yorkshirekowboy 19 1 Cars Posted January 15, 2008 hello. right im getting a spark at last on my mi16, it turns over, but my fuel pump isnt engaging, so maybe thinking its the crank sensor. is there anyway of testing it on a mulitmeter? ive searched but nothing. thanks ps, my crank sensore is a metal steel one, the ones ive seen in the past are black plastic. i also have the problem of wondering if i have connect this sensor to me throttle body sensor as they have both the same size three pin connector. the crank sensor meant to be connected to the plu where theres a red, black and earth? Share this post Link to post Share on other sites
jackherer 543 Posted January 15, 2008 If you're getting a spark the crank sensor is fine. Check the connections to the fuel pump relay. BTW Metal crank sensors are original equipment (Bosch) the plastic ones are pattern parts. Share this post Link to post Share on other sites
Tom Fenton 1,548 Posted January 15, 2008 You can test the crank sensor by connecting a multimeter set to AC mV across the terminals, and then crank the engine. If it is working you will see a mV signal, if its dead you will see nothing. But as above, if you have a spark, it is working. Share this post Link to post Share on other sites
yorkshirekowboy 19 1 Cars Posted January 15, 2008 If you're getting a spark the crank sensor is fine. Check the connections to the fuel pump relay. BTW Metal crank sensors are original equipment (Bosch) the plastic ones are pattern parts. ok mate cheers, only getting a slight sparlk thou... Share this post Link to post Share on other sites
jackherer 543 Posted January 15, 2008 ok mate cheers, only getting a slight sparlk thou... Is it sparking repeatedly (but weakly) or just once? If its repeatedly sparking the crank sensor can definitely be ruled out, in which case move on to the fuel pump relay and the fuse for that circuit. If they are OK check the fuel injector relay. You can test the crank sensor by connecting a multimeter set to AC mV across the terminals, and then crank the engine. If it is working you will see a mV signal, if its dead you will see nothing. Thats a fairly basic test, although I agree it will catch most CPS faults. However you could still see a small voltage generated but it could be a very noise signal that can't be accurately deciphered by the ECU. The only conclusive test method requires an oscilloscope. Share this post Link to post Share on other sites
