Annoying SMOG issues, ECU only passes 3 out of 7 monitors... HELP! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

zomgdrft · 02-19-2007, 12:36 AM

Basically my ecu/car is driving me nuts. When I bought it, it had been sitting without a battery for a good year or so. I fixed it up, put a new battery in, and everything drove great. However, I'm having the hardest time passing SMOG due to the fact that i keep getting CEL/MIL failure on the test. It states that it cannot complete all "internal tests, blah blah."

I took it to mechanic shop and had them run a readiness test to see which monitors/tests mine had passed and which ones had not.

Readiness Test Results
Misfire status = Complete
Fuel Status = Complete
Comprehensive Status = Complete
Catalyst Status = Not Complete
Heated Catalyst Status = N/A
Evaporative Status = Complete
Secondary Air Status = N/A
AC Status = N/A
Oxygen Status = Not Complete
Oxygen Heater Status = Not Complete
EGR Status = Not Complete

Now, I've driven my car a good 600 miles or so since the rebuild. I think that would've been long enough for all monitors to pass. I have no CEL codes or any issues with the car AT ALL. The only thing that's missing from the car is the AC condenser, so the AC does not work.

I don't see how having no AC would cause it to not clear all monitors but at this point, I'm pretty tired of this and just want a resolution. I've researched online and spoke to a mechanic who confirms that Nissan had some problems with early model OBD2 ecu's (96-97). Stating that their drive cycles where very annoying to get all the monitors to pass. I've even tried calling a dealership to see if they'd put it on a dynometer to run it through the drive cycle, but they stated they don't do that

Ugh, I'm at a loss, and I need this to pass in order to reg my lovely new vehicle.

PS - I've ordered an OBD2 plug-in which connects to USB on my Sony VAIO laptop. I ordered it from AutoEnginuity so it comes with some pretty quality software. Hoping that will help me solve some problems. Any help would be great guys, thanks.

EDIT - Also I meant 4 out of 8 monitors on thread title

02-19-2007, 12:36 AM	#1
zomgdrft Zilvia Member Join Date: Feb 2007 Location: norcal Age: 45 Posts: 173 Trader Rating: (0) Feedback Score: 0 reviews	Annoying SMOG issues, ECU only passes 4 out of 8 monitors... HELP! Basically my ecu/car is driving me nuts. When I bought it, it had been sitting without a battery for a good year or so. I fixed it up, put a new battery in, and everything drove great. However, I'm having the hardest time passing SMOG due to the fact that i keep getting CEL/MIL failure on the test. It states that it cannot complete all "internal tests, blah blah." I took it to mechanic shop and had them run a readiness test to see which monitors/tests mine had passed and which ones had not. Readiness Test Results Misfire status = Complete Fuel Status = Complete Comprehensive Status = Complete Catalyst Status = Not Complete Heated Catalyst Status = N/A Evaporative Status = Complete Secondary Air Status = N/A AC Status = N/A Oxygen Status = Not Complete Oxygen Heater Status = Not Complete EGR Status = Not Complete Now, I've driven my car a good 600 miles or so since the rebuild. I think that would've been long enough for all monitors to pass. I have no CEL codes or any issues with the car AT ALL. The only thing that's missing from the car is the AC condenser, so the AC does not work. I don't see how having no AC would cause it to not clear all monitors but at this point, I'm pretty tired of this and just want a resolution. I've researched online and spoke to a mechanic who confirms that Nissan had some problems with early model OBD2 ecu's (96-97). Stating that their drive cycles where very annoying to get all the monitors to pass. I've even tried calling a dealership to see if they'd put it on a dynometer to run it through the drive cycle, but they stated they don't do that Ugh, I'm at a loss, and I need this to pass in order to reg my lovely new vehicle. PS - I've ordered an OBD2 plug-in which connects to USB on my Sony VAIO laptop. I ordered it from AutoEnginuity so it comes with some pretty quality software. Hoping that will help me solve some problems. Any help would be great guys, thanks. EDIT - Also I meant 4 out of 8 monitors on thread title