I recently checked my voltage at the pump. For the record I was using the CZP FPC bypass harness. I have a brand new wiring specialties pro series engine harness and a new z1 alternator harness and a 180 amp alternator. My alternator was charging 14.4 at idle but the pump was seeing 12.9 to 13.1 at idle. Strangely my Haltech Platinum Pro always said it was seeing around 13.5v at idle at this time When the efans kick on it would dip all the way to 11.9 for a split second before stabilizing. I decided I would hard wire the pump after seeing that. Just finished running a likely overkill 8 gauge power wire to an authentic Bosch relay and it is now seeing 14.1 at the pump at idle. Interestingly it now also sees 14v at idle on the Haltech. It was such a difference that I had to adjust the injector dead times in the 14v cell so it wouldn't run super lean at idle. No real question here just following up on a locked message. However, I am a little curious as to where the Haltech was pulling its voltage signal from and why the pump seemed to affect that circuit so much.
Follow Ups
Follow up Re: walbro 450 on stock wiring - Buckaroo Banzai11:19:14 09/19/25
