Quote:
Originally Posted by mkodama
Thanks, good to know.
I was monitoring HP fuel rail pressure with my OEM tune and the E85 tune. OEM tune is pinned at 204.00MPa while the E85 tune is at 4.00MPa and then slowly rises to 10MPa. The tune and OFT are seeming much more suspect.
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Here is my diag from the local shop I had my car towed to. I since had it towed back north so I get to be the one to do it.
"Verified customer concern. Found code p1604 start ability malfunction and p0193 fuel pressure sensor circuit high input and p0087 fuel pressure too low began by using scan tool to monitor fuel pressure noticed high side pressure at 56 psi indicating a fault with high pressure side disconnected high pressure fuel pump spill valve and verified circuits are ok and found no issues applied power and ground to spill valve and noticed no change in pressure indicating faulty high pressure fuel pump also noticed erratic pressure readings from sensor one second reading 3000 psi and the other second about 1000 psi then 50 verified sensor connection was ok and circuits ok indicating faulty fuel pressure sensor recommend replacing high pressure fuel pump and pressure sensor"
I've also had minor suspicions about the OFT being the cause. It doesn't help that my p0193 journey began directly after I loaded my first tune 10 years ago. But even though flashing between tunes and using a scan tool to clear the permanent code have miraculously fixed the car, this time nothing is working. I can clear the code, but after 10 minutes of semi-rough idling the car begins to choke, and you can really hear this by how loud the direct injectors are. Then it withers all the way to a stall.
When you rebuilt your engine, did you replace the HPFP with the 2018 revision?