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Discussion Starter #1
anyone out there w/ a race header and flexpipe? i have the focussport race header and flexpipe and i noticed the other day that my check engine light went on. first thought that came to mind was b/c i dont have a catalytic convertor. however, i've had the header on for several weeks and it never went on till the other day. anyone else get a check engine light w/ their race header and flexpipe? thanks
 

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It's not the flexpipe. I don't have the race header, I have the shorty but have read from those that do that in order to eliminate/fool the CEL you need an o2 cheater. I know you can buy them from many of the popular suppliers for focus parts.
 

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Discussion Starter #3
ah ok. thanks.
 

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I am guessing you do not have an 02 cheater.

I think its kinda irresponisble to sell a part and not add something like that in.
 

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Discussion Starter #5
no i dont have one. guess i gotta buy one. took the car to FORD today to get my recalls done and the light checked. they said it was b/c of my intake.

i agree w/ you focaltech that they should sell the part w/ it. oh well.
 

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what happen when the sensor send a wrong signal to the ecu?
to lean or rich? does this cause the ecu to "re map" the fuel ratio?
b'c of the lean/rich readings?
 
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