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

Engine hesitation on 84 C4

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Old Apr 15, 2005 | 11:28 PM
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Default Engine hesitation on 84 C4

Ive got a hesitation coming off idle on my 1984 Corvette. I've been checking for vacuum leaks and other causes. Any suggestions on where to start?
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Old Apr 16, 2005 | 08:44 AM
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From: 84 Blue A4 Garrison Ky
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You might start with a tune up, plugs, wires, cap, fuel filter.
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Old Apr 16, 2005 | 12:41 PM
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I'd start by looking for vacuum leaks and other causes. A prime source of a vacuum leak is between the intake manifold lid and the base. Is the TPS properly set and operating smoothly? Does the MAP check out? How about the timing? There's a start.

RACE ON!!!
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Old Apr 18, 2005 | 12:37 AM
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Here's the things I've done so far:

New Plugs
changed most vacuum hoses (getting about 20 in vacuum now)
set timing (but maybe not correctly) which wire do I pull before setting the timing to 6 degreees BTC? how do I identify it?
Fresh oil, oil filter, air filter.
throttle plates eem to open at the same time.

The hesitation is just off idle, almost kills the motor.
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Old Apr 18, 2005 | 09:33 AM
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From: 84 383 XFire Chandler, AZ
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The wire is near the power brake booster and the connector is black and the wire is brown with a black stripe. Also check your fuel filter and pressure.

Last edited by elkabong; Apr 18, 2005 at 09:36 AM.
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