ZD30 Engine Challenge - Intermittent Power Loss

[stumpie]

I had the same problem and mine turned out to be the ecu relay

[GU3_P@trol]

I have replaced all the rubber fuel lines in the engine bay and searched everywhere else for leaks and nothing found. Also, if I check the fuel primer on top of the filter whenever it has stopped, there is always still full pressure in the lines.

I have pulled the ecu relay and it looks to be fine. I also have an EcuTalk gauge fitted that connects to the OBD2 port and I assume it gets all its reading from the ECU. Whenever the car has stopped or played up there is no disruption to the readings on the EcuTalk gauge, so I would assume the ecu relay and ecu are fine if they continue to provide uninterrupted data??

Cheers

[threedogs]

X 2 on the ECU relay one less thing to go wrong,

[Yendor]

Try swapping the ECU relay with the A/C relay under the bonnet.

If the ECU doesn't have power it can't log any problems or disruption in data readings.

Saying that, your problem sounds more likely to be a problem within the electrical circuitry of the injector pump, but swapping the relay will not cost you anyhing to try.

If at some stage it doesn't start try pouring some water over the injector pump and see if it starts.

[GU3_P@trol]

Quick update. Changed the ECU relay for the A/C relay and we haven't had a stoppage since (1 week). Still early days though as it is an intermittent thing, but thanks for all the advice that has got me to this stage.

Cheers

[Yendor]

Thanks for the update. Has your A/C stopped working at any stage or doesn't seem as cold as before the relay swap?.

Please note, the relay swap will not affect the interior fan operation.

It will either stop your A/C from getting cold or maybe not has cold as it was before.

[GU3_P@trol]

Yendor, haven't noticed the aircon not working, but the missus does believe it hasn't been as cold as usual.

Time will tell.

Cheers

[Money-fishing]

Great info guys! Hope all works out for you mate.

[GU3_P@trol]

Unfortunately the saga continues and some more advice needed!!

The vehicle ran fine for a number of months and then a few weeks back went into an underground car park and up and down a few ramps then headed back up the street and lost power again and spluttered and farted and shutdown multiple times on the way home. Next day no problem but thought it might be some crap in the tank that going up and down the ramps stirred up.

So vehicle was running fine again and I pulled the tank - spotless inside except for a small piece of foil from a injector cleaner additive bottle!. Connected the tank back up and here's where the fun begins! Soon as it was started got an engine fault light (77 - P7 code) and seemed to be in limp mode with no power all the time. shutdown and restart with the same result for a number of days. Went back to the tank and pulled the vent pipes that go to and from the check valve and blew all hoses out with air. rotated the check valve a few times to clear any liquid in it. Vehicle started with no engine check light, had full power and went like a dream for a few days. Checked all forums and found nothing on anyone having trouble with the check valves and Nissan said they have hardly ever sold any ($78 each).

Coming home from the Sunshine Coast yesterday the engine check light came on (77 - P7 code) and the engine started to miss and splutter and eventually died. Pulled over, restarted - spluttered and died a few times. Let it sit for 5mins and restarted and drove home with no problem.

The missus is a most unhappy camper and I'm unsure where to go next!! Any thoughts?

[threedogs]

Could it possible be the ECU relay you swapped with the air con is faulty as well.
Buy 2x new relays and see how you go. disconnect and clean battery terminals with a scourer.
Someone asked on another thread , where is the ECU relay located?