97 528i starting problem

[Rome17]

i just changed my ignition cyl , key, and ews on my 528 and it wont start // the motor turns but there's no spark /// does any one know why this might be happening ??? plz .. anything helps!!!!!!

[johnnyBgood]

??? Did you disconnect the battery before you started the repair? If not, check all your fuses.....you might have blown engine controls DME fuses?
johnny,

[Rome17]

ohh thanx ///// and yeah the batt was off / but than we conected the batt and disconected it a couple of times after we were done/// and also when we first noticed the car wouldnt start /// so you could be right !!!! but where are the dme fuses located located ?????

[johnnyBgood]

I would check all your fuses with a 12 volt test light......Engine control fuses on your e39 are in the glove box......#'s 14 & 15 see pics below..... there is also a fuse box in your trunk.....

[Rome17]

thanx bro thats alot of help ill get on it right now and let you know how it goes

[Rome17]

yea , well i checked the fuses and they all seem to be fine but then i saw this online


(The DME and EWS II control module must be synchronized. The DME sends the ISN to
the EWS II module which stores the number for replay to the DME.
• The ISN received from the EWS II module during start-up is compared to the internal
ISN of the DME. The numbers must match before the start operation is allowed to continue.
• The ISN is sent to the DME continuously by the EWS II module with the key on.
• The DME will ignore loss of the ISN after the engine is running.
• The DME retains the ISN information from the EWS II module for 10 seconds after the
ignition is switched off.
Restarting or switching the ignition on within the 10 seconds cancels the key
identification process.)

does that mean that i have to change the DME to mach with the ews and the key ??????

[johnnyBgood]

You are on to something......in my Bentley Service Manual.....it states.....

On EWS II equipped cars, the ignition key is embedded with a computer chip and permanently encoded. A primary code is programmed into the key and into the vehicle itself. A secondary code is changed everytime the vehicle is started. If the key code and EWS II control module code do not match, the engine management control module and the starter are disabled. EWS II ignition keys cannot be duplicated.

The system is designed to have up to 10 keys and only an authorized BMW dealer can provide replacement keys.

NOTE-
It is possible to damage the electronic circuitry in the key, redering it unusable. In that case, a new key should be purchased by an authorized BMW dealer.

johnny,

[johnnyBgood]

Rome17: its got 122k and no the car was runing perfectly fine till some idiot stold the key so my friend instead of ordering a new key from the dealer , went to the dismantler and got the cyl. and key from another 582/// thats when the problem started /// we found out that we needed the ews to mach the key so we got it /// i bought the car from him like that /// but im still havin issues the car will now crank but doesnt start

I just pm'ed you & your original key is coded to match the original EWS II.

So, I think the only way you can fix this issue, is to start over.....by putting back the original EWS II in your car....& then go to the dealer & tell them you need a new ignition lock cylinder....make sure you bring your original ign. key, your vin. # & proper ID....with you.

johnny,