Jump to content
SAU Community

Recommended Posts

Hey guys, currently got a problem with my r33 gtst.

It is missing when it is under load. If u rev it when the car is stationary it will not miss if you gradually build the revs up. But if you rev it once then go at it again before the revs come back down it will miss.

It misses when you are driving aswell if you start to put the foot into it. The car also blows out a puff of black smoke when it misses.

Its not the coil packs and its not my inlet piping (cant find a leak).

Has anyone got any ideas as to what it could be?

Im think maybe i should change my plugs anyway but im doubting it would be the problem.

Thanks, Mike.

Link to comment
https://www.sau.com.au/forums/topic/136683-r33-missing/
Share on other sites

Hey guys, i changed the plugs today and it made no difference at all. My AFM is only like 6 months old and has been used stuff all so i dont think that it is that. Is it possible to be the o2 sensor?

Anyone else got any ideas?

Thanks, Mike

Link to comment
https://www.sau.com.au/forums/topic/136683-r33-missing/#findComment-2543572
Share on other sites

Hey guys, i changed the plugs today and it made no difference at all. My AFM is only like 6 months old and has been used stuff all so i dont think that it is that. Is it possible to be the o2 sensor?

Anyone else got any ideas?

Thanks, Mike

02 Sensors only "Trim" your fuel mixture.

I would be inclinded to be looking at the Ignition system (black smoke indicating unburnt/rich fuel). But thats not to say its not an injector problem. Biggest thing is to test things when you can replicate the problem - hence the use of dyno's for diagnosis. Its one of those things - to the untrained eye you could spend a long time looking for it.

Cheers

Sumo

Edited by Sumo
Link to comment
https://www.sau.com.au/forums/topic/136683-r33-missing/#findComment-2543858
Share on other sites

it started missing after i completed a whole heap of work. ive had stuffed coil packs before and i know the symptoms of them.

car should be going on the dyno sometime this week but i kinda wanted to get rid of the miss before the dyno.

Thanks, Mike

Link to comment
https://www.sau.com.au/forums/topic/136683-r33-missing/#findComment-2544105
Share on other sites

hey guys do u think my problem could be my TPS?

No!!! 99.999999% of the time a missfire will be due to a bad plug (wrong heat range, incorect gap, cracked insulator) or a bad coil (cracked coil boots, foreign particles around plugs/boots and or excessive oil or the coil itself). Also overly retard ignition can casue missfires along with about a thousand other things - check the basics first always!!!!

Can somebody please do a missfire check list and wirte it into a sticky - I swear we see this post every week.

Link to comment
https://www.sau.com.au/forums/topic/136683-r33-missing/#findComment-2546595
Share on other sites

I have similar problem my car falls into a very big hole at full throttle over 4000rpm. I did also have a misfire but a dodgey coil pack was the cause of that. i have exchanged igniter module with a new one still no luck my next step is AFM. if no luck im getting an aftermarket ecu and split fire coils and hope like hell it fixes itself

Link to comment
https://www.sau.com.au/forums/topic/136683-r33-missing/#findComment-2550723
Share on other sites

hey guys 99% sure its not my plugs or coil packs. It misses at any RPM. Ive changed my plugs and gapped them at 26 thou.

Also my injectors are only a couple of months old and were working a few weeks ago, so they should be fine.

I will check the CAS and timing though.

Thanks, Mike

Link to comment
https://www.sau.com.au/forums/topic/136683-r33-missing/#findComment-2554735
Share on other sites

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


  • Similar Content

  • Latest Posts

    • Sounds like you've got an interesting adventure ahead here with local support if you have trouble! My guess is that, unboosted, you will be OK with a small upgrade like -9. What will happen is that once the stock ECU sees more airflow than it expects it will add a heap of fuel and pull a heap of timing to be safe because it can't understand how it could get that much air without there being an issue. You will see clouds of black smoke and it won't pull hard through the midrange and top end. So, overall it will be a bit frustrating but should be OK. If you are still nervous set the base timing back 2o through the CAS, but it will be even more sluggish everywhere. As said above through...this is not my guarantee your engine won't be blown into a million pieces, leaving you looking for very hard to find parts A better idea is get a computer with logging ASAP, wire in a wide band O2 sensor and a use remote tuner. I've done multiple cars this way and while it is not as good as a specific tune on a dyno they can get it 90% right. I'd suggest if you can afford an R33 GTR these days you can afford an ECU and tune. And if you can't afford that you sure won't be able to afford the rebuild if it goes bad in the meantime,.  
    • Yeah it would be nice if someone took the time to put that sort of information together, but there are a lot of variations in looms. I think you are making this way hard for yourself if you just want to get it running....sourcing an SR20 with the right wiring will be a billion times easier than matching the RB loom to an S15 chassis. If you do end up going this way, you just need to trace every wire in the loom with a multimeter, 95% of them will go to a location you can confirm at the ECU.....and then post it up for the next person who needs it  
    • Just top it up with water, and keep a general idea of how much you added. It is normal for water to be pushed into and pulled out of the reservoir through the cap, and it should not be more than half full or it will be likely to overflow when hot. Any decent mechanic can do a pressure test of the cooling system to confirm if you have a leak. Keep in mind if it is only leaking a little and when hot it may well evaporate before you see it hit the ground
    • I'd ask the shop what they used and use that. Mixing coolants is sometimes OK, sometimes not, and you have know the details of each coolant to know whether it's a good idea or not.
    • Is it alright to top up with just another green coolant?
×
×
  • Create New...