Ok i have a r32 with a rb20det a bosch 0 580 fuel pump (i think is a 700hp pump) with a turbosmart fpr (fpr-800)
the car broke down while i was driving tried to start it but wouldnt start as the fuel pump was not working. checked fuse and relay in the boot and was algood so thought it was the pump as i have been running my gas pretty low lately and sometimes my fuel pump would make a different noise which only came on when my gas was really low so thought i had stuffed up the pump. Had a spare walbro 500hp fuel pump which is wayyyy smaller then the bosch fuel pump and installed it. Tried to start after installation and still no fuel pump noise so i checked the other relay where the cap is and found that it was not grounded properly so the fuel pump wasnt stuffed after all..(i know should hav checked it in the first place) pmo. anyway after grounding the relay again fuel pump was working again and car started. I let it idle (to warm up) and after about a minute it just turned off by itself and wont start anymore.
just wondering if anyone who has more knowledge out there could help me out. before i chuck back the bosch fuel pump back in and see if that works?