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[ "Next we took the car to a mechanic, who switched the fuel pump (C/OPN) and EFI Main relays with 2 less-used relays and the problem seemed to disappear -- for about a month. Then, after a two-hour drive and shutting the engine off for maybe 10 mins - i.e., still warm - the problem recurred. At this point we switched the C/OPN and EFI Main relays and the car started right up. We then replaced the C/OPN and EFI Main relays with two new relays. The car started up OK for a week, then once again began intermittently not to start."
Can we clean the grounds in this circuit?
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