P0307 and stability track errors are back…
my plugs and wires have ~20k on them.
Also getting the attached p0899 error
my plugs and wires have ~20k on them.
Also getting the attached p0899 error
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P0307 and stability track
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Stabilitrac will shut down if it senses excess vibration and if the ABS system is wonky. I’ve had it kick off the stabilitrac system on a rough gravel road. A misfire might be just enough of an issue to trigger this, depending on how frequently it is misfiring.
What year is your vehicle?
What year is your vehicle?
mrhp
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The misfire will disable the Stability system. Fix the misfire and Stability warning will be gone as well.
I thought I had it fixed when I pulled 7 and gapped it last time….
Plug doesn’t look too bad. What else should I check?
40K on them ??
change plugs - don't "gap" irridium plugs
buy the correct ones to begin with and install them
Change Plug wires...
Then see if that changes your misfire on cyl 7.....
IF not, try changing around coil packs to see if misfire follows
Proceed
change plugs - don't "gap" irridium plugs
buy the correct ones to begin with and install them
Change Plug wires...
Then see if that changes your misfire on cyl 7.....
IF not, try changing around coil packs to see if misfire follows
Proceed
mrhp
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^^^ Good info
What is question on 40k?
Got them from orielys oem ac delco
Gap was maybe 1 or two thou off I forget, barely moved the ground. That maybe didn’t do anything to solve.
Changing around coil packs, I’ll have to look what this means. I think I need to go here next
Saw this somewhere else, this what you mean @froggy
“if you have a misfire on cylinder 7...swap a coil, wire and plug with one from a non misfiring cylinder. the misfire will either follow the coil/plug/wire or stay on #7. if it follows...replace plug/coil/wire. If it stays on 7...do a compression check on #7. If it’s low, you have a mechanical problem on #7. If you have an afm engine (no idea what engine you have) 7 is a afm cylinder and it may have a collapsed lifter.”
“if you have a misfire on cylinder 7...swap a coil, wire and plug with one from a non misfiring cylinder. the misfire will either follow the coil/plug/wire or stay on #7. if it follows...replace plug/coil/wire. If it stays on 7...do a compression check on #7. If it’s low, you have a mechanical problem on #7. If you have an afm engine (no idea what engine you have) 7 is a afm cylinder and it may have a collapsed lifter.”
alright.. ill admit I’m an tyf newbie…
I was checking 6…
here is 7
That white as you probably know is hard…
What does this signal to you?
I was checking 6…
here is 7
That white as you probably know is hard…
What does this signal to you?
Fuel deposits. That’s the result of ongoing misfires, in my opinion.
#7 is in direct line of fire for oil in the intake manifold. You most likely have the early design of Driver’s side valve cover. Might invest in a catch can and get the redesigned valve cover to reduce the amount of oil you’re getting sucked into the intake through the PCV.
Yup, and oil deposits. Certainly have a smoking gun there. Mine does the same thing on #7. You can clean that one off, or better off replace it and go from there.
Is you AFM bypassed or active?
I am getting a new plug today. My guess is the errors will clear, but... what was the cause? would be an open question still....
AFM? active fuel management? Not sure there, nobody has done it under my watch. Looking up how to check.
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It looks like most if not all of my plugs have a little oil on the threads. Would this be from something like a leaky valve cover?
are the valve covers a difficult job?
Not a leaky valve cover.
The two main culprits is oil getting sucked into the intake through the PCV port on the DS valve cover. The redesigned them sometime around the 2009/2010 model year (my memeory is fuzzy) and changed how the PVC port is baffles to eliminate oil getting sucked into the intake. #7 takes the brunt of the oil issue because it is at the rear of the intake and the flow of air pushed the oil vapor to the back.
It’s not uncommon for folks to get a decent amount of oil out of an intake when they remove them and dump the oil out of it. I know I did when I removed it in my 2007. Many threads/posts here discussing the new valve cover design. @donjetman
The other common thing is bad valve seals.
Changing out a valve cover is not a difficult job. Just takes some time to remove some stuff so you can get to them.
Valve seals on the other hand are a little more involved.
I’d see about getting a new valve cover and/or a catch can installed and see what that does for you.
That's great! Should last you a while. I have to go though this every 3-4 years because my #7 cylinder is whooped. I have the AFM bypassed with Range device, updated valve cover and catch can. But over 350K on the motor so she has a bit of blow by still. Another old wives tale on these is the oil rings on the pistons clog and cake up and provide another way for oil to contaminate the combustion area.
