R33 Gtr Cutting Out Randomly, Ideas?

[RB335]

Hi Guys.

Basically I am having a problem with my R33 GTR. What happens is that it would run great, then intermittently it would cut out, the revs would go all the way to 0 that it's barely idling then turn off. At this stage normally takes maybe 20 seconds until the car will start. It mainly has done it to me at the lights, keeping the revs up sometimes helps.

When I try to drive it when this happens it's extremely low on power, walking pace. There is no black smoke.

It's not load based, as normally when I have the car under load it wont do it, so I'm discounting coil packs or spark plugs.

I have tried another Ignition module but the problem re-appeared.

When it happens, it would be idling, then you hear the revs drop slightly and come back up, and then a few seconds later it just bogs right down and eventually dies.

Has anybody had a similar problem and what could it be?

Thanks.

[niZmO_Man]

Tried another pair of AFMs?

[breaker1845]

AAC and IAC valves under your plenum might be causing you grief. Also your blow of valves, how are they setup? recirculating or no?

Sounds like you have a constant vacuum leak that you notice under idle

[flavzz]

I had a very similar issue. Resoldering the AFMs fixed the problem.

[RB335]

Was not thinking it being a vac leak, as it's not constant issue, totally random.

flavzz any Info on re-soldering AFM?

Cheers.

Breaker, BOV/BPV are 100% Factory and untouched RB26 ones.

[flavzz]

If your afms are original there is a good chance a quick touch up with the soldering iron will help. The solder dries up over time with the heat cycles the rb26 experiences and connections get dodgy. My car suddenly experienced the same issues you mentioned. I used this guide from memory http://www.sau.com.au/forums/index.php?/topic/113284-Fixing-Your-Rb26-Afm's

[luke gtr]

To go with above, I had good afms, but a fault in the wiring going to the lower afm.

Could wiggle the wiring and get the car to cut out.

[Jacko1987]

Maybe check timing

[RB335]

OK Well I've now done the solder on the AFM's, joints looked good but I still dropped new solder on all of them.

The Top AFM plug would cause the engine to surge but not cutout totally when wiggles, so I tightened the pins on the plug itself but that could be a totally different issue, as this causes the car to cut out totally and not restart.

I tried starting the car without any AFM's at all and the car can start and idle fine, so my issue does not appear to be caused by AFM's by the looks of it.

Next up is either Ignition module, or cam angle sensor.

[RB335]

So I have changed the ignition module and it has not done it since.

[flavzz]

Good result mate. They are tricky things. At least the resolder may prevent some other future afm issues.