C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Misfire after left U-turn? Weird.

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Old Apr 28, 2006 | 01:29 PM
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Default Misfire after left U-turn? Weird.

I have had my vette for about a month now and it has a strange problem that I am hoping someone has heard of. When you make a quick left u-turn, it misfires on accelleration for about 20yds after again heading straight. I know it sounds crazy , but it does it every time!! Also, this is with a full as well as an empty fuel tank, though I havent driven it with the FP guage on it yet. I have changed the plugs, and the plug wires are all routed properly with no visable damage. Other than this it runs perfect! Anyone heard of this?
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Old Apr 28, 2006 | 02:01 PM
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what year is the vette? Engine? transmission? mileage?

I would wonder if the fuel pump is shutting off... a wiring related issue...
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Old Apr 28, 2006 | 02:08 PM
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Well, if it were a low tank of gas we'd all have the answer, I think I'd get a FP guage and tape it to the window after you hook it up, then I'd go see what happens.
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Old Apr 28, 2006 | 03:55 PM
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Oh, yeah, sorry... Its a 93 Lt1 auto 115k miles. The FP guage on the windshield is next, but I just find it odd that it seems like a single cyl misfire. Only thing I can think is that I am losing fuel pressure and have a single injector that won't fire with low pressure.
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Old Apr 28, 2006 | 05:19 PM
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How much gas was in it?

I had the problems with the car stumbling when accellerating after left turns with under 6 gallons in the tank.

After the new fuel pump, problems solved. I'm guessing that the fresh pump can keep up with the motor even if fuel sloshes away from it intermittently.

The tank fuel cup design on this car is abysmal.
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Old Apr 28, 2006 | 11:39 PM
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Keep it filled at least 1/4 tank. Mine would cut out on acceleration and cornering with low fuel levels.
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Old Apr 29, 2006 | 12:13 AM
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what about the oil level? oil pressure switch? the ecm is watching it as well incase of a roll over ect......maybe hard cornering?
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