Jump to content
SAU Community

Engine Cutting Out Randomly

heycharger

By heycharger,
in General Maintenance

 Share

Recommended Posts

heycharger Apprentice

heycharger

Posted
Posted

Hi all, I recently picked up a pretty worked R33 s2. Always been into Valiants/Chargers so this is a little different. :down:

The car has been great but in the last 250km's or so it's developed a problem that seems to occur the more I drive it. At random times when driving, whether running low or high boost, whether the car has been running 5 minutes or an hour, the throttle simply dies. It feels like I've taken my foot off the accelerator pedal; it just looses throttle. Then 1~3 seconds later it kicks back in. Then dies again. etc. It mainly happens driving around town (low RPM), but has occurred on the highway too. Additionally a couple of times when I've started the car up it hasn't idled as high as it usually does and even after warming up for a few minutes it conks out when reversing out. I don't thrash the car (much...) and have only had it happen when doing normal driving, IIRC.

I checked the Power FC hand controller and when this occurs the InjDuty momentarily hits 0% (or otherwise decreases significantly) and IgnTiming drops significantly too (i.e. ~50% down?). The other stats on the 8-way readout appear normal. The throttle 'dropouts' only occur for a split second or couple of seconds then it's fine, then a couple/few seconds later happens again. Usually the problem disappears a minute or two later but it happened yesterday intermittently for about 20 minutes and today seems to be hanging around and showing it's head every 10 minutes for a minute. When the problem happens, there's sometimes (but not always?) a clicking at top of engine; unsure if related (only noticed that this morning once when I had the bonnet up, then it went away).

BTW car was recently tuned and runs very hard 95% of the time without ANY problems whatsoever, so I guess it can't be the tune. Knock is still very low (usually 1~10; hasn't changed since this problem started) and I'm strictly running BP Ultimate 98.

EFI/turbo's are new to me and I feel a little lost...what am I dealing with here?

Any help would be GREATLY appreciated.

heycharger

Link to comment
https://www.sau.com.au/forums/topic/282545-engine-cutting-out-randomly/
Share on other sites
-Jimmy- Mentor

-Jimmy-

Posted
Posted

Very nicely explained, I'm having the same problem on my RB25DE NA... Got no idea what it is or how to test it? Some people say it could be a dodgey AFM but I have sprayed the sensor inside with carby cleaner as suggested, and resoldered all the joints tightly.

wht510 Experienced

wht510

Posted
Posted

The best way of telling whether you have a problem is to plug the car into a laptop with diagnostic software (I bought some diagnostic software = "Nissan Data Scan" for my SR20DET for $40. You need a plug as well to plug into the OBDII plug on the ECU. which is under $100.

THEN you can find all the problems with the motor and see if all the sensors are ok! Easy!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Shoota_77
      Shoota's R33 GT-R RB30/26

      By Shoota_77 · Posted

      @soviet_merlin Thanks mate!  Nothing too major but will hold me up for a while. I've got lymphomas to get taken off the back of my neck and the middle of my spine which always conjures scary thoughts!  It sounds worse than it is. Yeah great, conjuring more rabbit hole deepening , just what I need! 🤣  
    • RP1421
      S15 Spec R

      By RP1421 · Posted

      I'd argue the F50 kit I got is very good value. For ~2k I got the calipers (refurbed condition), adapters, pads, brake lines, rotors, and top hats. I think you'd be pretty hard to get Evo/GTR/350z brembos + the additional hardware for similar money. Used market for a pair of front calipers alone I've seen tend to run anywhere from $1500-2000 depending on condition.    That said, something like a GTR or 350z brembo is a lot easier to adapt to the Silvia. 
    • Milkmun
      S15 Spec R

      By Milkmun · Posted

      Is there a significant price difference between the Evo/gtr/350z brembos vs the F50? Looks amazing.
    • Dose Pipe Sutututu
      R33 fuel setup

      By Dose Pipe Sutututu · Posted

      I was actually being a tightarse at the time LOL... My OCD is tickling me into running a 2nd 8AN Teflon hose all the way down and removing the 2x OEM hardlines. My other side of my brain is telling me to run 2x hardlines front to back (also acts as a fuel cooler, so win win).
    • RP1421
      S15 Spec R

      By RP1421 · Posted

      As I mentioned in an earlier post, I had some trouble with the Silvia's brakes dragging back in 2023. I managed to sort it out then, but the same problem came back to bite me late last year. Just take a look at the picture – I had a feeling the handbrake was acting up again, and I was right. Anyway, I'd been wanting to upgrade to bigger brakes for a while. Not that the Silvia's brakes were bad, but it was more of a "want" than a "need", you know? It was funny, though – at the time, I couldn't find any Evo Brembos, 350Z Brembos, or GTR Brembos for a decent price (of course, tons of them popped up online after I already bought my kit!). I ended up going with an F50 Brembo kit, which came with adapters, brake lines, 330mm rotors, and top hats. The F50 Brembo caliper was used in a few other cars too, like the FPV. I also decided this was the perfect opportunity to ditch the Silvia's ridiculous rear brakes and that awful handbrake (some of you were definitely right about that!). I picked up some R33 calipers and all the necessary bits – rear drums, backing plates, and new hardware to refurbish the calipers. Of course, it wouldn't be a project without a few hiccups. Turns out the brake master cylinder was playing up and basically (to put it simply) keeping the brakes engaged. I had it overhauled, and after some adjustments, everything was working again. The whole process took a while, as you can imagine. To top it off, the front right wheel bearings were shot and needed replacing too. This is a rare occasion where I'm posting an update while it's all still fresh! These pictures were taken just this afternoon.
×
×
  • Create New...