Jump to content
SAU Community

Recommended Posts

hi ppl,

i have a 32 gtr which iwas driving all day today and when i was about 5 min from home i merged onto the freeway doing about 120k in 4th gear prob on full boost... about 0.9bar then boost dropped down to about 0.6 bar...

there were no bangs or noises or any jerks or smoke etc.. nothing at all.. but the car wouldnt boost above about 0.6 bar in any gear after that...

i'm yet to drive the car since this has happened as i'm worried somthing bad may have happened..

anyone have any idea what might have happened? i couldnt have blown a turbo or anything without knowing it could i?

thanks for any help..

p.s 32gtr with full zorst and stock turbo's..

Link to comment
https://www.sau.com.au/forums/topic/55575-boost-cut-in-half/
Share on other sites

I don't think you busted anything . If you leave the car overnight you will find it will boost again to normal boost . You have a stock ecu , right ? You probably find that it running a little lean at top rpm and the stock ecu nocked boost down to what the actuator is .6 bar .

If you want to make sure you dont have turbo issues try this test . Unplug the hose that goes to your turbo actuators anywhere you get to it , take it for a run BUT CAREFULL , keep an eye on the boost gauge as soon as it hits .9 bar BACK OFF or you nay blow your turbo. If it boosts to .9 then you will know you have no turbo problems .

thanks for reply,

yes i do have stock ecu.. i was hopeing is was just an electrical problem like that, which will correct itslef when it cools down..

i'l leave it over night and c how it goes tomorro, otherwise i will try the test u mentioned...

thanks agn, much appreciated.. :D

yeh i took it for a drive yesterday morning and it was all fine.. boosting as normal..

must have just been the computer cutting it back like u said..

is this something that will hapen frequently now? i have had the car about 3 weeks and its the first time its happened...

would u recomend get the car dyno tuned etc..

cheers.

Yes it will and its verry risky . Not because you have no boost , its because it cuts boost for a reason ( knock ) to save your engine .

I don't know if anyone can tune stock ecus but you can get a power f/c and have that tuned .

Check to see if you still have the restrictor in .

As far as boost drop to .6 it will that often but it will go back to normal as soon as its reset itself .

hmm yeh i have been pricing some power fc's atm, and should hopefully pick one up soonish...

the boost cut has happened another 2 times now... and it is always in a high gear 4th 5th whilst accelerating hard..

i'l take the car in for a service soon and c if i can get a basic tune till i can pick up an aftermarket ecu..

thanks for all ur help wrxhoon, :rolleyes:

hmm yeh i have been pricing some power fc's atm, and should hopefully pick one up soonish...  

the boost cut has happened another 2 times now...   and it is always in  a high gear 4th 5th whilst accelerating hard..

i'l take the car in for a service soon and c if i can get a basic tune till i can pick up an aftermarket ecu..

thanks for all ur help wrxhoon, :rolleyes:

Try and buy the best fuel you can in the meantime .

You can get a power f/c and hand controlle for $1200 + you will have to pay for someone to tune it , $ 300-400 . In the mean time take it easy on the car .

Its fairly normal for even the GTS-T's to get that fuel cut in a high gear when running around 1 bar.

My GTST used to do it @ ~5500rpm on around 17psi or on 16psi on a really really cold morning.

Now with the new motor (RB30DET) it does it anywhere from 2500rpm on 8-9psi. :spank:

Its not actually maxing out the AFM its more a combination of injector duty cycle & the ecu thinking (hey whats going on here its drawing more air than my map is saying it should be)

  • 2 weeks later...

