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engine miss 94 ls400

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Old 04-19-12, 09:06 AM
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petendeb
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Default engine miss 94 ls400
My 94 ls400 has a engine miss. It runs well upon start-up, but starts to miss as engine warms up. this issue gets progressively worse the longer you drive the vehicle. Any thoughts would be appreciated.
Last edited by petendeb; 04-19-12 at 09:13 AM. Reason: wrong info
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Old 04-20-12, 10:01 PM
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Yamae
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Sounds like a fuel pressure issue to me. A friend of mine had a similar problem on 94 Celsior. The pressure was dropped after 15 to 20 minutes run. He replaced the fuel pump and the problem was gone.
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Old 04-20-12, 10:59 PM
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GS4_Fiend
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Very common problem, check all secondary ignition systems - spark plugs, wires, cap. Rule out the basic first.
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