Advice Needed From Someone With Tuning Knowledge

[shotter]

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

[T04GTR]

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

[shotter]

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]

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 March 11, 2009 by Fastrotor

[shotter]

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]

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]

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

[Guilt-Toy]

this is what happens when people get band aid computer solutions.

[Lithium]

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]

Well it looks like it was an adjustable fuel reg i had on there that was playing up and not the haltech at all.

[shotter]

ok i take that back. It's still doing it just not as bad. Im wondering if the base timing is too advanced. Will it cause this problem? i think it's around 20deg BTDC.

[shotter]

Also i found that the car will run better on 1/2 throttle compared to full throttle.

[shotter]

Plus the idle is pretty rough and it likes to stall. It never used to still for no reason.

[radix]

Fuel filter?

[Lithium]

I'd try doing a compression test.

[shotter]

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.

[shotter]

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?

[Greekos]

take your car to a workshop that deals with imports or performance cars, your either going to find a fix by chance or end up doing some expensive damage.

[shotter]

But thats the problem. I have taken my car to 2 performance workshops before and paid over $2000 and they were useless. It's hard to find a good workshop in canberra