Guys, I need help fixing my car. On NO ppm, it got 1129 and the limit is 727. The guy said its most probably either the cat, O2 sensor or EGR. I’ve replaced the cat and O2 before the test so I think its the EGR.
Can someone explain to me what the valve is supposed to do when the engine is warm? Like is it supposed to stay closed at idle and open at throttle or something?
And what ways are there to test the EGR valve and solenoid (the thing that splits the vacuum line).
Please help me!. Thanks.
i doubt its the egr. but if you want you can take it off and clean it out. it may be blocked from getting opend all the way. but i doubt it.
Sorry bud but learn what the egr does, before you post. KA’s are notorious for plugged up egrs and collapsed or broken vacuum to the egr.
what are u talking about. the egr is closed at idle. the more wide open throttle you have the more it opens to allow exhaust gasses in, reducing the peak combustion tempatures therefor reducing the amount of Nox under load. i have seen personally egrs that are stuck shut cause a car to fail. eat shit :twisted:
Yah i no how the egr work buddy. To bad Nox is only tested on the 40 roll not on idle cause it cannot be controled at idle. What your saying doesn’t make any sense. First you say you doubt it’s the egr and now your last post leads to the egr and proves me right. NO ppm = NOx
Sorry, maybe I should of been more clear. They didn’t test NO ppm at idle. It just says N/A.
I’m pretty sure something is wrong with the EGR. It seems like it is doing the opposite of what it should be. Even when the car is warm, the EGR stays open at idle and closes on throttle. Wierd…
Also, the vacuum line that connects to one nipple on the EGR solenoid isn’t generating vacuum lol. Does anyone know where this line comes from? And does anyone have a vacuum line diagram?
D_fresh, chill or you’ll be taking a vacation.
Could a leaky injector make the NOx ratings go up that high?
That would raise co or hc I can’t remember which one (i’m not getting my books out lol). Just do what i told you and you should pass. Also check your ignition timing, if it’s advanced it will raise combustion chamber temps and push you over the limit on NOx. With the number you pulled it’s won’t do much retarding the timing but it will drop NOx some what.
wooo welcome to the club im president … if u want etest message me. .
All you need is a cat! ahem ahem!
I would do that but I gave wrong information before. I actually though the PAIR valve was the EGR lol.
Anyways, I applied direct vacuum to the EGR from a friend’s car and it made the car idle really low and crappy. Therefore, I think the actual EGR valve is working.
Next, I checked the EGR-BPT valve. When you rev the car and apply vacuum to one of the nipples while blocking the other, it holds and does not leak. So, I think that is working too.
Damnit, what the frig else can it be?
And, btw, I have an almost brand new 3 inch high flow catco cat on the car so I don’t think thats the problem.