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

running rough when warm?90 l98?

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Old Dec 1, 2007 | 11:04 PM
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Default running rough when warm?90 l98?

Any ideas on what would cause a l98 to run rough when warm?

Thanks
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Old Dec 1, 2007 | 11:43 PM
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injectors. Check them with an OHM meter, should be about 16 ohms.
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Old Dec 1, 2007 | 11:58 PM
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as cold spec is 16.5 +/-.3 ohm. Hot reading will be higher.....if the injectors are good. Otherwise, you have a problem with the injectors.
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Old Dec 2, 2007 | 04:58 PM
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Default injectors

any kind of an estimate, on what that would take to fix?Obviously its dependent on how many injectors but any ballpark on what I would expect to pay?
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Old Dec 2, 2007 | 06:22 PM
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A set of injectors will run you from about $200 (re-manuf) to about $300+ for a new set. You can change them out yourself (depending upon you having some basic tools and mechanical knowledge) and save the labor cost. You will need some plenum gaskets and new "O" rings for the fuel tubes and injectors. The gaskets and O rings will be somewhere in the $30 to $40 range.

If these prices seem steep to you, get a quote from a dealer or service center

This is not a difficult task and let me know if you need more info on this project

HOWEVER, make sure you have bad injectors before you start taking 'em out!

Bob
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Old Dec 3, 2007 | 08:10 AM
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Before you spend any money do a simple check of some engine components like vacccum lines, spark plug wires, etc.

BTW, when you remove your plenum, you may want to replace your egr valve (suggest delco only).

Last edited by KeyWestJack; Dec 3, 2007 at 08:13 AM.
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