Member
Is there a fuel relay in this car if so where's it at. I was told to replace camshaft exhaust and intake sensors. Still wont start.
Jbird
There is but I have not found it I think it's behind the glove box. Is the engine turning over when you start it if it is , have some body wack the passenger side of the gas tank on the bottom with a rubber mallet while you try to start it if the engine starts then dies its the fuel pump, hell. it might stay running
Member
The tourings have relays in the right rear subwoofer area, above the battery.
What error codes do you have? What symptoms? Do you have fuel pressure at the fuel rail? There is a Schrader valve on the rail to check the pressure. Pressing the pin down is a quick way to see if there is any pressure at all. If you have some pressure, the fuel system is probably OK.
Why do you think that replacing the camshaft sensors will help? They do occasionally go bad, but rarely together, and they shouldn't keep the engine from running. The crank position sensor is the critical sensor.
Member
I have no fuel at the rail in the morning but when I get it started its ok, so when I took to the mechanic it was running so he had me get the sensors, and the fuel filter and fuel pressure regulator.
Member
If you have fuel pressure while running but the pressure quickly drops when shut off, suspect a leaking fuel injector. That's more likely that a leaking check valve in the pressure regulator or fuel pump.
The two cam position sensors will raise an OBD2 error if they are not working or are producing marginal/irregular signals. There isn't a reason to replace a cam sensor unless a persistent error is reported, or there is a repeated intermittent error.
Last edited by djb2; 12-30-2017 at 12:00 AM.
Member
Any luck on this?
"If it was easy, everybody would do it!"
2002 525i Wagon, Silver with piano black accents on black interior
19" F10 M-Sport wheels
Member
Check this video. I had exactly the same issues as you. Just did this fix yesterday and now it starts right up. Hope it helps.
https://www.youtube.com/watch?v=0eUVF6OLFFg
- - - Updated - - -
You can follow my thread on this same problem here. Good luck.
https://www.bimmerforums.com/forum/s...s-Runs-perfect
"If it was easy, everybody would do it!"
2002 525i Wagon, Silver with piano black accents on black interior
19" F10 M-Sport wheels
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