QuestionI appologize, since your last response I double checked both the speed and reference sensor and one comes up 1.01 and the other is 1.4. the meter is set to 0L. The 7.1 is what I'm getting off of the new ignition coil, the old one is reading 5.4. I appolagize for the confusion, I'm not a good mechanic. With this new info are you still pointing to the sensors?
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the vin # is WBAAB5402G9670397, it is a 325es with the onboard computer with(time/date,temp,etc). The ohms reading on both the speed and reference sensor were right about 7.16 ohms. I just rolled 250,000 miles. I know it's a lot but it was a graduation present that I'm just not willing to part with, especially after dropping as much money into it that I have allready. I appreciate any help you can offer!
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I have tested the coil, as well as the wires to the coil with an uhm meter and everything is fine. I have also tested the speed and reference sensors with an ohm meter and they are working properly. I was also advised to check the ignition shutdown relay and it checks out good also. I'm out of things to check and replace, I was told the ecu wouldn't be bad if that is the only problem that is showing, is that correct? Any other suggestions?
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I have a 1986 bmw 325es that wont start. It cranks but wont turn over. I've replaced the distributor cap and rotor, the plugs and plug wires, the ignition coil, and the crank sensor. I've tried spraying starting fluid into the air intake and nothing. I'm getting power to both the hot and negative wires on the coil when turning the key. We've traced the wire down to the crank sensor and it's working, I'm not getting spark off the wire running from the coil to the distributor cap. So, what could the problem be? I've also checked the Reference, and speed sensors that are in the botom of the trasmition and they seem to be fine. I'm unable to get help from anyone else, so if you could PLEASE help me I would greatly appreciate it. It wouldn't start after parking the car and it sat for 3 days. I've had problems with it not starting in the past, but it always starts on the second try. It has been stalling out while driving, even while in gear, but it always starts back up. Not until this time has it never started. So, PLEASE help me!
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Thomas,
I have the basic problem in my head of whats happening to your car. I do have some questions though:
Do you know for sure that the new coil is good? You can always take 5 minutes to try another one off of a different car (doesn't have to be a BMW).
If the coil is not firing, then it's not being told to do so. Have you tested the wires going to the coil?
Personally I would suspect those transmission sensors again. I have never had a problem with them, but I do know people who have. One gentleman wanted to sell me his car because he could never fix it. I didn't need/want the car, so I told him what to do to fix it. It was, in fact, those reference sensors on the bell-housing of the tranny.
I would check them again, as they should produce similar symptoms to what you are having.
Good luck,
Josh
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You have been sent to me,(Don Berlan).I have read your question and the answers that have been given.I have a few questions though before I can help.Having the VIN number would be helpful.It is a 325es correct?Does it have the on board computer(time/date,temp,etc)You had mentioned that you checked the reference sensor what was the ohms value?These question come to me,I would need this information for me to help.It'll be an easy fix I'm sure.I know you have said the sensor was working but if it was there would be spark.Is the car an automatic or standard transmission?How many miles are on it?I would like to help...Its a BMW
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Well from what you just told me the sensor is bad as the reading should be about 960 ohms.Try a new reference sensor.That is the one that has the gray wrap on it.
AnswerPlacing your ohm meter on the yellow wire and the black wire on the sensor you should read 960 to 1.1k ohms.I have another task for you,it is hard to see but with the sensor removed you should (with a light)be able to see the pin that goes in the flywheel.I have seen the pins fall out which means you would have tohave a new flywheel.Look for the pin.
Have you ever played with the on board and accidently hit the code for the security system to alarm itself?This will shut the ignition off.Keep me informed.Again look for the pin
