bmw e30 fuel problem 325i 1986 auto

[indi325i]

hi i have a bmw e30 325i 1986 auto. Ever since i've had the car i get very low mpg. At the moment i fill the tank £55 and i only get about 150 miles. i have changed the external fuel pump, also i think the internal pump has been changed, fuel filter changed
i thinking it could be the lambda sensor?
does any one have any ideas what it could be ?
thanks

[votivequagmire]

I don't know what the other zoners think but it sounds about right for an automatic. Close to 20mpg by my reckoning?

[gooner1]

No idea on your fuelling problem but pretty sure
your car doesn/t have/need a lambda sensor.
Not if its the original engine that is.

[indi325i]

i brought this car last year, it was stored in a garage for 10 years with no one driving it ( every thing is original with the car even has a original bosch car telephone. i've spent about £1000 sorting her out)
the maximum i'm getting is 15 mpg.
its like 50p a mile
im sure i should be getting better mpg
ive also had a new fuel tank installed because the old one had lots of rust in it

For the first 6 months i did have a lot of black soot coming out of the exhaust
should i get the injectors cleaned?
what about a fuel pressure regulator ?

thanks for any help on this topic

[Grrrmachine]

You should always get the injectors cleaned - send them to injectortune.

As for your mpg issues, first thing is to TEST (NOT REPLACE!!!) the blue temp sensor:

http://www.e30zone.net/e30zonewiki/inde ... emp_Sensor

[indi325i]

new spark plug leads
new spark plugs
new blue temp sensor
new distributor cap

soon will be getting the injectors cleaned

[Grrrmachine]

And did you test the wiring before you fitted the replacement blue temp sensor? This is why you TEST stuff, not just replace things.

[indi325i]

yep
the wires were tested too