Vn v6 not firing?

[NOT 38]

Hey guys i recently done a fuse box relocation and battery relocation. just tried to start it up today and i cant get it to fire or kick at all. its got plenty of spark and getting plenty of fuel, so could it be a lack of injector pulse?. if so how do i check.

[bobby_wayne]

With a node light, it plugs straight into the conector that goes on the injector and flashes when you wind the car over. You can also do this with a test light. Pull a connector of an injector, earth the test light to the chassie or good earth point, get some one to wind the car over and touch the probe on 1 of the wires on the connector, if it doesn't flash probe the other wire beside it on the connector. You know it has pulse when your test light is flashing with the fireing order. wind the car over for 10 seconds each wire. if you see no flashes on your testlight you don't have injector pulse.

[NOT 38]

cool thanks mate. would there be anything wrong with the dfi or crank sensor? its getting s buttload of spark.

[bobby_wayne]

No, if the crank sensor was cactus you wouldn have spark

[bobby_wayne]

if you have spark and nothing is blocking the intake from getting air the sounds like your fuel pump is cactus. have you pulled a fuel line that feeds the fuel rail off and turned the key on and off to see if fuel is actually flowing? if so, get a line clamp or vice grips and crimp the return on the fuel rail where the pressure regulator is and try start it. If the regulator is cactus then you won't have fuel pressure in the rail to fire the injectors.

If you don't have vice grips get someone to crimp the return line with pliers. Wrap a rag around whatever you use so the fuel line doesn't split.

if this still doesn't work,

Has to be a problem in one of your relay's, like the Main engine relay or something like that....then it gets technical.

[bobby_wayne]

Here is a site worth checking out if you don't have access to a scan tool. The conector is in the LHF Kick panel on the side of the footwell. Bridge Terminals A + B with a wire and turn the ignition on. The engine light will flash the DTC's in the ECU

ALDL Information for the VN & VP Holden Commodore

[NOT 38]

yeah its getting a shitload of fuel. i installed a surge tank with a 044 running off it throug -8 lines all brand new. i disconnected the fuel line and primed the pump. its safe to say it was pissing out fuel. also pulled out a plug and tried every plug lead for spark, its also sparking so no problem there.

[NOT 38]

is it possible that a knock sensor would prevent it from starting, also i think i might of broken the oil pressue sender putting it back together, if its not reading any oil pressure would that not let it start either ?

[bobby_wayne]

no. even with no oil pressure it will still fire. what about a compression test? if you don't have a guage just turn the engine over by hand with the plugs in. it should be hard to wind over in 2 places this is a dodgy way with out a guage.

[NOT 38]

nar its got plenty of compression

[NOT 38]

is it possible that a couple of the sensors could have a bad earth ?

[NOT 38]

ok guys its got injector pulse and the injectors are working fine. WTF esle could it be

[Brett_jjj]

It sounds like it could be low fuel pressure.Even though it still flows ok,its gotta be above a certain pressure for the injectors to work...

[NOT 38]

hey i bought a screw in fuel gauge for my sard fuel reg today. fitted it up and adjusted it all the way down (max pressure). then primed the system and it primed upto 60 pound then the pressure dropped dramatically down to only 20 pound. the base pressure when it was tuned was 48 pound. i adjusted it back to about half and still done the same thing. could the regulator possibly be rooted ?

[Trent_G]

hi my vp commodore isnt starting i replaced the fuel pump the ecu computer and the crank angle sensor and the coil pack and its still not starting some one please help me asap

[NOT 38]

is it getting fuel and spark ?. have you touched the oxy sensor at all ?

[NOT 38]

problem fixed.

[Brett_jjj]

problem fixed.

Well what was the problem and how did you fix it,it might help someone else out who has a similar problem..

[NOT 38]

sorry posted what it was on another thread. turned out to be the plugs of all things. out of all the wiring ive done through out the whole car. i got the 02 sensor wires round the wrong way lol. beacause it wasnt working it fouled all the plugs. every single one of my irridium tips lol. so i just chucked some cheap ngk's in there and bingo it started. fuel pressure was way to high aswell might of been a contributing factor