Question about 1986 Volvo 760

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Volvo 1986 760 turbo fuel injection

There is fuel going to the rail, but there is no fuel going into the plugs. Also the injectors are firing. What is the solution to the problem?

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At the end of the fuel rail, attached to the front of the engine, is the FUEL PRESSURE REGULATOR. check to make sure that the vacuum hose attached to it is TIGHT. If this regulator is not functioning---replace it.

You may have to do a fuel pressure test to ascertain the correct pump pressure and function of your high pressure undercarriage pump. At lower than OEM pressure, the injectors will not open, even with fuel flowing through the rail.

Posted on Mar 26, 2009

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Posted on Jan 02, 2017

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That being said, either the fuel injection controller has failed, or there is a problem with the wire leading to the injector, or there is an obstruction in the fuel rail preventing fuel from reaching the injector. Use an circuit tester to see if the injector is regularly receiving a pulse. If it is not, you have a wiring issue or a bad ICU. If it is getting a regular pulse, you have an obstruction in the rail (or you still have a clogged injector).

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there are 4,.6 and 8cyl. diesels by Isuzu.,
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European and Asian buyers could opt for the diesel engine option of the 4JG2 3.1-liter (later superseded by the more problematic 4JX1 3.0-liter of 159 PS or 117 kW)
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learn what's under that hood, then fix it?

what country
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Getting fuel to throttle body, but, car will not start. Fuel injected system. Injecters are not firing. Starts when gas is poured in throttle body then dies. What's my problem?


Sometimes there is a fuse just for the injectors if none of the injectors are firing id check the fuse.
But first check to see if the fuel injectors click because if they do click it could be the fuel pump.
Are you able to figure out what the fuel pressre is at when you prime the system? You can do this by checking the schrader valve on the fuel rail by plugging in a gauge and see if it has pressure when you turn the key.
if the injectors dont click and you have fuel pressure check the fuse for the fuel injector system (depending on model fuel injector system.) Cause you need to first make sure the fuel injectors arent firing cause it may be a pressure regulator problem or a fuel pump.
if you need further assistance or have a question about anything ive said please follow up with a comment and i will be glad to assist you further from there. Thanks and good luck.

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