Gte nova

[Danny gte]

Hi guys .i have a gte nova that won't start .i have spark but can't get petrol to pass through the injectors when cranking .i can get it to fire if I put a positive and negative from the battery to the top of the injectors one by one and let fuel run in to the cylinders.i have changed the fuel pump really afm dizzyecu and injection loom without success . Has any body any ideas before I loss the the plot lol

[mowgli]

Is it original?
There are so many things it could be. Is the fuel relay ok? And do you hear the fuel pump whirring when you turn the key?

[Danny gte]

Is it original?
There are so many things it could be. Is the fuel relay ok? And do you hear the fuel pump whirring when you turn the key?
Yes it's original I bought it not running it had sat in a shed for ten years .i striped it down for the usual welding ect .new fuel pipe tank out ect .i have checked all the usual stuff earths ect and can't get my head around what's happening

[Danny gte]

Sorry ment to say fuel pump runs for the 10sec or so when you turn on key. Also have a pulse at the injectors ,but lose it when I start cranking.

[mowgli]

You need to make sure the ecu is getting power when cranking. Has the loom been cut? As in an immobiliser etc.

[Andy]

Fuel pipes on the right way?

[Danny gte]

Hi guys thanks for replying ,I have checked the power supply at the ecu all ok ,no breaks in the loom fuel pipes seem to be the right way as the fuel is returning ok to the tank ,and when I swap them I just end up with the one from the pump blowing of with to much pressure . I have fitted a new dizzy as I thought it could have been the hall sensor but it makes no difference .i have changed all the injectors ecu airflow meter and injection loom from a mates car who converted to 40s and still no luck ,really has me confused .any suggestions welcome as I really want to stay injection

[therealnovaboy]

have you got an earth from the ecu. the ecu will need to switch each injector to earth to make it open. It could be pin 5 on the fuel ecu (should be a brown wire to earth). 454 on the wiring diagram

[Danny gte]

have you got an earth from the ecu. the ecu will need to switch each injector to earth to make it open. It could be pin 5 on the fuel ecu (should be a brown wire to earth). 454 on the wiring diagram
Have just checked pin five. have earth there ran a earth to battery along side earth on pin 5just to check ,still nothing .i take I am right in saying the only thing that tells the injectors to pluses is the dizzy and the ecu ????

[therealnovaboy]

Have just checked pin five. have earth there ran a earth to battery along side earth on pin 5just to check ,still nothing .i take I am right in saying the only thing that tells the injectors to pluses is the dizzy and the ecu ????

yes the hall sensor and the ecu. however the cam position signal to the ecu comes from the flow meter (timing ecu). The cam position sensor is connected to the flow meter. so the fault could be a bit more complicated.

try the same with pin four. pin 5 looks like the dirty earth since the screens are connected to it. sorry never saw pin 4 yesterday.

Prove the ecu isn't switching by fitting a volt meter between pin 3 on the ecu and the +on the battery you should see the volts bounce about when cranking. if its is bouncing about I assume you've got a loom fault to the injectors.

[Danny gte]

yes the hall sensor and the ecu. however the cam position signal to the ecu comes from the flow meter (timing ecu). The cam position sensor is connected to the flow meter. so the fault could be a bit more complicated.

try the same with pin four. pin 5 looks like the dirty earth since the screens are connected to it. sorry never saw pin 4 yesterday.

Prove the ecu isn't switching by fitting a volt meter between pin 3 on the ecu and the +on the battery you should see the volts bounce about when cranking. if its is bouncing about I assume you've got a loom fault to the injectors.
Thanks I will Check it out when I finish work

[Danny gte]

I have just checked the back of the ecu plug pin 3 no wire going into plug but I when I put the meter in and crank Iget 0.4 of a reading .i got a good chance to check all the voltage going to all plugs and can't seem to find my switch live .i have permenent live on no 12 any ideas are welcome .thanks

[therealnovaboy]

I have just checked the back of the ecu plug pin 3 no wire going into plug but I when I put the meter in and crank Iget 0.4 of a reading .i got a good chance to check all the voltage going to all plugs and can't seem to find my switch live .i have permenent live on no 12 any ideas are welcome .thanks

2 + 12 is the switched live from the relay. 3 should be connected to the injectors. try putting your volt meter across the injector plug and see if you get anything there when cranking. If you don't have a wire from 3 on the ecu then chances are you wont see anything. Also test each side of the injector to earth for 12v to prove the +ve side is wired correctly and you have 12v to the injectors. I think you do because you said it started when you linked the Injector to -ve and it started?

I suggest you have a look at the loom for the injectors and try and track down the wiring.

Do you have a wiring diagram? itll help to trace the wire colours.

[meritlover]

One side if the Injectors should have a 12v supply when the FP relay in on. The ecu pulls the injector to earth to squirt. If you het 12v on both sides of the injector circuit, the fault is between there, the ecu and ground.

[Danny gte]

Thanks lads I will try and get a look oveR the weekend ,have being on shifts and am trying to work on car between shifts .realy getting frustrated ,but your advise has being a help .feel like I getting that bit closer to driving a nova again .

[NitrousVaux]

Just a little suggestion. I once had a great engine which was stored outside for quite a while and had a real struggle to get it started. Ended up towing to a tuners and they found the injectors were so blocked that no fuel would pass unless on high pressure or cold start. Maybe if the wiring proves to be clear and you are still struggling maybe good thing to check next. Loads of vids on YouTube to diy clean them to see if that helps then get them cleaned professionally.

[Danny gte]

Hi guys have tryed al the suggestions and no luck,finally gave in to day and took the car to an auto spark .hope to here back from him in a couple of days ,so I update you if he fines the fault .thanks again for the help

[meritlover]

What did you have no luck with?

[Danny gte]

Hi guys sorry havnt got back to use in a while . The autosparks managed to get the car going . Part of the injection loom had corroded and shorted out the injector plugs . Car is now running but won't idle below 2000rpm . Any ideas???

[mowgli]

Look at the Cts, and icv

[meritlover]

air leak or missing vacuum tubing

[Danny gte]

Hi guys,finally got the car running right, when I was checking over the car for the electrical problem I had took the injectors out to see if they were spraying ,when putting them back in one of the o rings had came .this was letting the engine draw in air and over rev .once I replaced the o ring and rebulld the injectors and loom the car fireed and idled like a brand new car. Just need an mot date now and then it's time to relive my youth .lol.thanks again for the advice