R33 Gts25t S2 Randomly Shuts Off

[bradsm87]

I've got a mate with an R33 GTS-T Series 2. He knows the previous owner who has imported it and looked after it well. It's straight and very tidy looking. The only mods it has is a pod filter, FMIC and 3" turbo-back exhaust.

It used to misfire badly but that problem has been resolved with new spark plugs and Spitfire coil packs. Series 2's have ignitors built in to each coil pack so the ignitors have effectifely been replaced as well.

I have cleaned every single connector on the car with contact cleaner, rubbed the paint back behind all the major earths for a better connection, cleaned AFM, checked all wiring for damage, cleaned piping, blocked hole in BOV, all the usual stuff to help get it running sweet. The previous owner has replaced the fuel pump with a brand new nissan one.

You can be driving along and the ignition and fuel would just CUT. Can be for long enough to stop and can be in the form of a brief cut then away you go. It doesn't pop or anything when it cuts back in which leads me to believe it is spark and fuel. Not 100% on the fuel bit but ignition is DEFINATELY cut. All the dash lights that are usually on when the car is running remain on. It's not like a pop or bang, just like if u turned the key off while driving.

The previous owner has taken it to a few of their trusted places time and time again without success.

Any help or similar experiences would be greatly appreciated.

[Jmaac]

have you tried switching the ecu for another s2 one?

[daineisdabomb]

definately sounds like an electrical fault. hav u checked the ecu for error codes?? sounds like something is shorting out, like a wire is exposed and earths out every now n then. my bro had thermo fans on his n the relay stuffed up and his car just wouldnt run coz if the ecu is shorted it causes the car to shut off. definately a head f*#k, good luck with it.

[Adriano]

Check error codes, sounds like afm

[bradsm87]

No error codes. Have borrowed my mate's laptop with Nissan Datascan and consult cable but I can never catch it doing it with the laptop plugged in and I can't borrow the laptop for more than a few hours.

I'm lookin at the PCB in the AFM now and the solder joints look a little dry but not cracked off. My mate has already purchased another S2 AFM that looks grottier on the outside but u never know!

[2LV8ETR]

I've had this gremlin twice and both times it was something different.

The first time was a dirty AFM.

The second time was a loose wire on the ECU connector harness.

[SirRacer]

Fuel pump!