No start

["Trevor Turner" <ytt105@xxxxxxxxxxx>]

Hi

Let me tell you a little story..

I have had 3 E23, 735i's which have all had similar problems.

On the first car I replaced the ignition switch with a second hand one 
and it fixed the problem for about 6 months. I then installed a relay 
into the starter circuit to take the load of the switch. MAJOR 
MISTAKE!!!

The car started well but finally had to be taken to the mechanic when it 
started producing stacks of black smoke.

The mechanic spent a week R & R 'ing just about everything, Cost me 
A$1,000 for his labour, but he finally found the culprit.

My $5 relay. Apparently the computer is powered from the starter 
circuit, after the voltage is dropped to about 3 volts. My relay was 
causing the computer to run at 4 times the intended voltage, hence 4 
times the fuel. They must be built well though as it didn't blow up.

To fix my starting problem I ran an additional wire from the ignition 
switch to the starter solonoid, and have followed the same procedure for 
the following two cars. (I don't mean I put in a relay and paid my 
mechanic heaps of money to remove, just that I added in an extra wire. I 
may be DownUnder but .....)

No more problems.

Good Luck


Regards from DownUnder
Trevor Turner
Canberra Australia
1986 735i BMW
1976 Alfetta 1.8 sedan
1967 Alfa Guilia Sprint GTV


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