Fuel pressure

RTAuto8376 · Post by **RTAuto8376** » 20 Aug 2021, 17:04

Working on 2005 S60 2.5T. car runs fine for a few miles then starts to miss and buck and sometimes stalls. Scan tool showed loss of fuel pressure. Replaced fuel pump fuel pump control model ,fuel filter, and fuel rail pressure sensor. Have cleaned all grounds I could find and replaced body to engine ground. Removed ECM and cleaned contacts all to no avail. ECM throwing two codes. Faulty fuel pressure signal and fuel pressure signal low. Any suggestions?

Post by **cn90** » 20 Aug 2021, 21:45

- How many miles?

- Measure the actual fuel pressure (via the Schrader valve) and report back...

RTAuto8376 · Post by **RTAuto8376** » 21 Aug 2021, 04:57

87K miles. I have done that also. Same results

TomMills · Post by **TomMills** » 23 Sep 2021, 23:51

I have a similar issue. 2006, V70 AWD, 235 000km. Replaced same parts as you. Both my OBD reader and fuel pressure gauges read 294-310kPa (normal), even while driving. The car drives perfectly until it doesn't. At a point while trying to accelerate, it misses, stumbles, and, if I'm not quick to back off the accelerator, will shut down. I can slowly get back on the throttle and it struggles on. If I shut it off and let it cool down, it will fire right up and behave until it doesn't. The most frequent DTC is 089 (Fuel Pressure Sensor). It appears to me that the problem is heat related. This suggests either an ECU or CEM cooling issue. They are both too expensive to just guess at replacing (or having rebuilt/reflashed). Thoughts?
RTAuto, do you think your issue is heat related?