the infamous....

[kamikazekid]

Check engine light. need to pass smog, tipical stock KA with the anoying check engine light on. what do i need to do to clip the wire and turn it off for good?

[916S14]

Well it depends if you got OBD1 or 2. You might as well go to a local car parts store and rent the little scanner tool and fix the problem. Most likely its your Evap, those go bad all the time.

[Dousan_PG]

wire the oil pressure and engine light together
haha
assuming ur pre '94

pray your actual emission output is ok too.

[kamikazekid]

wire the oil pressure and engine light together
haha
assuming ur pre '94

pray your actual emission output is ok too.

it passes the sniffer but the dam light keeps failing the test. wheres the wire on the ECU i need to cut?

[kamikazekid]

Well it depends if you got OBD1 or 2. You might as well go to a local car parts store and rent the little scanner tool and fix the problem. Most likely its your Evap, those go bad all the time.

its OBD1, its just a stock hatch. it pulls up 32 ( EGR). but i checked it and replaced it. still comes on though.

[Dousan_PG]

it passes the sniffer but the dam light keeps failing the test. wheres the wire on the ECU i need to cut?

read what i said again until you undrestand


turn ur car on

watch the oil pressure come on

and turn off


imagine if u wired your engine like to that same wire what would happen?

[yarou]

read what i said again until you undrestand


turn ur car on

watch the oil pressure come on

and turn off


imagine if u wired your engine like to that same wire what would happen?

Yeah, he's right. To pass smog they need to see your CEL blink when you turn your car on with all the other lights. If you just cut the wire and the CEL doesn't show during start up, it won't pass.

[kamikazekid]

dam i never thought of that. well this is why i asked the question. thanks guys.

[mrmephistopheles]

oil pressure or battery.

Strange thing though - Nissan put that there to let you know when your engine isn't working right. Why would you want to drive around with a questionable engine?

[RedtopTech]

if you replaced the valve then there are only 4 other possibility's.
1. The EGR solenoid is bad
2. Other EGR passage is clogged
3. The wiring from the ECU to the solenoid is shorted
4. The ECU is bad.

First test, pull a vaccum on the EGR valve while the engine idles, If the engine stalls then you the Valve is working and the passage is clear.
Second test, unplug the solenoid and use 2 pieces of wire to provide ground and B+ from the battery to the solenoid. If the engine stalls then you know that the solenoid is working.
Third test, use a test light or multi-meter. Allos engine to reach normal operating temp. Unplug selnoid and raise rpm to 2500. If you recieve power on 1 pin and ground on the other than you know that the wiring and the computer are good and working. If you do not recieve power on either pin than check that same wire @ the ECU.
Good luck!

[RedtopTech]

EGR is used at part throttle acceleration and cruise to lower combustion temps in order to reduce oxides of nitrogen (NoX). I rec. that you get it working.

[!Zar!]

wire the oil pressure and engine light together
haha
assuming ur pre '94

pray your actual emission output is ok too.

Haha.

I do that all the time.


sshhhiiittt



OP: Don't cut anything. If you want to simply not deal with the light, take the bulb out of the cluster.

But smog techs will fail your car if the light doesn't illuminate when they turn your car off/on.

That's why you wire it to your oil light.

And then once you are driving and your oil/check engine light come on for real, you'll know you're fucked.

Just what a check engine light should do.

haha.

[SR_Elliott24]

You might as well go to a local car parts store and rent the little scanner tool and fix the problem.

Autozone will let you use theirs for free. Went down there with my buddies mustang and got the codes.

[kamikazekid]

all very good ideas and points. ill wire it to the oil light for smog then switch it back later.

[Rob's S14]

let me know if that works. i'm having the same problem too, with the egr code coming up. luckily i won't have to smog til september at the earliest.

[!Zar!]

Just spray a bottle of throttle body cleaner in to the egr.

Prior to smogging a car, it was reading 3000k+ nox.

After cleaning, it read 280 or something.

Huge ass difference.

[onepuff]

did you try and reset the ecu after you fixed the real problem. could be the code is just stored in the ecu memory