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R32 Gtst Rb20det

david69

By david69,
in Engines & Forced Induction

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david69 Community Regular

david69

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Been having intermitant stalling issues sometimes at idle she will stall.sometimes at any rpm she will momentarily die but then come back.changed afm,ignitor coil packs are new.its not a miss fire it just momentarily dies.tried shaking wire harness under bonnet around with no issues.any suggestions.cheers

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https://www.sau.com.au/forums/topic/465579-r32-gtst-rb20det/
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david69 Community Regular

david69

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I have a new fuel pump.ive checked all the relays and fuses.never seems to do it on boost ,max was probably at 3000rpm.could the crank angle sensor cause this or would that just be a misfire cause it is definatly momentarily dieing in the ass.when it stalls while idling it will start straight away.couldnt find a light on the mines ecu to fault find.i have a consult unit but im not sure what or where to get the software from.was hoping maybe it would give me a code.

david69 Community Regular

david69

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No i havent actually replaced and tried the eccs relay.i just checked the connections by pulling out and back in and sort of shaking the harness and plugs around while idling.i cant get my hands on a known 100% maybe a used from the wreckers.

david69 Community Regular

david69

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Just thinking could that eccs relay be the cause of when i turn the engine off 50% of the time it still runs for a bit although roughly at sort of half idle .it usually stops byself after about 5 seconds or if i just press the accelerator it will then stop and then at that point  the relays or whatever sound i hear in the car actually click and thats when it shuts down like the ignition is still on until i press the acelerator.i changed the ignition swtch but still the same and i dont have  a turbo timer.maybe problem is related.oh and also sometimes to start starter motor just clicks.also changed that but still the same.ok thats all the electrical problems i have.maybe its all related.

GTSBoy Grand Master

GTSBoy

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Sounds like a complete mess.  Too much of a mess to try to tease out whether you've got one root cause or a bunch of separate ones.  I would say though that it is eminently possible that someone has done something....inappropriate with the ECU/ECCS wiring at some point which could cause it all.  Booting a Nissan ECU is a bit like booting a PC.  There is always power fed to part of the "motherboard" and when you send a signal on one pin it causes the rest of it to boot up.  The ECU has some feedback in its wiring to keep the ECCS relay powered after you remove your external power up signal.  When....unskilled people play with that wiring you can get freaky behaviour like you describe.

david69 Community Regular

david69

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Yeh your 100% right the wiring especially under the dash has been messed around with by previous owner.its only been playing up say the last say 6 months.ill just slowly start eliminating one thing at at a time.i do have an electronics background but its never hurts to ask for ideas.cheers for the help.

  • 2 weeks later...
david69 Community Regular

david69

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Ok.stalling and cutting out issues sorted.i remember my vl turbo many years ago had a plug near the dizzy that when u jiggled it would stall.so i replaced my cas with a spare i had.the connector plug had the locking tab busted but since i swapped it over the stalling at idle problem and the brief cutting out at revs has stopped.maybe just taking the plug on and off sorted it could not safely acesses this plug while engine was running.bought a new plug and i will replace.1 problem solved.

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