docrocket1967

PROBLEM SOLVED SEE LATER POST

docrocket1967

Indo plan to change all the spark plugs tomorrow and check wires but im curious if a cracked plug will not throw a code and cause this issue

CMY SIX

great place to start, but if it was me, I'd plan on a "retune" also

Dano523

You lost me on the o2 sensors.

The pre-cat sensors and connectors should still be in play on the sides there where before, and the aft cat sensor connectors should not be connected to anything, nor the after cat sensors connected to the X pipe as well (holes get plugged with threaded plugs).

Hence the pre cat sensors are used for the motor to run correctly, while the aft cat sensors are only used to make sure that the cats are working correctly only (which you are not running). Hence in the tune, the aft cat O2 sensors will be turned off, leaving only the pre cat O2 sensors in play. In the mean time, the car is going to throw codes until the rear after cat O2 sensors are tuned off in the tune.

As for not running high flow Cats, not a wise choice, since the car is going to stink of unburnt fuel every stop light, and you will only lose about 2~4 hp total running high flow cats after the headers in the X pipe isntead.

And yes, you need a re-tune, since the headers will be pulling more exhaust (scavaging), and it going to cause the motor run lean in WOT, and maybe enough in closed loop when not at WOT that the motor can not adjust for instead.

docrocket1967

Thank you for the response and sorry for the confusion. Both of my pre-cat sensors are installed just as they should but not switched or anything like that. My two rears however i crossed at the xpipe. The car was previously tuned for the heads and cam and other small work done but never had exhaust before so Im not sure if the rears were thned out. They were there and there were holes in the xpipe for them so i reinstalled.


It instantly just kinda ran like crud right when i started it and its leading me to think plugs maybe wires, but its throwing two 02 codes.

Unreal

If you didn't pull plugs to swap headers, then 99.9% chance you cracked or messed up a spark plug. Start there.

docrocket1967

PROBLEM SOLVED

So I had ordered my AR headers from tsp and when i did i of course upgraded to buy the better gasket and 02 wire extensions.

When i was first installing the headers to make it easy i installed the 02 sensors on the headers and plugged them in to make it easy. Now TSP had only sent two wire extensions and i figured they were for the rear 02 sensors but in the process of removing the factory setup i hadnt paid a ton of attention to them but the extensions they sent obviously only plug into one of the styles of 02 plugs on each side. I at first thought they were the wrong extensions and they sent me extensions for the front and not for the rear but then i thought no maybe i was wrong so i installed everything and ran with the extensions they gave me which only were designed to be used with one plug on eah side that have the triangle type port not the square port.

Well i shouldve stuck with my gut instinct and questioned it when i had it all apart instead i ran with it and today i put the car back on the lift and realized that the extensions they sent were for the front which i didnt need and none for the rear. So i took the 02 sensors out of the xpipe and put them back up to the front and rerouted the wiring for the sensors to stay away from the headers and i ran the two i had up front back to the rear and left them unplugged.

Problem solved car now runs great and no issues at all. I got lucky and no cracked spark plugs either

Dano523

FYI, If you are going to run the rear O2's (don't know why since without a working cat, then are doing nothing but causing codes), don't swap the wires to the rear OS sensors over to the opposite sides.

docrocket1967

Twayneo1

if you are going to install a wide band 02 would you put it in the "before" cat plug, or the after cat plug?

EviLS7

Before cat plug.

docrocket1967