Do I?

[Opontee]

On a 94 v-6 firebird, do I have to disconnect the battery for a few minutes to reset the check engine light (computer)?

Problem: Light comes on randomly. I had it checked and was told the EGR valve was bad. I replaced it last night (inspection due today). Driving to work this morning, light came on again. Usually only does it on decel. I have changed O2's, IAC,....well the list goes on. At $39.75, I dont' want to have to pay for another inspection fee. Thanks.

Oh yea, I dont' know exactly what codes are thrown. I just want to know if the battery needs to be disco'd to reset.

[bigbrian442]

Re: Do I?

Yes, but the EGR code on that motor usually means the passage from the intake plenum to the EGR valve is clogged.

[Opontee]

Re: Do I?

I have cleaned it out before, not to long ago. Wasn't plugged up. We will find out soon if disco'n the battery helped with the code.

[Slowside]

Re: Do I?

So what happened?????

[Opontee]

Re: Do I?

First Nox standard is 821 mesaured at 1262 on the 25 mph test

Disco'd the battery and reset the comp. Light does not come on anymore. Went back for a retest. Got worse.

Nox went to 1860 @ 25 and 907 standard at 15 measured at 2493. And the CO% standard of .67 @ 15 mph measured @ .71.


Wonder know if the cat isn't bad. I had it replaced a few years ago. Got some bad gas at the beginning of the summer and the cat was glowing red in about 5 miles.

[Opontee]

Re: Do I?

Ended up being the EGR passage in the intake was plugged shut. Took me 2 hours to get it cleaned out.

[Rob Bell]

Re: Do I?

Glad you got it figured out. What about the cat? Did you replace it? I think that by the time the cat is glowing red, the internals are melted down.

[Opontee]

Re: Do I?

Not this year. Probably have to do it before I get it inspected next year. Runs great. Gets 26 on the highway. Just rolled 286,000 miles.