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codes PO401.402. AND PO303

1998 FORD EXPEDITION 4.6L XLT 4WD Had codes po401, PO 402, and po303, change all EGR AND EGR SENSORS, Changed (did need to) # 3 spark plug and wire also removed and clean throttle body and port holes. Ran great then shakes on take off then takes off like new until I slow and accelerate. then...
- doug floyd
- Thread
- Mar 23, 2022
- Replies: 3
- Forum: 1st Gen Ford Expedition Engine & Performance

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