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Bosch +4's will work fine in the DOHC engine. I know several folks who run them without any problems.

Get the trouble codes and post them here. They will be formatted PXXXX, where XXXX will be a series of numbers. Make sure all the codes are readout if there are more than one.

Sportage front ends are very sensitive to proper wheel balance. If a wheel/tire combo is not properly balanced you will get wheel shake. I suggest having the front tires checked and balanced as required to start.
 

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P0101: Mass Airflow range/performance problem.

P0172: System too rich. (Caused by the MAF)

9 times out 10 the problem is not the mass airflow sensor itself. They rarely go bad. The electrical connector to the MAF develops corrosion and contact resistance over time which causes this problem. There are 2 solutions. One temporary and one a permanent fix. The temp fix is to unplug the connector and recrimp/clean the contacts. This should clear up the problem but eventually it will come back and you'll have to clean the contacts again. The permanent solution is to cut off the electrical connector from the wiring harness and solder the wires directly to the tabs on the MAF sensor itself. The problem will never reoccur.

Once you repair the connector disconnect the battery for about 10 minutes to reset the ECM. Start the engine and the CEL should go off and remain off.
 
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