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I have a 98 Suburban 5,7L.

Check engine light flashes and engine doesn't run smoothly. It vibrates a lot.

How do I read the fault codes without diagnostic equipment?

Any other suggestions to my problem are also welcome.

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Jumping pins with a paperclip ended in '95.

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You probably need a new distributor cap, plugs, and wires. As other have said you need a scanner to read codes.

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Got a scanner now.

First no codes to read. Have ordered new cap and rotor.

Got a new fault code PO171 System til lean bank 1.

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