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Advice Needed From Someone With Tuning Knowledge

shotter

By shotter,
in Engines & Forced Induction

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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

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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
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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
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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
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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?

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