LOL @ Emissions

[_Onyx_Wolf_]

Took the race car through and instantly got dirty looks lol I passed the ob2 scan even with cam longtubes and no cat straight pipe. Although he failed me because I had red secondary halos and he saw black smoke coming from the exhaust. The car was struggling to keep idle the whole time so I’m not sure what’s going on what could be causing it to run rich?

[Greenhornet2]

Can be lots of things. Bad o2s. Exhaust leak at the header, vacuum leak, maf, map. Leaking injector, coolant temp sensor Look at your fuel trims, watch your o2s voltage, make sure it's going into closed loop coolant temp ect

[_Onyx_Wolf_]

Originally Posted by Greenhornet2

Can be lots of things. Bad o2s. Exhaust leak at the header, vacuum leak, maf, map. Leaking injector, coolant temp sensor Look at your fuel trims, watch your o2s voltage, make sure it's going into open loop coolant temp ect

I have no cats with no o2 sensors lol and I just fixed a header gasket leak as well as a crank position sensor. Haven’t changed my air filter and spark plugs with 60k miles prolly on them. My filter is really black would that cause it to run rich?

[InFiD3ViL]

Originally Posted by _Onyx_Wolf_

I have no cats with no o2 sensors lol and I just fixed a header gasket leak as well as a crank position sensor. Haven’t changed my air filter and spark plugs with 60k miles prolly on them. My filter is really black would that cause it to run rich?

Yes, a dirty/restrictive air filter can cause a rich condition. Black exhaust can be a symptom of a rich condition. I used to leave black soot stains on the walls at my job when one of my O2 sensors started going bad.

Also, you should at least have front O2 sensors, cats or not. The ECU needs them for proper fuel trimming. If it goes on long enough you can also foul your plugs. Change your filter and let that engine breath.

[_Onyx_Wolf_]

Originally Posted by InFiD3ViL

Yes, a dirty/restrictive air filter can cause a rich condition. Black exhaust can be a symptom of a rich condition. I used to leave black soot stains on the walls at my job when one of my O2 sensors started going bad.

Also, you should at least have front O2 sensors, cats or not. The ECU needs them for proper fuel trimming. If it goes on long enough you can also foul your plugs. Change your filter and let that engine breath.

Will do thanks and also I popped the hood and found this plug unplugged going to the intake. as well as this line that is broken off from a while ago but I think that was for the npp exhaust not sure

[Greenhornet2]

Hmmm, that looks like an evap line and the thing that was unplugged looks like the evap purge solenoid. As long as the disconnected house is the one that goes to the tank and not the intake it shouldn't cause an engine issue.
You also, do have front oxygen sensors.

[_Onyx_Wolf_]

Originally Posted by Greenhornet2

Hmmm, that looks like an evap line and the thing that was unplugged looks like the evap purge solenoid. As long as the disconnected house is the one that goes to the tank and not the intake it shouldn't cause an engine issue.
You also, do have front oxygen sensors.

Close examination there seems to be a hole or something broke off what sensor is this?

[Greenhornet2]

That is the evap purge solenoid valve.

[_Onyx_Wolf_]

Originally Posted by Greenhornet2

That is the evap purge solenoid valve.

Gotcha I called my tuner and he said he tuned out the purge valve any how so it’s not even active lol and also told me to drive the car some more to let the ecu relearn the idle curves

[Badbubba]

Originally Posted by InFiD3ViL

Yes, a dirty/restrictive air filter can cause a rich condition. Black exhaust can be a symptom of a rich condition. I used to leave black soot stains on the walls at my job when one of my O2 sensors started going bad.

Also, you should at least have front O2 sensors, cats or not. The ECU needs them for proper fuel trimming. If it goes on long enough you can also foul your plugs. Change your filter and let that engine breath.

How would a dirty air filter cause a rich condition? The MAF measures the amount of air and the front O2s monitor and provide feedback in closed loop which adjusts the fuel trims, STFT and LTFT. Can't even see it happening in open loop, which is at cold start up and WOT, due to the LTFTs. Unless the tune is really off. Also, iirc, oem open loop starts >75% throttle. So the emissions inspection should be in closed loop. If the air filter is so dirty that it limits air flow significantly, then a CEL should be thrown, due to alarm limits of the fuel trims. I believe it's greater than +/- 15 for LTFT. The tune could be rich due to the specs of the cam, allowing for a downstream gas smell/rich condition. Especially with no cats.

[_Onyx_Wolf_]

Originally Posted by Badbubba

How would a dirty air filter cause a rich condition? The MAF measures the amount of air and the front O2s monitor and provide feedback in closed loop which adjusts the fuel trims, STFT and LTFT. Can't even see it happening in open loop, which is at cold start up and WOT, due to the LTFTs. Unless the tune is really off. Also, iirc, oem open loop starts >75% throttle. So the emissions inspection should be in closed loop. If the air filter is so dirty that it limits air flow significantly, then a CEL should be thrown, due to alarm limits of the fuel trims. I believe it's greater than +/- 15 for LTFT. The tune could be rich due to the specs of the cam, allowing for a downstream gas smell/rich condition. Especially with no cats.

Did a hard reset to the battery and so far so good besides the service power steering/stabilitrak