Fuel pressure sudden drop at WOT
Thread Starter
Staging Lane
Joined: Oct 2009
Posts: 81
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Fuel pressure sudden drop at WOT Car is vette c6 ls3 m6 d1sc @11 psi 710 rwhp , fuel system : is stock intank pump + bosch 044 with feed -8 an and return -6 an that start with 2.5 boost switch with regulator and siemens 60lb with stock ls3 fuel rail, i did research more than 2 months but i didnt get anyone with same my issue , the issue is the fuel pressure is 50-52 psi at idle and crusing , but at WOT its jump to 70 psi in 1-2 seconds then suddenly drop to 52 psi while my rpm and boost still climbing! Sound like it connect and disconnect , i did change the bosc pump harness with relay because before they get wire supply from stock pump relay and make it separated to avoid load on pump relay also i change my alternator with bigger 220 amp because i had drop in voltage before . That mean everything i fixed it but still it drop !!!!
