745i wont start
ok this is my 1st post and iv read tons of other post about this . my issue is the car was low on gas, I topped it off and drove off from the pump a few min later the idrive says drive moderate catalyst damage could occur. I puled in to autozone to scan the car and it said misfire on banks one and two . I thought ok no problem I got all new plugs switched them out and went back to re-scan the car it still said misfire banks one and two. I then switched out all the coil packs, o2 sensors (4) of them the fuel pump the fuel filter and it still was saying drive moderate catalyst damage could occur on the I drive. after a few months of sitting I had to replace the battery because I didn't want to have catalyst damage occur so I let the car sit. I switched out the battery and I **** you not the car would run for 10 seconds and turn off I was like WTF!!!!!! at this point I gave up and took it to bemmer tech in Orlando and the hooked the gauge up to my fuel line and its getting the correct fuel pressure they then said it was the fuel filter and wanted several hundred bucks to switch it out and I advised them iv already did it but they told me it was the filter so it was cheaper to tow the car home put on their fuel filter and tow it back .. that's correct tow it back bemmer tech then advised if its not your crank shaft sensor its out of timing and its a costly repair, I looked over at another 745 they had and said its a easy part to check jack mine up and try that sensor off that car sure as s#!t mine was fine so I was like how could my car be out of timing from sitting they said the plastic timing chain guides get old and break with high mileage and one was to check is to take the valve covers off and see if the chain is lose or has scratch marks on the block from vibration and chatter...
after towing the car back home I dedicated the whole day to the valve covers and timing chain ,just to conclude that its not out of timing. I ordered 4 cam shaft position sensors and put them in and now the car runs and drives but is still stuck in limp mode and the idrive still says drive moderate catalyst damage could occur. so i parked the car for a month and now it wont start after becoming a good google mechanic I discovered what's called a eccentric cam shaft sensor they are under the valve covers and cost about $300 each (I didn't replace them yet) I paid another bmw guy to look at it and program any modules that needed to be programed back to the car if needed and figure out why it wont start I seen this bad ass computer scan my care and everything came back 100% fine no errors but the KEY error im like my key sets the alarm locks and unlocks the car and pops the trunk still how can it be the key but because his BMW computer said I needed a new key I went to FIELDS BMW and got a new master key (they only have 10 keys per car after you use up all 10 keys you will need to switch out your computer key dock in the dash and all the locks on your car) I thank god am only on key 6...... well I get my new master key and put it in the dash hold in with my finger for about 15 seconds to program the key to the car and BAM ....... damn car wont start the new key is doing everything the old key did.. ANY IDEAS before I turn it into a parts car?
Last edited by jereme; 07-01-2014 at 11:05 AM.