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s**t performance at normal temperature.. 

 

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 Post subject: s**t performance at normal temperature..
Posted: Sun Apr 17, 2005 9:45 pm 
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Hey guys.

My car (manual el xr8) runs awesome when cold, but once the engine reaches 'normal' operating temperature, it loses heaps of performance at full throtle?

Why would this be?
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Posted: Sun Apr 17, 2005 10:07 pm 
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I would be checking AF ratios on the dyno, the only thing I could think of is if the car runs very lean (from maybe a dirty MAF or bad injectors/pump) then the extra fuel added when cold brings the AF ratios back to normal. The EEC doesn't do anything to timing until it gets really hot so fuel would be the only thing to look at I reckon.
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Posted: Sun Apr 17, 2005 10:18 pm 
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EDXR8 wrote:
I would be checking AF ratios on the dyno, the only thing I could think of is if the car runs very lean (from maybe a dirty MAF or bad injectors/pump) then the extra fuel added when cold brings the AF ratios back to normal. The EEC doesn't do anything to timing until it gets really hot so fuel would be the only thing to look at I reckon.


Good stuff, if its as easy as that then ill be happy, lol.
Looks like ill be booking it in for some dyno time..
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 Post subject: Re: s**t performance at normal temperature..
Posted: Sun Apr 17, 2005 11:54 pm 
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Bassfreak55 wrote:
Hey guys.

My car (manual el xr8) runs awesome when cold, but once the engine reaches 'normal' operating temperature, it loses heaps of performance at full throtle?

Why would this be?


u shouldnt really flog ur car when its cold :)

 

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 Post subject: Re: s**t performance at normal temperature..
Posted: Mon Apr 18, 2005 12:07 am 
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NC 5ltr wrote:
Bassfreak55 wrote:
Hey guys.

My car (manual el xr8) runs awesome when cold, but once the engine reaches 'normal' operating temperature, it loses heaps of performance at full throtle?

Why would this be?


u shouldnt really flog ur car when its cold :)


Yeh i dont really, but as a comparison i did.. lol :P
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Posted: Mon Apr 18, 2005 6:51 pm 
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Yeah, my XR8 is the same, once the car has warmed up, to above the line on the temp gauge, it pulls a fair bit harder, once its warmed up to the usual operating temp, i can notice t just doesn't pull as hard.
I might have to check some of this myself as well.
Thanks Dude

Dave
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 Post subject: what thermostat are you running
Posted: Mon Apr 18, 2005 8:40 pm 
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doubt it's the problem but I pulled the 192deg factory thermostat and put a 180 in seemed to make a noticable underfoot differance. any lower and according to the mustang tech talk the eecIV runns in warmup mode

 

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Posted: Tue Apr 19, 2005 12:33 am 
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EL XR8 wrote:
Yeah, my XR8 is the same, once the car has warmed up, to above the line on the temp gauge, it pulls a fair bit harder, once its warmed up to the usual operating temp, i can notice t just doesn't pull as hard.
I might have to check some of this myself as well.
Thanks Dude

Dave


Yeah man, thats the EXACT same problem that ive got with mine..
Its f**k, i hate it..
Rang the mechanic today, he seems to think it might be electrical related, like coil or sum s**t, but wont say forsure unless i leave it with him..
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 Post subject: Re: what thermostat are you running
Posted: Tue Apr 19, 2005 12:36 am 
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dalesf150 wrote:
doubt it's the problem but I pulled the 192deg factory thermostat and put a 180 in seemed to make a noticable underfoot differance. any lower and according to the mustang tech talk the eecIV runns in warmup mode


my thermostat has just been replaced with an OEM one from ford, didnt make a s**t of a difference, lol
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 Post subject: Re: s**t performance at normal temperature..
Posted: Tue Apr 19, 2005 11:24 pm 
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Bassfreak55 wrote:
Hey guys.

My car (manual el xr8) runs awesome when cold, but once the engine reaches 'normal' operating temperature, it loses heaps of performance at full throtle?

Why would this be?


Are you running a pod filter?

 

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Posted: Tue Apr 19, 2005 11:47 pm 
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EDIT: lol my bad..

Once warmed up, most cars will lose power.. Pretty simple really. Hot air = less dense air = less performance.

 

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Posted: Thu Apr 21, 2005 12:18 am 
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One Drone wrote:
EDIT: lol my bad..

Once warmed up, most cars will lose power.. Pretty simple really. Hot air = less dense air = less performance.


toshey or however the f**k u spell it ....lol :wink:

 

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Now with el thermos fitted.

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 Post subject: Re: s**t performance at normal temperature..
Posted: Thu Apr 21, 2005 7:19 pm 
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fairmont1998 wrote:
Bassfreak55 wrote:
Hey guys.

My car (manual el xr8) runs awesome when cold, but once the engine reaches 'normal' operating temperature, it loses heaps of performance at full throtle?

Why would this be?


Are you running a pod filter?


Nope, no pod filter. Just a BMC panel filter in a standard box, with ss induction. But yeah, its not sucking up hot air from anywhere...
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Posted: Fri Apr 22, 2005 8:58 pm 
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Yeah thats my problem, i've a got a BMC Pod Filter, with one of the shrouds from the BA XR's, but no cold air yet!
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Posted: Mon Apr 25, 2005 12:30 am 
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Sounds like a typical problem with the bloody things
cos Guess what ????
mine's the same!! It drives you up the wall trying to find the problem, just when you think you have found it , you find its not the problem at all!!
dyno analizing is the only way, check AF ratios, spark timing etc
cos you will spend s**t on replacing parts that are ok.

 

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