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

    • Welcome to my 2004 Toyota Mark ii IR-V Fortuna (series 2) With a 1JZ-GTE powerplant under the bonnet (hood) it'll give me plenty of scope for power upgrades. For those who aren't familiar with imports, the 1JZ-GTE is a 2.5L 6 cylinder VVTi engine with a single turbocharger. This has the factory R154 5 speed gearbox, along with a aftermarket 2 way LSD differential (brand unknown). Under the arches are a set of CST Zero 1 alloys, 18x9 +30 225/40 up front and 18x9.5 +15 265/35 on the rear. The car was quite low in Japan and there's evidence of the wheels catching the rolled arches/fenders. The tyre's aren't great so I'm in two minds whether to replace both or just the tyres and put up with the wider wheels on the rear. The car still uses stock brakes with the addition of some braided hoses. The exterior is stock with the exception of a BN Sports front bumper and a replacement Fortuna grill  Moving to the interior, the steering wheel has been replaced with a dished MOMO steering wheel (which will get swapped for my Momo Tuner for the time being) Defi Link Gauges are mounted above the climate controls and on the A pillar, the Oil Temp,Oil Pressure,Water Temp and Boost gauges should help with spirited and track driving  The stock seats have been replaced with some retrimmed Recaro bucket seats. Being a larger build these are a little snug, unfortunately the orange isn't for me so I'll look into replacing these down the line. Other modifications include a twin plate clutch, Blitz intercooler, Evolve alloy radiator, a stainless exhaust with decat, HKS EVC-S boost controller and coil overs
    • Apologies for the long read My R34 GTT was up for sale at the beginning of spring due to a few repairs creeping up. The strut tops needed replacing, roof and bonnet (hood) painting (yay for 3 stage pearl) and the underside stripped and treated. I sold the car which allowed me to be in a much better place financially. Leading up to the sale I was already thinking about the replacement. In an ideal world it needed to be a good all-rounder. Something I can mess around with, modify, do track days, do the school run, go on long drives etc.  Options included but not limited to... Laurel C35, Evo 8/9, Civic FD2, Impreza Hawkeye, Aristo and even an Audi S4 Avant (I've already got the Mazda 6 wagon). But there was always one car at the top of the list The Toyota Mark ii JZX110 I found an advert on a Facebook group for an example in Japan, from a seller called Jon at Rising Sun Exports. A few messages back and forth and Jon calls me from Yokohama one morning (or afternoon in his case). He briefly explained the import process, the costs involved and a repeat of the advert. After much deliberation, the price was agreed and the sale was locked in. I've never imported a vehicle so I jumped into the unknown head first. The money transfer was completed through wise.com (fees apply), very easy to use and the money was with him within a day or two.  The car suspension was raised for the vessel and the car dropped off at the port. It was 7 weeks later when the bill of lading was received and the freight invoice sent to me, followed by the export certificate a couple of days after (both digital copies) In the mean time the port had been in contact. I needed an agent to deal with the NOVA (notification of vehicle arrival) along with the tax/duty invoice, this was £75.00. The port also had a fee of £100, I'm guessing to cover the cost of the 10 day 'free storage' and for moving the car off the boat etc. They need a copy of the vehicle invoice, freight invoice and export certificate to allow the vehicle to pass through customs. The vessel arrived on Tuesday 5th August, the tax/duty invoice was generated and sent over. This is generally tax 20% and duty 10% of the vehicle value. Although the invoice came in at a higher amount than I had calculated. Once HMRC had received the payment the vehicle could be released from customs. I thought once the tax/duty was paid you could collect at any point, that's not the case. Your agent will need to book a collection slot, I requested Thursday 7th which was accepted, with a 9:00am slot allocated. It was a 5:00am start from Norfolk heading to Southampton. We eventually found the compound, upon presenting the bill of lading and some ID they released the car (they drove it out of the compound to the front ready for us to load up). The email from the port stated each slot had a 10 minute window, which seemed abit farfetched but the staff said it's not a strict rule. We were there for approx. 30-40 mins in total. A week prior to collecting I contacted my garage and explained the situation, I was able to get an inspection slot that afternoon. For the registration, DVLA require the car to be insured, for this I used a company called Adrian Flux who can insure the vehicle using the VIN number. 
    • Hey guys, looking for these side skirts if anyone can help me out. 
    • Wife and I are still looking for a new home. One condition was a large enough garage for a full-size lift in one bay. Now if only we could find something... We've been looking for almost a year now.
    • Thanks everyone for the ideas! Sadly, ramps are a no go for me. With young kids at home, I do most of my work late at night while they're sleeping. Starting the car multiple times wouldn't be a great idea.  I'll go see one of those new long reach low profile jacks and take a couple measurements to see if they will fit.   
×
×
  • Create New...