So, my BMW (1987 325is) is having pulsing acceleration and stalling problems. The problems began while driving up to school. After driving for a little over 100 miles the engine started pulsing during acceleration. At first it was hardly noticeable, but then it got worse and worse to the point where it completely stalled and left me stranded on the side of the highway. At that point the engine would start after some cranking but only idle for 30 to 55 seconds, after which it would stall. Even while giving it extra fuel. After i got it towed home, i got it to run again after replacing my main, fuel pump and o2 sensor heater/purge valve relays, My ignition coil, and both of my coolant tempter sensors. I cleaned out my mass airflow sensor and my idle control sensor. And i replaced all of the vacuum lines. There may be some vacuum leaks elsewhere but it doesn’t seem to be a vacuum issue specifically. I have replaced the fuel filter roughly 9 months ago. The oil cooler was smashed by the tow truck and my radiator support was a little damaged, The cooler has since been replaced.
After i got my car to run, I drove it and it will drive for about 2-8 minutes before stalling out, during which time pulsing during acceleration still exists and would progressively get worse.
Today i decided to test the fuel pressure. So i de-pressurized the system and put the gauge right before the pressure regulator. However when i detached the line going to the regulator, the line was dry. Which seemed odd. When i tried to start the car, it ran for 30 seconds again and died. The fuel pressure read zero the whole time. After cranking again for a while the engine will not start, and still no pressure.
I tried jumping the pins on the relay to see if the pump would pump anything but it didn't. i tried to listen to the pump to see if it wasn't buzzing and it wasn't.
Does this confirm that the pump is the suspect? Why would the car run and drive for a little while and then after de-presurizing the system would it not even start?
After i got my car to run, I drove it and it will drive for about 2-8 minutes before stalling out, during which time pulsing during acceleration still exists and would progressively get worse.
Today i decided to test the fuel pressure. So i de-pressurized the system and put the gauge right before the pressure regulator. However when i detached the line going to the regulator, the line was dry. Which seemed odd. When i tried to start the car, it ran for 30 seconds again and died. The fuel pressure read zero the whole time. After cranking again for a while the engine will not start, and still no pressure.
I tried jumping the pins on the relay to see if the pump would pump anything but it didn't. i tried to listen to the pump to see if it wasn't buzzing and it wasn't.
Does this confirm that the pump is the suspect? Why would the car run and drive for a little while and then after de-presurizing the system would it not even start?
Comment