Hi guys,
I know I'm a few years late to this thread but I'm at my wits end so hoping I can get lucky and find someone who can help figure out what's wrong.
I've got a '06 LGT with a VF53 turbo, Process West TMIC, ID 1050x injectors, and some other supporting mods. Recently my friend noticed my car was running lean and knocking right when boost starts to come in, so I decided to upgrade my fuel pump and wiring. I went with the AEM 340LPH fuel pump and their 20 amp relay wiring kit.
Everything was installed and running fine (or so I thought). My knocking/lean issue went away, but I noticed that every time I get on the throttle, when the duty cycle of the fuel pump goes from 66% to 100%, I will hear the relay click very rapidly 4 or 5 times. It does not click anymore if I keep accelerating all the way to redline, but will click again the next time I hit 100% duty cycle on the fuel pump. I thought maybe the clicking was normal, but after a few days my car threw a CEL code P0230 - Fuel pump primary circuit. This happened 2 times after resetting the code... the car didn't die and still drove normally, but I drove it gently after the code came on.
The way my mechanic wired the relay was terminal 30 to the battery, terminal 87 to the fuel pump, terminal 85 to the fuel pump switch line from the ECU, and terminal 86 to ground. I'm not in the US and my mechanic has never done a relay kit like this before and I know next to nothing about wiring.
Does anyone have any idea what could be causing the clicking sound from the relay and the P0230 CEL code? I would really appreciate any help, thanks!