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The Terminator
Engine/Tuning
Help diagnose fuel/alternator issue
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<blockquote data-quote="hasonic" data-source="post: 16474262" data-attributes="member: 199193"><p>I agree about the new alternator being bad, gonna get a replacement from kenneth but my data log shows that even at start up, when the engine bay is cool and the alternator is charging 14 volts the same symptom occurs. The voltage shown at the ecu stays in the 14 give or take .2 volts and the pump gets mid 13 volts and suddenly drops to 5 volts and shoots back up right away while the voltage at the battery is still in the 14 volt range. </p><p></p><p>Am i wrong to think maybe some relay along the fuel wiring harness might be going off, i heard theres like 2 or 3 relays related to the fuel system my car has already 73k miles.</p><p></p><p>Im trying to find that wiring diagram for the fuel system so I can start from the beginning and trace it all the way to the pumps.</p></blockquote><p></p>
[QUOTE="hasonic, post: 16474262, member: 199193"] I agree about the new alternator being bad, gonna get a replacement from kenneth but my data log shows that even at start up, when the engine bay is cool and the alternator is charging 14 volts the same symptom occurs. The voltage shown at the ecu stays in the 14 give or take .2 volts and the pump gets mid 13 volts and suddenly drops to 5 volts and shoots back up right away while the voltage at the battery is still in the 14 volt range. Am i wrong to think maybe some relay along the fuel wiring harness might be going off, i heard theres like 2 or 3 relays related to the fuel system my car has already 73k miles. Im trying to find that wiring diagram for the fuel system so I can start from the beginning and trace it all the way to the pumps. [/QUOTE]
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Help diagnose fuel/alternator issue
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