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Discussion Starter · #1 ·
So I got a check engine light, traction control light, "service stabilitrak". Heater blows cold air, engine sputtering, stalled on me right after starting, and codes P0171 P0302 P07E8 P0A43 P2310 P0300.

All of this happened suddenly except the heater, which was just slow to warm up (I figured because of the weather here, it was negatives a few days ago).

Any ideas? Thanks in advance.
 

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2011 1.4L 2LT
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p0302 and p0171 are gonna indicate your issue. Sounds like everything else is just an accessory to the real issue - your engine is running lean and your 2nd cylinder is misfiring. I'd say check the plug, wire, injector, and compression for cylinder #2. Other than that, it's equally possible there is a vacuum or exhaust leak possibly in the intake or exhaust manifold gasket for cylinder #2.
 

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2014 LT program car, Pull Me Over Red, 1.4T Auto
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https://static.nhtsa.gov/odi/tsbs/2016/MC-10112283-9999.pdf

Tips to ensure no misfires occur:

Remove the coil pack. If the boots are stuck on, use a small screwdriver or pick with some dielectric grease on it to go around the outside of the boot and then possibly the inside of the boot to help aid in removal.

Remember to (p)re-gap your plugs to .028, (0.24 if tuned)

Set gap with the black portion of this tool.



To increase the gap size bend the ground strap up to the desired height. DO NOT LET THE GAPPING TOOL TOUCH THE IRIDIUM CENTER ELECTRODE OR PORCELAIN.

Measure the gap with feeler gauges.



Throw this away.





Torque to 18 ft-lbs with no anti-seize on the threads of a stock type plug.

Ensure the boots have no rips/tears or holes in them, lightly coat them with dielectric/silicone grease and make sure the resister springs are clean and not caught up in the boots when you install them.

If the plugs look bad, consider these:

-BKR8EIX-2668 (iridium plugs), ~$25, expect ~10-15k regaps on these, ~40-50k overall life.
-BKR7E-4644 (nickel/copper plugs), ~$8, expect 15-25K out of these plugs, with a regap or two required at 5-8k intervals on stock tune.

Read Hesitation Gone! for more info on the plugs.


A good replacement coil is the MSD Blaster OEM Replacement Coilpack 8236

How-To: Remove and Replace the Coil Pack and Spark Plugs.

While you are in there, if you have a cheap endoscope, look at the pistons. This can also tell you many things.

Cheap Compression set
 
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