fuel problem/

[wolves]

i have a j plate 940gl.every few days if the tank is less than 1/4 full and
the reserve light is not lit the engine will cut out.it takes a few minutes
to start,and when it does the emissions light comes on .when the codes are
read they are always:- fuel (bosch)1-2-1(maf sensor signal absent or
faulty). ignition 1-4-4 (load signal from fuel injection system absent or
faulty).when the codes are cleared everything is ok for a few days.the
local garage cleaned the contacts on the maf and i put some silicon
sealent round the plug to keep moisture out, and changed the air filter
,oil and plugs last month, but the problem still occurs.i have been told
by the garage to change the maf but thought to try here first.would
running the tank that low cause the problem?can i do any thing myself to
cure the two problems.also i think i read on a link that all volvo fuel
gagues when they read 1/2 a tank of fuel there isnt 1/2 a tank ,as other
cars would have is this correct?.

 

[Michael Pardee]

i have a j plate 940gl.every few days if the tank is less than 1/4 full and
the reserve light is not lit the engine will cut out.it takes a few
minutes
to start,and when it does the emissions light comes on .when the codes are
read they are always:- fuel (bosch)1-2-1(maf sensor signal absent or
faulty). ignition 1-4-4 (load signal from fuel injection system absent or
faulty).when the codes are cleared everything is ok for a few days.the
local garage cleaned the contacts on the maf and i put some silicon
sealent round the plug to keep moisture out, and changed the air filter
,oil and plugs last month, but the problem still occurs.i have been told
by the garage to change the maf but thought to try here first.would
running the tank that low cause the problem?can i do any thing myself to
cure the two problems.also i think i read on a link that all volvo fuel
gagues when they read 1/2 a tank of fuel there isnt 1/2 a tank ,as other
cars would have is this correct?.

My bet is the in-tank fuel pump is probably not working, but more important
the bellows-type hose that connects the pump to the pickup tube is almost
certainly torn. It is very common and causes the main pump to suck air when
the fuel is below 1/4 tank.

The bellows is part of a $300 US assembly (the last time I priced it), but
can be replaced by a piece of fuel hose with little degradation. The hose
certainly works better than the torn bellows does.

The fuel should be below 1/2 tank (indicated) to get the sending/pump
assembly out of the tank. It is done through an inspection plate above the
tank without dropping the tank.

Mike