Flashing check engine light after egr delete

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Jul 31, 2013 | 02:56 PM

Portcityls1

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Flashing check engine light after egr delete

My check engine light started flashing after I installed headers and did a egr delete on my 2000 trans am. Is this because I need to tune or what?

Jul 31, 2013 | 05:22 PM

Mike@Diablosport

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From: Central Florida

You are likely seeing misfires. Could be tuning, could be burned up O2 sensor wiring

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Jul 31, 2013 | 06:34 PM

LSX Power Tuning

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From: Brenham TX

I agree, blinking light is most likely miss-fire.

Jul 31, 2013 | 06:59 PM

Portcityls1

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Quote:

Originally Posted by Mike@Diablosport

You are likely seeing misfires. Could be tuning, could be burned up O2 sensor wiring

O2 sensors are brand new. Can it be something else causing misfires?

Jul 31, 2013 | 07:03 PM

jimmyblue

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From: East Central Florida

If your "delete" was only hacking and plugging the
plumbing, then your tune is pushing a lot of extra
advance in the light throttle regions, and will misfire.
Turning off the EGR functions in the tune, or at least
zeroing the EGR spark adders, is needed; maybe even
more spark table massaging than that. What the VE
table looks like on EGR cars, I haven't looked at but
it should be depressed when EGR valve is open, and
that could compound the problem with short fueling.