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Subject: "New Cat-back and Cat converter, now I get high rpm miss-firing." Previous topic | Next topic
Drewcool2Sep-12-03 03:14 PM
Member since May 28th 2003
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#59106, "New Cat-back and Cat converter, now I get high rpm miss-firing."


          

Just installed my thermal research cat-back, and catco high flow cat converter. Overall I got some nice gains over stock. But now I have a problem. When I floor it accelerating above 5K RPMs, I get mild spitting, and miss-firing. I never noticed this problem until I put my exhaust on. I don't know if its a coincidence...
But I hooked up my logger, just to see how my ignition timing is all over the place. Also, it doesn't appear to be running too lean. My O2 sensor readings stay around .8800-.9300V. (Or is that bad?)

What causes my ignition timing to change so much? Even at idle, looking at a graph, my ignition timing is jumpy. I'm assuming this is related to my high rpm miss-firing.

I have new msd coil pack, wires, and NGK plugs.

  

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Drewcool2Sep-13-03 09:55 AM
Member since May 28th 2003
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#59145, "RE: New Cat-back and Cat converter, now I get high rpm miss-firing."
In response to Reply # 0


          

Anyone know what causes my ignition timing to be jumpy, and un-smooth?

  

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TwisteSep-13-03 10:24 AM
Old School 2GNTer
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#59147, "RE: New Cat-back and Cat converter, now I get high rpm miss-firing."
In response to Reply # 1




          

try reseting your ECU one time...mine doesnt do it...


2003 Acura RSX Type-S
15.042 @ 93.06
Devon
Creator of one of the longest and most controversial posts in 2gnt history...
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JWoodleySep-14-03 12:01 PM
Member since Mar 27th 2003
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#59207, "RE: New Cat-back and Cat converter, now I get high rpm miss-firing."
In response to Reply # 2




          

umm, NGK's come pregapped, but im sure you checked them before u put em in, riiiight? could be your problem. emoji goodluck.

  

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