Results 1 to 9 of 9

Thread: 94 325is no spark/no fuel, testing crank sensor

  1. #1
    Join Date
    Sep 2018
    Location
    Mercersburg PA
    Posts
    4
    My Cars
    1994 BMW 325IS

    94 325is no spark/no fuel, testing crank sensor

    Obd1 car, it will crank fine but no spark or fuel. I was driving and the engie just shit off and never started again.

    I pulled the crank position sensor and the pins in the plug were corroded so I cleaned them.

    now I'm getting roughly the same ohm load across ALL 3 pins when I swap from two pins to 2 other pins. from what I understand I should only be able to get an ohm reading across 2 of the pins, not all 3.

    right now I'm looking at replacing the sensor but wanted a second opinion

    thank you!

  2. #2
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
    Join Date
    Nov 2010
    Location
    Grafenwoehr, Germany
    Posts
    14,483
    My Cars
    16 220i 05 325it 05 M3
    With that car, it is only Pin 1 & 3, a multi-meter set to Ohms and you should get 540 plus or minus 10% IIRC.

    If you are getting the same reading for every pin, they yeah I am willing to say it is bad and needs to be replaced, as the CPS provides the timing data to the ECU.

    I would also check the cam position sensor too.
    Darin
    Current:
    16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
    05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
    05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
    Past:
    95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
    84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
    91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
    82 528i euro Saphire Blue Met/Blue Leather RIP
    79 525 euro Green/Green RIP
    79 318 Silver/Black - The first one that got it all started
    M-Flight Member

  3. #3
    Join Date
    Sep 2018
    Location
    Mercersburg PA
    Posts
    4
    My Cars
    1994 BMW 325IS
    ok thank you Dworthy, that's what I thought, but wanted confirmation

  4. #4
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
    Join Date
    Nov 2010
    Location
    Grafenwoehr, Germany
    Posts
    14,483
    My Cars
    16 220i 05 325it 05 M3
    Also as a side note, do not just buy any ole sensor, for they tend to fail quickly. Best to purchase Bosch, Hella, or Siemens branded sensor, that way you will get a long service life out of it.
    Darin
    Current:
    16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
    05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
    05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
    Past:
    95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
    84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
    91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
    82 528i euro Saphire Blue Met/Blue Leather RIP
    79 525 euro Green/Green RIP
    79 318 Silver/Black - The first one that got it all started
    M-Flight Member

  5. #5
    Join Date
    Sep 2006
    Location
    NW suburban Chicago
    Posts
    16,302
    My Cars
    hiss by my window
    Quote Originally Posted by dworthy View Post
    With that car, it is only Pin 1 & 3, a multi-meter set to Ohms and you should get 540 plus or minus 10% IIRC.

    If you are getting the same reading for every pin, they yeah I am willing to say it is bad and needs to be replaced, as the CPS provides the timing data to the ECU.

    I would also check the cam position sensor too.
    yes, but cam sensor will not cause no start.
    Crankshaft pos sensor is very common failure item and causes no spark no fuel so it's a good bet

    If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue

  6. #6
    Join Date
    Sep 2018
    Location
    Mercersburg PA
    Posts
    4
    My Cars
    1994 BMW 325IS
    dworthy I replaced the crank sensor and she fired right up! yeah I know about the cheap sensors lol... I bought a duralast from Autozone (they are just down the road, had it in stock and I need the car running yesterday)

    so now that it's running I'll go ahead and order a good OEM one and have it on hand!


    So to add to the whole story, I was fighting to get my car in tune for the last week or so (hx35 turbo, 18psi max, ARP head studs, .140" cut ring head gasket)

    After checking the fuel pressure it was wandering from below 40 psi to above 60 psi so I changed the fuel pressure regulator and it fell right inline for fuel.

    The car ran great for two days so I figured it was ready to daily and I pulled my "daily driver" 97 4runner into the garage and cut all the front suspension out to do a strait axle swap.... Well come Monday morning and time to head back to work is when my BMW died leaving me without a daily and just my motorcycle to ride in 30° weather lol

    - - - Updated - - -

    honestly I figured while I had the hood open I'd check both and the cam sensor test out good.

    I left it plugged in, probing the sensor wire while checking voltage and moving a wrench up to and away from the tip causing it to go from 5ish volts down to almost 0 volts

  7. #7
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
    Join Date
    Nov 2010
    Location
    Grafenwoehr, Germany
    Posts
    14,483
    My Cars
    16 220i 05 325it 05 M3
    The reason for checking the cam sensor, if the data is thrown out too much, it will shut the engine down, for the DME thinks it is out of time. While it typically doesn't cause any problems, it is always best to check.
    Darin
    Current:
    16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
    05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
    05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
    Past:
    95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
    84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
    91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
    82 528i euro Saphire Blue Met/Blue Leather RIP
    79 525 euro Green/Green RIP
    79 318 Silver/Black - The first one that got it all started
    M-Flight Member

  8. #8
    Join Date
    Aug 2018
    Location
    Watsonville
    Posts
    12
    My Cars
    97 M3, 97 328i, 95 318ti
    Had a quick question, involving headgaskets.


    A while ago i put new oil and new coolant in my 325i (m50b25) and took it around the block and ran it for it bit to get everything situated. Came back to an Oil Cap milky. This also happened before the oil change and coolant change. No smoke out the tailpipe. No Oil in coolant, Temp. Gauge reads fine, but the block is really hot. Is this a Head Gasket or Cracked Head or just a leaking line somewhere?

  9. #9
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
    Join Date
    Nov 2010
    Location
    Grafenwoehr, Germany
    Posts
    14,483
    My Cars
    16 220i 05 325it 05 M3
    Quote Originally Posted by S.C.B.I.M.M.E.R View Post
    Had a quick question, involving headgaskets.


    A while ago i put new oil and new coolant in my 325i (m50b25) and took it around the block and ran it for it bit to get everything situated. Came back to an Oil Cap milky. This also happened before the oil change and coolant change. No smoke out the tailpipe. No Oil in coolant, Temp. Gauge reads fine, but the block is really hot. Is this a Head Gasket or Cracked Head or just a leaking line somewhere?
    Please start you own thread, as there isn't anything in common with this one, thanks.
    Darin
    Current:
    16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
    05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
    05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
    Past:
    95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
    84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
    91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
    82 528i euro Saphire Blue Met/Blue Leather RIP
    79 525 euro Green/Green RIP
    79 318 Silver/Black - The first one that got it all started
    M-Flight Member

Similar Threads

  1. 88 BMW E30 325i No Spark or Fuel, help.
    By e30rp in forum 1983 - 1991 (E30)
    Replies: 35
    Last Post: 02-02-2020, 09:20 PM
  2. 94 318ic no spark no fuel? ECM trouble?
    By crazyates in forum General BMW Mechanical Help sponsored by RM European Auto Parts
    Replies: 11
    Last Post: 12-24-2009, 08:45 PM
  3. 87' 325i No spark or fuel after t-belt replace
    By cassidy06 in forum 1983 - 1991 (E30)
    Replies: 4
    Last Post: 03-16-2009, 12:39 PM
  4. 87 325i, no spark...how to test whats causing this?
    By Niko1981 in forum 1983 - 1991 (E30)
    Replies: 3
    Last Post: 01-18-2009, 04:34 AM
  5. 89 325i no spark or fuel
    By jefe30 in forum 1983 - 1991 (E30)
    Replies: 44
    Last Post: 08-18-2006, 02:58 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •