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SVTPerformance's Chain of Restaurants
The Distillery
New e85 car voltage drop to 12v at 4500 rpm
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<blockquote data-quote="MaximumVelocity" data-source="post: 13019576" data-attributes="member: 51716"><p>Voltage drop where? If you are monitoring the voltage at the PCM, battery or alternator terminals, it will be a charging issue. </p><p>If voltage is dropping at the (+) terminal on the pump, you likely have a wiring issue. Have you done a wiring upgrade with good quality amp wire to the relays, and kept the relays close to the pumps (relays should be rated for at least 30A)? Do a voltage drop test...from battery to pos terminal, from terminal to relay, from relay to pump (+), from relay (-) to ground , and from pump (-) to ground. If any of these differ by more than 0.3V then you have found the issue.</p></blockquote><p></p>
[QUOTE="MaximumVelocity, post: 13019576, member: 51716"] Voltage drop where? If you are monitoring the voltage at the PCM, battery or alternator terminals, it will be a charging issue. If voltage is dropping at the (+) terminal on the pump, you likely have a wiring issue. Have you done a wiring upgrade with good quality amp wire to the relays, and kept the relays close to the pumps (relays should be rated for at least 30A)? Do a voltage drop test...from battery to pos terminal, from terminal to relay, from relay to pump (+), from relay (-) to ground , and from pump (-) to ground. If any of these differ by more than 0.3V then you have found the issue. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
New e85 car voltage drop to 12v at 4500 rpm
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