O/R H pipe, MIL elimantors and Check Engine Light

trailblazr81

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May 17, 2003

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Hollister, Cali

Nov 11, 2005

#1

• Nov 11, 2005

• #1

Well Ive driven the car for about three days after the O/R H and Mil Eliminators, and the Check Engine Light came on. I had just left home so I went back and disconnected the battery for a couple minutes. Then drove it for almost an hour, seems ok. Anyone else have a problem with check engine light coming on with the MIL eliminators??

Also does this also mean its going into LIMP mode where it pulls timing and fatten's up the mixture. I can live with the dash light for a li'l bit but would hate to be far from home and it not running right.

 

timeless2

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#2

• Nov 11, 2005

• #2

You will run in limp mode. Did you make sure you got all the o2 connections TIGHT?
What kind of MIL eliminators are you using?

 

trailblazr81

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Hollister, Cali

Nov 11, 2005

#3

• Nov 11, 2005

• #3

BBK MIL eliminators out of Jegs. Pretty sure the O2 sensors are tight.

 

Mossberg

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Jul 21, 2003

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ATL, Shawty

Nov 11, 2005

#4

• Nov 11, 2005

• #4

My light has been on for ages and still get the same performance and gas mileage.

 

timeless2

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#5

• Nov 11, 2005

• #5

trailblazr81 said:

BBK MIL eliminators out of Jegs. Pretty sure the O2 sensors are tight.

Click to expand...

I have those same ones. I would check all of your connections again. Did you get the o2's mixed up during the install (front/rear)?

Then, do another reset of the PCM.

 

trailblazr81

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#6

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• #6

I made sure I only swapped one at a time so as to not mix 'em up. If the light comes on again I'll crawl underneath and make sure they are all tight. Maybe one got loose from the heat cycling of the exhaust?? I just thought it odd it was the third day I drove it that the light came on. This was the first cold early morning drive I did with it, and it came on within a mile from my house...

 

sgarlic

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Apr 21, 2001

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Nov 11, 2005

#7

• Nov 11, 2005

• #7

What's the code coming up? Mine did almost the same thing.. could drive for 20-25 miles then it would come on.. it was from a wire splice not being tight, although yours could be something else. The code would help narrow down where to look.

 

trailblazr81

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Nov 11, 2005

#8

• Nov 11, 2005

• #8

Dunno what code, it happenned on my way to work, so I wont be able to check the code til tonight or tomorrow. crapola

 

jstreet0204

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Winston Salem, NC

Nov 11, 2005

#9

• Nov 11, 2005

• #9

First, you won't run in limp mode if the rear o2's are throwing the codes. Second, as sgarlic said, make sure the code is related to the rear o2's, otherwise you may be chasing your tail.

 

timeless2

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#10

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jstreet0204 said:

...if the rear o2's are throwing the codes. Second, as sgarlic said, make sure the code is related to the rear o2's, otherwise you may be chasing your tail.

Click to expand...

What else might it be, if the only recent change was to the emissions system?

 

trailblazr81

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Hollister, Cali

Nov 11, 2005

#11

• Nov 11, 2005

• #11

I'll have to check when/if the check engine light comes on again, but I havent done anything else to this car for a while. And its never happenned before. amnit:

Things were so much easier when all you had to deal with was a carberator and mechanical fuel pump. And you could sit in the engine compartment while wrenching...