F15 30d suddenly stopped in traffic.

[teknix]

Hi Guys 

           I have owned this 2016 ex police F15 30d for about 6 months.

I purchased it as a none runner the car had been driven into a river

and the water went into the air in take and locked the engine.

I removed the head cleaned the bores enough with 400 wet and dry

and loads of WD40 until i was able to turn the engine from the fly wheel.

then i glaze bust all cylinders with a glaze buster until all the rust was

removed. Rebuilt the cylinder head cleaning all the valves, replaced

the valves seals. After I put it all back together and replaced to starter

it started and run as sweet as a nut 🙂 until today, for some strange

reason while in traffic the engine turned off the gearbox went into

park and it would not start,,, the message on the dash said,

"starter or ignition fault engine can not be started contact BMW"

has this happened to anyone here? my diagnostic is showing 1

fault being that 1 glow plug is not the same as the rest!

I have since put a booster jumper pack on the jump terminals under the bonnet

and it started with the message "batteries discharged start engine"

but the batteries are both fully charged!

any ideas? Im confused but do not want to have it happen again.

since starting it with the booster its been as it was before this happened.

strange very strange. please any suggestions would be gratefully received.

thank you   

 

[teknix]

this problem happened over 5 hrs ago but now  have just been 

out and it started as normal no issues ? time is 10.25 pm,

strange.

 

[teknix]

Im thinking maybe i have a bad earth problem somewhere.

any ideas?

 

 

[Greydog]

Morning Terence

Welcome to the Forum

Well done on the salvage and rebuild job, once water has got into a loom it can take a long time to completely dry out and it can pull water up by capillary action and pins get corroded. So I think you may well have a long job ahead slowly checking and cleaning connectors, you are quite right about the earth points BMW love Comb type earth points when checking cleaning those I would dismount the unit and clean its contact point and bolt I use electrical contact paste from RS Components when reassembling.

Stop Start systems are another thing to check, plus are the batteries correctly registered and charging correctly, is the alternator putting out the correct charge? Just thinking out loud here. One of my Merc's suffered dying battery syndrome Dealer fitted 2 under warranty turned out to be a failed diode in the voltage regulator allowing current bleed back when the engine was off?

Good Luck

Dave

[teknix]

Hi Dave thank you for your reply. i was expecting some problem regarding the wiring 

as i keep getting random faults show up as intermittent but at random times without

any symptoms. i feel i have a long haul task ahead of me to find the faulty connection

but in my mind it must be an earth problem.

thank you for your interest.

I will keep you all informed what and where i find any bad connections.

ll the best Tez