Can crank sensor cause car not to start?
Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW 5 Series
Forum Discription: This forum will deal with any issues on the BMW 5 Series (E12, E28, E34, E39, E60 & E61)
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=40444
Printed Date: 26-April-2024 at 05:10
Topic: Can crank sensor cause car not to start?
Posted By: L8RNS
Subject: Can crank sensor cause car not to start?
Date Posted: 26-February-2008 at 22:02
|
HI MY CRANK SENSOR WAS DIGNOSED FAULTY A MONTH AGO IT WAS HAVING PROPBLEMS STARTING BUT NOW I TRY TO START IT IT TURNS OVER FOR AFEW SECONDS THEN MAKES A ZZZZZZZZ NOISE THEN I KEEP TRYING TO START AND IT KEEPS HAPPENING?THEN EVENTUALLY AFTER 10 MINS IT STARTS. ANYONE HELP? |
Replies:
Posted By: L8RNS
Date Posted: 26-February-2008 at 22:17
| OH AND I HAVENT REPLACED THE SENSOR YET,IM JUST VERY PARANOID WITH THIS CAR BECAUSE IT SEEMS TO ME THAT A SENSOR COULDNT GIVE ME THEESE OUT COMES. |
Posted By: < FORZA WEST
Date Posted: 26-February-2008 at 22:23
|
The crank shaft sensor is needed for the firing order reference.If the signal fails it cant start. ZZZZZZZZZZZZZZZz no idea |
Posted By: L8RNS
Date Posted: 26-February-2008 at 22:26
| SORRY LOL OK IT SOUNDS LIKE YOU TURNED THE HOOVER ON AND THE TICKING OVER HAS STOPPED.I HOPE THATS BETTER |
Posted By: jetsetwilly2000
Date Posted: 27-February-2008 at 14:37
DOES YOUR KEYBOARD HAVE A CAPSLOCK KEY?  what car is it? The zzzz/hoover noise - could it just be the starter motor winding down? had endless trouble with my E34 a while ago, turned out to be a failing alarm/immobiliser. The CPS showed a fault but was not to blame, but in theory it certainly could be the CPS. The takehome message unfortunately is you have to start investigating - I'd start with listening in the boot for the fuel pump, then changing the fuel filter (cheap and easy tests). Best of luck! ------------- E90 M3 DCT, E46 330d Touring, VW T5 wannabecamper Previous: Disco 3 TDV6, 2x E34 540i6, E34 535iS |
Posted By: stheaney2007
Date Posted: 27-February-2008 at 21:35
|
yes mate definatley, i had an e30 325i, when i tried to start it would wind and wind, when u take the HT lead off one of the plugs and hold it to the head it wont spark, this is the the crankshaft sensor.....thats what mine was!!! ------------- Current : BMW e36 328i Coupe, Angel eyes, Lowered, Leathers Previous : E34 540i, 525i, 535i, 518i, E30 325i, E30 316 |
Posted By: < FORZA WEST
Date Posted: 27-February-2008 at 23:15
|
Thats probabely the secondary air intake system firing up,runs for about 2 - 3 mins during warm up phase. They become noisy and sound just like a hoover. |
Posted By: thepits
Date Posted: 27-February-2008 at 23:42
|
L8RNS - please don't shout
lookie here...... http://www.bavarian-board.co.uk/forum_posts.asp?TID=10&PN=1 - http://www.bavarian-board.co.uk/forum_posts.asp?TID=10&P N=1 Thank you. ------------- Cats know your every thought. But don't care. |
Forum Rules and Guidelines wrote:Posted By: 540 V8
Date Posted: 29-February-2008 at 12:04
|
Failed crank sensor will cause the engine not to start. The control unit needs to know what position all the cylinders are at so it can send signals to the rest of the systems that run the engine. Without knowing this basic information the engine has no way of running. Mike ------------- 
Current:E34 540i Touring 6 speed manual(Mpower bodykit & suspension)& Chrysler Voyager 3.3 V6 auto Previous:E34 530iSE AC Schnitzer suspension. E28 525e auto-Standard |
Posted By: Cambell
Date Posted: 29-February-2008 at 16:27
|
My E39 had the crank sensor go, caused intermittent starting and then failed while doing 50MPH (not a good feeling) Just change it mate, only a few £££s from ECP ------------- |
Posted By: L8RNS
Date Posted: 01-March-2008 at 14:43
| thanks guys i had the crank sensor done and WOW it has made a big diffrence in drive,gearchange and starting.the wind noise was the starter motor but its ok now that i had the crank done.thanks guys |
Posted By: 540 V8
Date Posted: 03-March-2008 at 20:29
|
That's what we are here for! Mike -------------
Current:E34 540i Touring 6 speed manual(Mpower bodykit & suspension)& Chrysler Voyager 3.3 V6 auto Previous:E34 530iSE AC Schnitzer suspension. E28 525e auto-Standard |
Posted By: bmr4evr
Date Posted: 10-May-2008 at 08:32
congratulations! did you replace both crank sensors (intake and exhaust), or just one of them? to all experts in this board, i replaced my intake crank sensor only and the car was fine for a week, but now it seems like i am having the same problem again. did the exhaust sensor just failed, or maybe i didn't do a good job installing the new one? thanks, any help would be appreciated! |
Posted By: kbannon
Date Posted: 10-May-2008 at 09:49
|
There is only one crank sensor!
------------- Current: 2009 E60 520d "Sport" tractor Previous: 1989 E30 320i SE 1997 E39 523i 2003 E39 525i Sport Individual |
Posted By: bmr4evr
Date Posted: 11-May-2008 at 06:42
hmmm, maybe i got myself confused between crank and camshaft... an auto-part store employee told me that a camshaft position sensor is the same as crank position sensor. we were discussing code P0340 which stated that "the camshaft position sensor is monitored for error" for my car. i expressed my doubts that they were the same, but he insisted that they were. so are they really not the same thing? sorry, if this question sounds dumb... and thanks for clarifying... |
Posted By: kbannon
Date Posted: 11-May-2008 at 09:47
|
My 523i has only one cam sensor also
------------- Current: 2009 E60 520d "Sport" tractor Previous: 1989 E30 320i SE 1997 E39 523i 2003 E39 525i Sport Individual |