Flashing check engine light after egr delete
07-31-2013, 02:56 PM
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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?
07-31-2013, 06:59 PM
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07-31-2013, 07:03 PM
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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.
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.
