I HAVE A 1986 bmw 735i 186,000. mi. # wbafh8409g097396
My very reliable BMW started to stumble after a 5 minuit drive,then the engine sputtered and stoped.
I ,tried several times to restart it and the engine would make a sound like the spark was occuring out of synch. there was a smell of gasoline at the tailpipe. I walked home and the next morning It started fine on the first try, however as soon as the engine was warmed up, it choughed out. and would not restsrt untill the following morning.
I guessed the coolant temp sensor was bad ,and replaced it.
But no luck....the car will not run when hot.
Any thoughts would be appreciated.
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You can usually find them on eBay for a reasonable price. Here is a very complete one for only $40 http://www.ebay.com/itm/1986-BMW-735i-owners-Manual-86-5-bookset-plus-CASE-/350009910083?hash=item517e376343&item=350009910083&pt=Motors_Manuals_Literature&vxp=mtr
Does does she start with jump leads from another car? If so, with the engine off, check the battery voltage (less than 12.2 volts e.g. 10.1volts = dead cell: 12.2 volts = flat battery; 12.5volts charged battery). Check for performance - put all main lights on, should be no change after 5 minutes if healthy. With the engine running the voltage across the terminal should be about 14 volts. Whilst still running switch on all the lights and the voltage should climb to 14.5 volts. These last two tests show that a) the alternator is working and b) it is responding correctly to power drain.
If the car fails to start; check main fuse and starter relay; check all battery leads for tightness of fit; check the engine block to chassis earth cable; check the starter motor terminal for absence of corrosion. Remove starter motor/starter solenoid combination and examine the state of the electrical contact striker plates. If worn badly these will need to be replaced. wipe and brush things clean but do not lubricate anything, the oil only serves to attract dirt that clogs everything up eventually
Hello. The BMW company has one of the most inclusive maintenance schedule of all. The BMW Maintenance System has been devised with the following objectives: maximize vehicle safety, reliability, and minimize breakdowns resulting from wear, at minimum cost. The Service Interval Light system will indicate when you are due for service based on your driving habits. In addition, there are recommendations for specific mile intervals. The answer to your question is that is all of the recommended maintenance has been occurring all along, the 180000 mark requires the extensive INSPECTION 1. Any BMW dealership will print you off the entire checklist for the asking.
Before you make any other moves, I would try having the transmission flushed and refilled and filters changed and if that doesn't work, you may have burned out the modulator so you may have to shop around for another transmission or have that one rebuilt, whichever would be feasibly financial for you.