1999 BMW 540i fuel filter

[x] Cancel search: fuel filter

Page 399 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
Fuel Injection I 
Mass  air flow (MAF)  sensor, 
checking and replacing 
4 The hot film  mass air flow  (MAF) sensor  (arrow) sends a 
varying

Page 400 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
130-1 0 
Fuel Injection 
Remove  MAF sensor: 
Release clips  from air filter housing 
(A). 
Disconnect harness connector (B). 
Loosen intake b

Page 403 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
130-1 3 
Fuel Injection I 
< Unplug harness  connector (arrow) from sensor. 
CAUTION- 
Be sure ignition  is OFF before disconnecting  or recon

Page 404 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
Fuel Injection 
- If idle speed  valve is not buzzing, or  if idle  decreases  when 
AIC is turned  on, stop engine and disconnect  harness  c

Page 407 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
Fuel Injection 1 
NOTE- 
The 1998 5281 with MS 41.1 requires a barometric pressure 
sensor  input signal  for activation  of the 
LDP check.

Page 408 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
130-1 8 
1 Fuel injection Secondary air injection 
1. Secondary air pump  (in right 
front  wheel  housing) 
2. Secondary  air vacuum  vent 
v

Page 417 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
- 
Fuel Injection 
ECM relay, testing 
The engine  control  module (ECM) relay is energized  via the 
ECM  and supplies battery  positive 
(Bc

Page 419 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
Fuel Injection 
A faulty MAF sensor can produce the following  problems: 
Difficult  to restart  when  engine  is hot 
Engine starts  then sta