Need help. Missing on two cylinders. Have spark. Have cleaned injectors. But still 2 dead cylinders. Have great compression. Anyone have this issue? Need some input to solve this one.
If mechanical compression is good, then it's spark, fuel, or air..
The 2.0L is a wasted-spark system, (2) coil packs, Cyls 1/4, and Cyls 2/3.
Check short HT Leads for resistors, if original: it should Ohm out @ 5k, +- .1k
Consider replacing spark plug wires and short HT leads if badly discolored or suspect.
Check the pigtail power lead from CPs ->motor wire harness & connectors for cracking / wear. The connectors on the pigtail lead brittle w/ heat and crack.
Run the Sportage at night / in dark, look for spark arcing.
Use an inline Spark Tester light for visual confirmation of spark firing to the cylinder if needed. Unbolt the Coil Pack(s) and place the tester in-line between the short HT lead and plug wire as needed. Confirm -all- plugs.
Injectors: use a mechanic's stethoscope and confirm each injector is firing.
Use a NOID light for visual confirmation if needed.
Confirm the injector(s) are seated properly, the air shroud hose is attached, and is in good condition / intact.
Air: confirm good airflow from the airbox / filter to the throttle body, confirm the metal intake plenum ->throttle body gasket is intact and seated properly, it can be installed mis-aligned.
inspect the exhaust manifold for any obvious cracks, leaks, hissing while running: confirm it is intact.
inspect all vacuum ports on the Intake manifold and hoses or plugs attached to each port: rule out a vacuum leak.
Edit: above are physical checks, use of an OBDII Scanner tool, examining sensor values, confirming B1S1 O2 sensor switching, and freeze-frame state of stored DTC code(s) may also help to locate the issue ..
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Above is where I would start if it was my ride..
If the two cylinders are one of the couples one-four or two-three then likely it is their coil issue, perhaps its connector is not well inserted. I know you said you have spark but if it is the case above the coil should be rechecked.
I assume you checked for spark by using an incandescent test light or putting a spark plug in the removed coil/boot and visually seeing spark. This is a good check but you need to remember that a removed coil might have been arcing through the boot when close to the cylinder head. I usually check spark output first then lay the coil down and use a test light to battery negative to pass over the length of the boot to see if the boot is shorting spark to ground.
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