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

1989 cam or crank sensor?

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Old Dec 28, 2010 | 05:35 PM
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Default 1989 cam or crank sensor?

Hello All,

Does anyone know if a 1989 Corvette has a cam or crank sensor? I looked at the problems bad cam and crank sensors have and think it is a issue on my car, but I can't find any information on those parts for that year Corvette.

Does anyone know the a equivalent sensor?

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Old Dec 28, 2010 | 05:44 PM
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neither, It has a dist. with module, cap, rotor, ect. that it uses for it referance
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Old Dec 28, 2010 | 05:45 PM
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No crank or cam position sensors on an 89.

Last edited by STL94LT1; Dec 28, 2010 at 05:46 PM. Reason: dupe
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Old Dec 28, 2010 | 05:51 PM
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OK, thanks.

Can anyone think of a sensor that if bad would cause the engine to "surge" at idle from 600rpm to 700rpm and then back down to 600rpm

Things I've replaced:
Injectors (fuel pressure is good)
O2 sensor
IAC
TPS (Set correctly)
Air Filter
CAT and Mufflers
ECM (Still has old EPROM in it)
All ignition system from plugs to inginition module
Did compression test and engine is good.
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Old Dec 28, 2010 | 05:55 PM
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Originally Posted by Mustang_Eater
OK, thanks.

Can anyone think of a sensor that if bad would cause the engine to "surge" at idle from 600rpm to 700rpm and then back down to 600rpm

Things I've replaced:
Injectors (fuel pressure is good)
O2 sensor
IAC
TPS (Set correctly)
Air Filter
CAT and Mufflers
ECM (Still has old EPROM in it)
All ignition system from plugs to inginition module
Did compression test and engine is good.
Isn't there a learning process for a new IAC?
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Old Dec 28, 2010 | 05:58 PM
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Originally Posted by STL94LT1
Isn't there a learning process for a new IAC?
Is their something I need to do to make it learn. I've been driving it for a good 3 months with this problem and it never goes away.

If I disconnect the dist timing wire the problem does not exist, so its a sensor or computer issue some where. The computer just doesn't like to have a smooth idle.
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