Trouble Code P0087

Reply Subscribe

Thread Tools

Search this Thread

#21

10-23-2023, 01:12 PM

p_gill

Rock Crawling

Join Date: Dec 2015

Posts: 439

Likes: 52

Received 318 Likes on 249 Posts

Quote:

Originally Posted by UP49802

Ok... So after installing the new sensor there was some slight differences.
Cold start 60psi
2 mins (or so) 55psi
BUT... during mild acceleration the pressure remained at a VERY stable at 55psi
Hard acceleration there was a slight/instant spike to 58 psi but dropped AND held stable at 55psi.
Hot shut down the pressure dropped to 37 BUT actually increased to 38psi - 39psi - 40psi every 90 seconds or so (I would assume from heat soak}? That I didnt notice with the original sensor. I also would assume that rules out the pressure regulator being faulty?
Now... It did seeem to drive smoother especially mild acceleration thru 2nd gear up thru 3rd and 4th. Almost more linear feeling. According to the OEM manual the fuel rail pressure is to be manitained at a stable 55psi. Except for the cold start/fuel temp 60psi situation from what I can find... VERY HAPPY with results!

@UP49802 The new sensor seems to be working exactly as it should. Nice work finding and solving the problem. Your old sensor seems to be erratic and it needed to be replaced. Remember that as the sensor gets old it will provide inconsistent pressure measurements. You will need a little time driving your LR2 for all of the Adaptions to be set for the new sensor. The fuel system is return-less so there is no pressure regulator. Pressure is Maintained by adjusting the output of the Fuel Pump. If the sensor doesn't accurately measure the pressure then the ECU will compensate but the amount of compensation will be limited and eventually when emissions cannot be guaranteed you will get a MIL (check engine light).

Good Luck

Paul

Reply Like