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Refusing to start....

[Vivaro]
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20K views 36 replies 8 participants last post by  Hook  
#1 ·
Hi all, I thought I would throw this out there for some advice, my 1.9Di vivaro since parking it friday after work has refused to fire, codes came back with MAF sensor and fuel pressure regulator which have both been replaced and codes cleared. Still it would not fire, no codes, all sensors have been checked and have good feed and no shorts in loom etc.

Put easy start or such like into the old girl and she will fire but wont run unless you feed her with it. Now it seems to me that this is a fuel problem, without having it recovered to a garage to do the high pressure fuel pump test does anyone have any ideas?
I have to be honest and say i can't find out if this type has an electric fuel pump in the tank or works on vacuum of the high pressure pump, anyone know before I ring the dreaded dealer!

Thanks Guys
 
#28 ·
Well theory is....
The way to check the fuel pressure if you dont have any special equipment, find the fuel rail pressure switch, there should be 2 wires on it, check one for 5 volts with ignition on, then check the other side of the switch with it cranking or running, make sure the 5 volt wire is on the switch, you can do it with both wires on switch, and check for 1.3 volts cranking and up to 4.5 volts when running, if you get about 0.5 volts you have no fuel pressure. You should get 0.5 volts on that signal wire key on engine off.

Its not an exact science but it tells you if you have pressure or not...Fred.
 
#35 ·
Ok all you have to do is put multimeter on low volts scale, put black wire on neg battery terminal, put red wire on switch with switch commented, there are 2 wires one will read 5 volts all the time, the other goes from 0.2 at idle to about 4.5 at full revs if the pressure is ok...or as the man says use opcom and that will tell you the pressure....from Fred.
 
#30 ·
Why not plug opcom in and it will show the fuel rail pressure if the pressure isn't reading then you know where to look something linked to the fuel rail sensor so injector leak back or needle stuck nozzle worn etc, and other sensors it's the best £20 if you own a vivaro I wouldn't 2nd guess,
 
#32 ·
I don't know that much about computers, I have opcom running on win7 I didn't know opcom was fussy about which operating system, someone will know
 
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