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DISCUSSION => Engine + Driveline => Topic started by: Ibrahim on October 14, 2022, 06:48:55 PM

Title: Help Car wont start unless cps sensor removed.
Post by: Ibrahim on October 14, 2022, 06:48:55 PM

Hi, I have a 1994 318i automatic that doesn’t start unless I unplug the camshaft position sensor. I thought the sensor was faulty so I replaced it with a new oem sensor. I still have the same problem. Then I thought the DME might be faulty so I also replaced it from one I bought online. Still the same problem. The camshaft sensor connector pins has  continuity with their respective DME pins (16 and 44).I’m stumped and I dont know what to do. Does anybody have an idea for why the car only start without the cps sensor.

Title: Re: Help Car wont start unless cps sensor removed.
Post by: DesktopDave on November 12, 2022, 09:12:53 PM

I moved the topic, you should get a little more visibility here.

Test the sensor resistance between pins 1&2. You should see about 640 ohms. I'd also test the other pairs, you should see very high resistance between them. If the CPS doesn't send a signal to the DME, the fuel pumps are shut off as a safety measure. I'd think that's what's happening in your case.