Jump to content
SAU Community

Recommended Posts

the other day i uped the boost on my r33 so that it know runs around 10-11 psi but dont know if this model has a boost cut or i have some bad fuel, or maybe time for some knew plug. once it gets boost of 10-11 it splutters and pops through the exhaust. the plugs have done 25000 kms and the fuel im using is mobil.

Link to comment
https://www.sau.com.au/forums/topic/43586-boost-problem/
Share on other sites

sorry as far as i know they have a boost cut for over boosting, I ran 14psi and no drama's, my car did suffer a broken land on piston 6, just when i bought it, because of a failing fuel pump, I found out after the rebuild that the fuel pressure dropped away under load. this was before I did any mods to it. a new 044 and she was a steady pressure again.

Link to comment
https://www.sau.com.au/forums/topic/43586-boost-problem/#findComment-891084
Share on other sites

Cav its your plugs, I just went through the same prob last weekend, car loosing power like spark or fuel cutting at anything higher than 9psi.

I replaced the plugs from fairly new NGK's to Double Platinum Autolits $90 all up and was advised by two different GTR specialist one online in N.Z skylinesdownunder forum to gap them to .66 So I took them as close as I could to that and guess what, it bloody worked, boost is fine all the way to 12psi - not game to take any further till I get a front mount.

Link to comment
https://www.sau.com.au/forums/topic/43586-boost-problem/#findComment-894992
Share on other sites

i found iridiums to be shite in my S13 ... soon as i upped the boost with an EBC it started missing. took the iridiums out and put in just your normal cheapy plugs that are like 12$ a set and it worked a treat. id say find out what is the cheap copper alternative to your plugs (NGK brand still though) and put some of them in at the same gap of .75-.8. for $12 it cant hurt to see if it is just crappy plugs.

yeah u need to dyno your car with a fuel pressure guage to test the fuel pressure. however, if you are upping your boost, it is a sensible option to upgrade your fuel pump anyway, especially if your planning to run the higher boost all the time and more power in the future. an 044 intank replacement is usually a good bet.

if it still has issues and you want to go for a Malpassi pressure regulator, do that after you've done the fuel pump. the Malpassi wont do much good if you have a stock fuel pump coz the pump will struggle to keep up the increased pressure anyway. i had a misfire in my DR30 skyline, changed plugs and leads, reset ecu, upgraded fuel pump, and still had a misfire at around 1bar. after fitting a Malpassi Rising Rate regulator the misfire is now gone.

try plug changing and see how you go to start with though!

Link to comment
https://www.sau.com.au/forums/topic/43586-boost-problem/#findComment-902830
Share on other sites

guys i have changed the plugs with a set of ngk cheapies and still the same. got my mates to watch the ass of it and it is blowing raw fuel out the exhaust. do they have trouble with the coils, maybe one doesnt like the increased boost (extra load). it doesnt play up till high in the revs 5000-6000 rpm. i can run 10-11 psi low in the revs with no trouble.

Link to comment
https://www.sau.com.au/forums/topic/43586-boost-problem/#findComment-909192
Share on other sites

  • 3 months later...
sorry dude havent sorted the problem yet, am thinking coils, or an after market computer its got me stuffed need to get it to someone whos playing with them all the time. i might sell it yet, that will fix it.

luckily it seems it was just my plugs...I hope you get yours all worked out though. Good luck!

Link to comment
https://www.sau.com.au/forums/topic/43586-boost-problem/#findComment-1054385
Share on other sites

guys i have changed the plugs with a set of ngk cheapies and still the same. got my mates to watch the ass of it and it is blowing raw fuel out the exhaust. do they have trouble with the coils, maybe one doesnt like the increased boost (extra load). it doesnt play up till high in the revs 5000-6000 rpm. i can run 10-11 psi low in the revs with no trouble.

Sounds like a fuel problem dumping too much fuel in and choking on it if its coming out the exhaust as a liquid :uhh: - SAFC ll can fix this.

Could be the coil packs, you'll need to tape them up with duct tape. Because the spark can ark out the side which results in the plug not getting the full spark. Do you run the black cover ontop of your coils - Saying Nissan 2498cc etc... ?

Hope that helps.

Link to comment
https://www.sau.com.au/forums/topic/43586-boost-problem/#findComment-1054433
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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...