Cant figure this one out :(, help!!

Sside

Sside

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Checked the timing today supraguy, it was timed...... So I'm out of $40 bucks spent on a timing light gun :(, went home and replaced the fuel regulator in hopes that this might do it... Knew it was a long shot but I tried it anywas... Didnt work either.... I am higly stressed not and fustrated..... Really I would take it to a shop I cant afford it, 2nd of all I have fixed everything in this car but 2 things I didnt have the tools for.... Everything I have fixed with the help of others here and a great friend in Derek (JDMMA70)..... :( I pretty much came to a haulting stop..... :( sigh...
 
3p141592654

3p141592654

90T
Oct 11, 2005
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Well, you could always try troubleshooting it! :icon_razz

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=119

or continue your current approach....

4.jpg
 
metaphysico

metaphysico

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supraguy@aol;1624421 said:
No. High temps cause NOX. NOX can't even form at less than ~2200-2500 degrees.
HC is high because he is rich. NOX is low(a good thing) because being so rich causes low combustion temps.
Normally the NOX is reduced by the EGR system introducing spent ex. gasses, which reduces combustion chamber temps.
Additionally, the cat will break apart some of the NOX as well. But in this case, I'd say that most of the reduction of NOX is simply due to such a rich(therefore cool) combustion process. Once he gets the mixture under control, his NOX will rise, but that's ok- he's got plenty of headroom for it.

What I was saying is
---------- Post added at 09:23 PM ---------- Previous post was at 09:21 PM ----------

Is your idle normal- ie: 700-800rpm when warmed up?
Click to expand...

Nox is from low cyl temps, low cyl temps probably caused by the high HC, HC is unburnt fuel ie too much gas.

Meaning nox is the way it is because of low cyl temps, low cyl temps is because hc is unburned fuel, unburned fuel is carrying the heat from the cyl. Hence low nox and high hc.
 
mkiiichip

mkiiichip

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Huh, ok then, your free to do what you want.
What you have spent on an o2 sensor and a timing light, you could have paid someone to properly diagnose the issue.


metaphysico;1625151 said:
Nox is from low cyl temps, low cyl temps probably caused by the high HC, HC is unburnt fuel ie too much gas.

Meaning nox is the way it is because of low cyl temps, low cyl temps is because hc is unburned fuel, unburned fuel is carrying the heat from the cyl. Hence low nox and high hc.
Click to expand...

What are you talking about? There is not a NOX issue here, 200 ppm is perfectly acceptable. There may be an issue once it gets leaned out though.
 
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metaphysico

metaphysico

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The point I have is nox is lower than it will be when the hc problem is cleared up. High hc will cause low nox, not saying his nox is too low because nox cant be too low. So when the hc is fixed the nox will be up.
 
Sside

Sside

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mkiiichip;1625157 said:
Huh, ok then, your free to do what you want.
What you have spent on an o2 sensor and a timing light, you could have paid someone to properly diagnose the issue.




What are you talking about? There is not a NOX issue here, 200 ppm is perfectly acceptable. There may be an issue once it gets leaned out though.
Click to expand...

" I do what I want" is a joke, no harm intended... The reason I came here and made a thread about this problem was to receive help from others who may have already had this problem or have a clue about what could be wrong... I know I could just pay someone to do it for me but its easyer said then done, how many shops will actually give me a good price and know what they are doing.... If a shop is that good then they will most likely charge me more than an O2 Sensor that needed replacing and $40 timing light gun...

Guys, I am not trying to be a punk.... I may have to call a mechanic but the only mechanic I trust with this car is not cheap and charges $65 just for the trip and the diagnostic...... Not trying to piss anyone off but this problem has me fustrated and I dont inted it to take it out on anyone.....
 
Sside

Sside

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Another MkIII;1625173 said:
Did you actually check your fuel pressure before replacing the regulator?
-AM3
Click to expand...


Another MkIII, no I didnt... But I had a spare one laying around... Changed it in under 30 min, felt like it was worth the try.....
 
Sside

Sside

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metaphysico;1625322 said:
Here is some info that may help. http://www.autoshop101.com/forms/h56.pdf Also what temperature is the car at, ie is it getting to warm operating temperature. A stuck open thermostat among other things can get you some strange readings.
Click to expand...

Well about the operating temp, this morning I started my car and to my surprize a very light amount of smoke came out.. Almost none, took out the car for a spin and my father said it only smoked a slightly bit when I took off.. I did a few runs around the neighbourhood and my father said the car was running clean no smoke at all.. Came back, parked the car and it was iddling beautifully at 550 to 600 smooth..... I was hopefuly maybe that fuel pressure regulator did do it but then an 1 hr later I went to run an aron once oce again a good amount of smoke shooted out when I started the car... So now I am confused, cold engine= slight to no smoke... warm engine that has sat 30 min to an hour = smoke.... :/
 
mkiiichip

mkiiichip

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Smoke on cold start, is valve guide seals seeping, has nothing to do with how the car runs.

So how do we know that the o2 sensor didnt fix the issue? Whats the VF reading?
 
Sside

Sside

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mkiiichip;1625440 said:
Smoke on cold start, is valve guide seals seeping, has nothing to do with how the car runs.

So how do we know that the o2 sensor didnt fix the issue? Whats the VF reading?
Click to expand...


Because the next day I put the new Denso O2 sensor in I and went back to the inspection place confident, even smiled when I handed them my keys :).... But I failed again and the readings actually were higher than the first time.... The picture I posted was the latest reading, the one before with the older O2 sensor was the first and slightly better so I actually managed to do worst with a new O2 sensor.... Dang, I left that out fromt he beginning didnt I? Sorry :(....
 
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