Quote:
Originally Posted by TJay74
While the pump is mechnical, the electrical sensor has to be plugged in for the pump to work otherwise it could go into bypass mode. The sensor provides the PSI which the ECM needs to know, but it can also open the bypass ports if the pressure is to high.
My guess is GM change the LT1 connectors and the LT4 connectors to keep people from being able to plug and plug the LT4 HPFP into a LT1 vehicle. So my guess if that is the case that either a adapter harness will be needed or the sensor on the HPFP will need to be swapped over.
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Yeah exactly but the sensor doesn’t come off. And that’s wht I was trying to get at to see if anyone made a adapter or what everyone with a 19 or new has done. I’ll be going to the dealership here shortly to get a harness from a zl1 I ordered to see if it will be a swap. I’ll update once I figured it out.
Harness 12689504 will be a direct swap for harnesses for anyone with a 2019 trying to upgrade the hpfp to the lt4 pump.