You may be developing a slight misfire in the engine. Tell me more about what you're driving, year, make, model and engine size. Also tell me if the check engine light comes on.
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Okay, if the system is running lean, it's not the O2 sensors' fault or thr plugs. The first thingn I wouldm test would be the MAF sensor ouput. Here's a scop shot of a good one. This component can cause lean conditions.
Sure can, we need to find out what is causing this lean condition and this is the best place to start.
Try cleaning it first, and if it helps you're good. Most of the time the problem is a defective MAF though.
It first needs to be tested, then the part is about $150.00 the labor is only 20 minutes.
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