Need Help With R32 Gtr Starting Problems

[ECCE]

Ok guy's i need some help, after being unstarted for about 12 months my r32 gtr is having a bit of trouble coughing back into life. After a rebuild its ready to go apart from the obvious problem of not firing, heres what has happend so far and all of this is since she was last driven before a part stripdown for paint etc, ok the wiring in the rear half of the car was removed very carefully and put back in after painting, fuel tank was removed, cleaned and flushed and put back in, dash was out but loom stayed in place, oil change and 10 litres of 98 and a new fuel filter were all put in, cranked with no start.

what i know...

1. I do have a spark, plugs were pulled and earthed and were producing a good spark.

2. Ecu is good, took it out and put it in a friends gtr, ran fine, actually better than his, ( he was a bit pissed off lol)

3. I have 50lbs of fuel pressure, plenty i'm told.

4. injectors were removed and tested, all 100% fine and clean.

5. I have fuel in the fuel rail.

6. I have 13 volts at the battery.

7. I Have looked at all the fuses in the car, and they are good, relays i do not know how to test.

8. When it was at the painters, they were trying to get the drivers window down using a spare battery and wires, whilst doing this there was a small spark as wires touched a plug in the door(mirrors plug or window plug) , i do not believe this to have created the problem , but guess it could have upset a relay or fuse???

9. When the plugs were out we looked at the top of pistions after cranking and there was absolutely no fuel in there, dry as a bone, so maybe the injector pulse???

10. earths have been checked in painted areas.

11, i love my Car, would really like some help here guys

Thanks

Edited September 21, 2007 by ECCE

[Godzilla32]

You sound fairly cluey. So this may sound silly but, you need 3 things.

A good strong spark - Use a spark tester to check strength or a screw driver holding it close to earth to see how long it will jump (careful you dont shock yourself!)

About 300kpa of fuel pressure - Use a noid light or multi meter or test light to check for injector pulse.

Decent compression - Check with a comp guage and look for about 150+ psi

Hope that helps,

Deren

[ECCE]

Hi deren, sure its the injectors pulse, or related to that

what about a relay, which is the eccs relay?? near the ecu??

hows your rebuild going? i know what thats like....

hope you saved the window seals unlike me.. get ready for a heart attack

monster 4000hrs and counting total rebuild.. but car not co-operating. lol

Edited September 21, 2007 by ECCE

[blind_elk]

50 psi fuel sounds too much. Should be around 40.

If you have spark, then the ECU is working. Have you tested the injectors in a tester, or still connected to the loom?

And you have compression?

[ECCE]

Hey guys, well the car last drove about 12 months ago, a went fantastic, so i would find it hard to believe it is a compression prob, have just got some "blazt software", you guys ever use this? looks pretty easy, hopefully will throw out a fault code, so relays anyone??? ecce relay?? is that next to ecu??? colour???

[Godzilla32]

See if you can find the workshop manual. If will tell you how to run a diagnostic on the ECU without any software. Maybe able to pinpoint whats faulty.

I saved the side window seals but the front and rears were damaged in removal so either going to get non genuine or bite the bullet and go genuine..

[ECCE]

fro-nt and rear screen seals at trade through nissan will be about $1000, very painfull lol, so what those relays huh, which is the eccs relay???

[blind_elk]

There are 2 relays down behind the ECU - 1 is the ECCS relay, the other is Ign Coils. Both relays are probably working, since you have spark happening. The ECCS actually supplies power to the coil relay.

When IGN is applied, the injectors should have direct 12V (ECU switches them to earth). Check for continuity in the loom between each injector plug and its corresponding pin at the ECU - 1 - 1, 2 - 12, 3 - 3, 4 - 13, 5 - 2, 6 - 11

How did you test the injectors?

[ECCE]

Ah ok, injectors were removed and sennt for testing and have all been cleared as 100 %, as for injector pulse, that i do not know how to test,

[blind_elk]

Just because they work in a test rig doesn't mean they work in an engine. I once had a set that occasionally shut down at idle (low duty cycle). But if I kept the revs up, the engine continued to run. When I took them back to the place I got them, I was told they worked fine (test rig, HIGH duty cycle).

Pull the fuel rail and stick each injector in a jar (or something to catch fuel) - still connected to the loom! Now crank. Any fuel coming out? Can you hear the injectors pulsing (use the old screwdriver-as-a-stethoscope trick)?

Have you tried boosting your battery from another battery / booster pack, ie jump starting your engine?

[ECCE]

Well i thought you guys would like to know what happened, i pulled out the 2 relays near the ecu and ordered some new ones, they arrived today, had the mech put the injectors back in so that i could test it with some datascan software, so he put it back together and hey presto it started straight away, perfectly, pulled the lid of the old relays and one was broken, a connection wire had broken but was still intact, so there you have it, solved, thank you to those of you that helped, your input was all very much appreciated..

will post some pics of black beauty ina few weeks once rebuild is complete.

kind regards..