Honda Civic VX failed NOx, EGR system not working - Page 2 - Fuelly Forums

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Old 01-12-2009, 07:41 PM   #11
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Smog check #s
15 MPH, RPM 2362, %CO2 14.5, %O2 0.8, HC (PPM) 10, CO (%) 0.00, NO (PPM) 24,=pass
25 MPG, RPM 2197, %CO2 9.9, %O2 6.8, HC (PPM) 19, CO(%) 0.00, NO (PPM) 1415. =Fail
ECU # 37820-P07-A00
This is the third test.
Connected a milti meter to wires controling solinoid valve , and it only gets a 12v signal only after rpm is between 3400-3800.
Milles on car is 193xxx.
Rancho vx you said somthing about egr passeges clogged ,what is the remedy for this .
And thank you all for your assistance.

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Old 01-13-2009, 07:48 PM   #12
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I believe your EGR singal and valve is working just fine. You turn the EGR on by grounding it, not sending 12 volts to it. I seriously think you would get a code if it wasn't. That doesn't mean that the EGR passages in the intake are not blocked, the ECU can't detect that problem. Even if they are partially blocked, you'll have problems. The entire path needs to be clean. Here's a link to cleaning them.

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Old 01-14-2009, 08:51 AM   #13
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What was the HC like on the first test?
I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice
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Old 01-15-2009, 05:20 PM   #14
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Yes I can confirm that it will throw a code for EGR. You can unplug it at the distributor and see for yourself.

It is extremely common among all makes and models of cars that have EGR for them to get clogged periodically. I'm a smog inspector and I see this several times a day.


Civic VX, D15Z7, 5 Speed LSD, AEM EMS, AEM UEGO, AEM Twin Fire, Distributor-less, Waste Spark
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