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Q: I have a check engine light on and the code number is po 171 on 2005 Volvo V50

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i clear the check engine light , but the light came back on . right away , after clearing it . runs goods .when it is cold it chogs for a minute . i also have code 171 191 190 101 026, but the only that came back right away is 171, Thank You
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FIRST, WITHOUT THE ENGINE ON CHECK ALL YOUR VACUUM LINES AND CONNECTIONS FOR CRACKS OR JUST NOT BEING CONNECTED. THEN START THE CAR AND LISTEN FOR A HISSING SOUND. IF EVERYTHING IS NORMAL SHUT OFF THE CAR AND UNPLUG ANY CONNECTOR YOU CAN FIND ON THE ENGINE AND RECONNECT. DO NOT BREAK THE CLIPS. THEN LOOK AROUND THE ENGINE COMP. AND LOCATE WHERE THERE ARE WIRES BOLTED OR SCREWED TO THE ENGINE OR THE BODY. TAKE THEM LOOSE AND CLEAN ALL SURFACES WITH A WIRE BRUSH OR FINE GRIT SANDPAPER AND REATTACH TIGHTLY BUT DO NOT BREAK THE BOLTS BY OVER-TIGHTENING. YOU CAN ALSO RUN SOME INJECTOR CLEANER IN THE FUEL, BG CHEMICAL'S 44K IS ONE OF THE BEST. GOOD LUCK
i run the engine and sprayed carb cleaner on the , intake manifold and the rpms did not increase. The car runs bad when it is cold after about 2 mins , seams to run better . but i still think it has a miss fire . just i need to remove the upper manifold . to get to the plugs and coils.i just want to get parts from the volvo dealer. thank you Ray
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