Jump to content
SAU Community

Loss Of Power Louder Exhaust

Trex

By Trex,
in Four Door Family & Wagoneers

 Share

Recommended Posts

Trex Grand Master

Trex

Posted
Posted (edited)

Hey guys,

i havent boosted my car hard for a few weeks, and noticed when i do boot it, the car loses power and surges a small amount, i have more power on slight throttle than 1/4 1/2 and wot. the exhaust has gotten noticeably louder from the tip, and has backfiring on de-accelerating. You can hear the differences from the turbine at different throttle positions, so i am guessing it is still boosting fine. I have an inkling it could be that the cat has let go and caused a restriction? obviously i would check it myself, but one of the bolts for the cat are tight and is almost impossible to get to without a hoist and the right tools.

edit: The exhaust sound is clean, and it doesn't want to rev quickly in neutral like it should

I've searched online and called some friends but no real answer.

Edited by Stagea97
Link to comment
https://www.sau.com.au/forums/topic/439737-loss-of-power-louder-exhaust/
Share on other sites
stock stagea Collaborator

stock stagea

Posted
Posted

I would go to an exhaust shop and get them to check it out(measure the temp in front and behind the cat), if that isn't the problem you might also find that you have lost a couple of blades on the exhaust side of the turbo, same thing happened to my skyline. Good luck and keep us posted.

Trex Grand Master

Trex

Posted
  • Author
Posted

Thanks for the help stock stag and pickles :)

Sleek came over because I was too sick to work on the car. We tested tps, checked plugs etc etc. I called Jez and another friend and dales friend...

Everyone pointed to the afm being the culprit, I've never heard of the afm doing this so I was skeptical. But sure enough dale took it for a run while it was cold and it ran fine on the cold map, then when things started to get hot it started to play up a lil. Hit it with some contact cleaner and I'll have to go for a drive this weekend.

Also with the afm problem, we had a problem with the auto not wanting to manually engage 1st or 2nd or snow mode or reverse chime etc. we freaked out until we remembered the basics 'check the f**king fuses before you do anything else' sure enough new fuze and everything is now good.

Should I buy a brand new one for $80-$120 comes with 12 months warranty. Or just another second hand for $20.

I won't worry about re soldering. Because I had an afm that f**ked out and re soldered and didn't make a difference.

Cliffs: I'm on the train killing time.

Also got some new tyres. Calling the nsw tein distributor for the rear 345mm springs

post-108100-0-90733100-1393450617_thumb.jpg

post-108100-0-36254600-1393450626_thumb.jpg

Lakes101 Experienced

Lakes101

Posted
Posted

I seem to have the same issue with my m35 surges when in auto mode only but when I'm in sequential mode it doesn't happen at all. Also seems to stall like it loosing air have had to unplug a fpr to keep it from stalling which is making it run rich. What could the issue be here guys?

Lakes101 Experienced

Lakes101

Posted
Posted

I plan to Scott just saving for one and dyno time. But yeah fitted the stock one back into for the 3hour drive back upto Sydney. It runs perfect didn't skip a beat, idled low around 500 but no issues at all. :-/

Lakes101 Experienced

Lakes101

Posted
Posted

Neither would I mate.

After reading the nismo ecu thread started by Craig I was super pumped to get my hands on one but I'm disappointed on the outcome after installing it really. Fuel economy when through the roof was getting 12l/ 100km with standard and 32l/ 100kms with the nismo the engine was surging and kept on stalling on me. It did shift better and have better low to mid torque and spooled up earlier but at the cost of reliability. Pritty bumbed about it. Not sure why it would run lick that though. :-(

Lakes101 Experienced

Lakes101

Posted
Posted

Yeah I know:/ yep same power plant vq25det ARX nm35 stagea had a high flow if think and some other minor mods as mine so don't think that should be the issue as the nismo ecu as all set to the same spec for the vq25det. Strange hey. What do you mean by box btw? How's your car running now bud all good I hope?

Lakes101 Experienced

Lakes101

Posted
Posted

As in transmission? Yeah seems to be fine bro never had a problem with it and runs fine with the stock ecu in oh well shit happens hey! :-/

Good to here mate a quick spray is a much cheaper option to try first but they do seem to let go eventually. :-(

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

    • GoHashiriya
      From Japan and back to Europe, my sh*tbox R34 GTT

      By GoHashiriya · Posted

      Cheers. Skyline is back on the menu, can’t get rid of it. It’s like a child you don’t want, or herpes 
    • Dose Pipe Sutututu
      From Japan and back to Europe, my sh*tbox R34 GTT

      By Dose Pipe Sutututu · Posted

      Welcome back brother 
    • GoHashiriya
      From Japan and back to Europe, my sh*tbox R34 GTT

      By GoHashiriya · Posted

      I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • GoHashiriya
      From Japan and back to Europe, my sh*tbox R34 GTT

      By GoHashiriya · Posted

      It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
×
×
  • Create New...