Jump to content
SAU Community

Advice Needed From Someone With Tuning Knowledge

shotter

By shotter,
in Engines & Forced Induction

 Share

Recommended Posts

shotter Rising Star

shotter

Posted
Posted

I got my car tuned a few months ago with a haltech intercepter and the temp that day was around 40deg. The car was running fine untill a week ago. Now when you rev a gear out it starts to pull then it has no power, It feels like it just cuts off. I was wondering if because now the days are around 25deg would the air be colder/denser and it's leaning the mixture up causing this problem? I have also noticed that the exhaust out the back is hotter than i remember.

Thank You

shotter Rising Star

shotter

Posted
  • Author
Posted
no. your fuel pump is no good. or its supply. stick a guage on it and take it for a hit. deffinatly nothing to do with the tune..

mine was done in similar heat. no drammas at all in freezing gouburn

But it's a new pump. And sometimes it will run fine and other times it will play up. i usually find it will play up in 3rd gear.

Fastrotor Proficient

Fastrotor

Posted
Posted (edited)

Could just be over boosting abit in the cooler air and hitting the boost limit .... have you noticed the gauge when driving being a tad higher ?

If you have access to the boost controller / bleed valve etc , try turning it down abit to see if it help.

Gary

Edited by Fastrotor
shotter Rising Star

shotter

Posted
  • Author
Posted
Could just be over boosting abit in the cooler air and hitting the boost limit .... have you noticed the gauge when driving being a tad higher ?

If you have access to the boost controller / bleed valve etc , try turning it down abit to see if it help.

Gary

I have a EBC and it isn't spiking. I holds boost perfectly

Fastrotor Proficient

Fastrotor

Posted
Posted

But do you know what the cut is set at in the haltech ? perhaps it was set too close to the mark, and the difference isnt noticable to you on the gauge ? Can't hurt to try turning it down a couple of pound just for a test, if you've run out of other things to try that is.

Gary

shotter Rising Star

shotter

Posted
  • Author
Posted
But do you know what the cut is set at in the haltech ? perhaps it was set too close to the mark, and the difference isnt noticable to you on the gauge ? Can't hurt to try turning it down a couple of pound just for a test, if you've run out of other things to try that is.

Gary

It will even play up on 6psi

Lithium Grand Master

Lithium

Posted
Posted
I got my car tuned a few months ago with a haltech intercepter and the temp that day was around 40deg. The car was running fine untill a week ago. Now when you rev a gear out it starts to pull then it has no power, It feels like it just cuts off. I was wondering if because now the days are around 25deg would the air be colder/denser and it's leaning the mixture up causing this problem? I have also noticed that the exhaust out the back is hotter than i remember.

How are you testing the EGT? Any chance you have a leaky blow off valve or some other intake leak forming?

shotter Rising Star

shotter

Posted
  • Author
Posted

I replaced the fuel filter a few months ago and the compression is fine. I went back to the workshop that tuned my car and as usuall they were useless and rude. I decided to drop the base timing back alot and now the car doesn't play up.... it idles really low now but i will adjust that soon.

  • 2 weeks later...
shotter Rising Star

shotter

Posted
  • Author
Posted

ok i have set the base timing to 15deg with the TPS cable off. I noticed that the timing jumped up a fair bit when i pluged the cable back in but i guess that is pretty normal. But driving it after that it still feels like the power cuts as you rev out the gears. The only other thing that im wondering is i have heatrange 7 spark plugs in there and the std coils. Now i dont know much about exactly how the different heat ranges affect different things. I know that when its cold it runs like a dog thats fine but should i go back to heatrange 6 plugs till i get splitfire coils? Or could i just be barking up the wrong tree?

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

    • GTSBoy
      Best place to order Authetic R32 Parts in Japan

      By GTSBoy · Posted

      I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • GTSBoy
      Ethanol Content Sensor - Always at 11%?

      By GTSBoy · Posted

      The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      Yes they do. For some maybe. But for those used the most by abusers, ie Skylines, the numbers are known. The stock eyebrow height for R32/3 Skylines is about 365/375mm or thereabouts. The minimum such heights are recorded in adjacent columns in the database.
    • soviet_merlin
      Ethanol Content Sensor - Always at 11%?

      By soviet_merlin · Posted

      Hmmm, interesting. Makes me wonder whether there is bias as well. It's the cheapest fuel, so it is used for all kinds of ill-maintained shitboxes which are bound to have issues regardless. Nicer cars tend to require higher octane rated fuel and can't use it anyway. FWIW, the official NSW E10 facts page is decent. 
×
×
  • Create New...