Rb25 Cutting Out Randomly

[M3ld]

Hey guys,

I have a r33 with the 25det. I have jsut had the cannon cut off and a set of shotgun tips put on. Now I have a problem. It drives fine, idles fine and doesnt backfire or anything weird. When I am driving along or pull up at idle it cuts out. Starts back up and runs fun for X amount of kilometres then happens again.

I have done just under 100km and it has happened 4 times now. I know the exhaust shop had to take out the oxygen sensor to do the exhaust. Could there be a problem with it now after being fiddled with?

I am running a power fc with boost control, front mount, plenum etc.

Any help wpuld be great, Cheers.

[GTScotT]

did they disconnect your battery when they welded the exhaust on?

and are you certain the problem started after the exhaust was done and not prior?

[DVS JEZ]

is the idle fine? does it do it when the revs drop suddenly like after you put clutch in when coming to a stop?

or does it do it when driving it will konk out?

what BOV are you running?

[femno]

If it does it when youre driving its most likely the AFM.

[M3ld]

The exhaust was welded when it was off the car so It can't be from that. BUT they might have had it on when welding a bracket or two and I'm guessing they wouldnt have bothered to disconnect the battery. And yep, I am certain it started after the exhaust was done.

Still idles fine, no surging or anything like that. It has cutout before on me after coming off load and clutching it, but I am pretty sure that might have something to do with the knock off hks ssqv I am running?

But this is different cut out. It has happened 2 times when I have been cruising along with no gear change and not under hard load. Just cuts dead. And other times I have pulled up, let the car idle and get out to do something and a random amount of time say 30seconds later it cuts out. I forgot to add in my first post I am running a HKS turbo timer. Could something be going wrong with it?

Cheers for the input so far everyone.

[PROXIMITY]

Timer perhaps or faultly connection somewere.

I had similiar problem and my loom plug was just not in power fc properly/ enough, i just unplugged and re plugged and done up tight again.

Edited March 3, 2010 by PROXIMITY

[M3ld]

Checked the power fc, battery, afm plug and any other connection I could see and everything seems fine. Have to do 400km round trip tomorrow so hopefully it doesn't play up on me.

If it is the AFM that is shagged or the turbo timer would an auto electrician be able to test them to see if they are actually the problem without me having to replace them? The car is also running an alarm system with imobiliser so it could possibly be that aswell?

[PROXIMITY]

When i have had faulty afm the car has never just stopped.

Alarms cause alot of problems, maybe try disconnecting it all.

[Guilt-Toy]

sometimes welding with the battery connected can damage the alarm / immob and cause issues like this

[M3ld]

Thanks fellas, I will have a look into the immobilsor and try disconnect it all and see what happens

[M3ld]

Well I unhooked the pfc, which was still plugged in fine, blew out any dust and re-checked any connections. Put it all back together and havn't had a problem yet. Did a 400km round trip and it went fine so I'm hoping the problem has been fixed by a unplug and plug haha