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Q: 1991 Nissan maxima jerks, rpm needle jumps with jerks. on 1991 Nissan Maxima

Ive cleaned the egr valve, checked for vacuum leaks,replaced ignitioncap and rodor checked for bad wire's i would greatly appreciate any advice on methods to check for faulty sensors Or faulty equipment.
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Do a self diagnosis test with your ECM and pull codes. I bought my repair manual at O'reilys for $25 and shows you step by step how to test and also tells you what codes mean and how to look into those
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