Rough Idle HELP!

[02YukDenXL]

I saw a YouTube video with those tests the other day. I'm itching to hookup my new gauge and check things out. I'll definitely be doing this tomorrow. Thanks man!

 

[#1taho]

You should always use O2's and Fuel Trims (which are basically interpretad data from O2's) to diagnose drivability issues. They are a window into the engine.

I have to correct myself. I meant not look at the O2 as in replacing it till the last. Your correct it is a window to help see whats going on with your engine.

 

[ccapehartusarmyINF.(ret)]

my jedi powers are the window to my engine

 

[02YukDenXL]

Initial fuel pressure spike with KOEO was 57psi for a second or two before quickly settling off at 52 psi.

Idle fuel pressure fluctuated between 49-50 psi.

Fuel pressure in drive with foot in brake at 2100 rpm approximately 55-56 psi.

 

[SLCHOE]

Seems to be ok then. I'd move forward and check the cats.

 

[ccapehartusarmyINF.(ret)]

i hate cats they are evil creatures that can steal your soul

 

[02YukDenXL]

I ordered some Aero Kroil on Amazon to help free up the O2 sensors. I'm gonna buy a back pressure gauge to test my cats.

If I had one clogged cat, wouldn't the misfire only happen on one side? What are the odds that both cats are plugged?

 

[ccapehartusarmyINF.(ret)]

i would take this oppertunity remove the cats from the equation completely like i did with my tahoe
and as for passing emissions i just paid up my tabs two years out and id just cross that bridge when i got there as far as when it did infact come time for emissions
and there is several ways to keep yer post cat 02 sensors from throwwing a code

 

[02YukDenXL]

I'm not just going to remove my cats completely. If they're clogged then I'll be replacing them.

 

[#1taho]

I'm not just going to remove my cats completely. If they're clogged then I'll be replacing them.

How are you making out with you diagnoses ? You definitely have a tricky one!