the ignition is still on the check engine light and the check gauges lights may come on and that's normal.

    As for why the engine dies.

    If you are...
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    It's worth way more than enough to make you...

    It's worth way more than enough to make you REALLY wish you had the six large back in '74.
  18. Thread: Fng

    by Hib Halverson
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    Glad to have you here at the CAC. What kind of...

    Glad to have you here at the CAC. What kind of ZR1, C4, C6 or C7?
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    Hey there "Jeffe913@gmail.com"- Welcome to the...

    Hey there "Jeffe913@gmail.com"-

    Welcome to the CAC!
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    The Owner's Manual probably did not recommend use...

    The Owner's Manual probably did not recommend use of differential fluid in the automatic trans or the manual transmission.

    With respect to an automatic trans, "flush" means replacement of old...
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    If we are talking about an automatic trans,...

    If we are talking about an automatic trans, "flush" means replace all the fluid with new fluid using a machine which connects to the trans and sucks out the old fluid and pumps in new fluid. "Change"...
  22. Typically, you don't need to pressure bleed a...

    Typically, you don't need to pressure bleed a hyd. clutch. All you need to do at most is manually bleed it and often just working the clutch pedal after changing/adding fluid gets the air out of that...
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    Don't feel bad, I cracked a C6 Z06 wheel too...a...

    Don't feel bad, I cracked a C6 Z06 wheel too...a rear 20x12.

    Another name I've used for our car is Bad-Assed Bee.
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    The evaporator drain is no inside the car. ...

    The evaporator drain is no inside the car.

    It's the hose which drips water if you idle for a long period while parked with the A/C on. To be honest, I don't know exactly where it is on a C4 but...
  25. So...that wheel was a porous casting....

    So...that wheel was a porous casting. Chromeplating can solve that problem.

    Aftermarket wheels, especially those made offshore are notorious for air leakage due to porosity.
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