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Whats up guys..
buddy of mine has a 96 F150 with the 351 in it, MAF.. He's throwing two codes, P171 and P174, both system too lean codes ive been told..
He's replaced all three o2 sensors, did plugs, replaced EGR Valve and EGR tube, PCV valve, MAF Sensor.. did quite a bit of work and he still has the codes. He did have them cleared but they came back..
any ideas?
buddy of mine has a 96 F150 with the 351 in it, MAF.. He's throwing two codes, P171 and P174, both system too lean codes ive been told..
He's replaced all three o2 sensors, did plugs, replaced EGR Valve and EGR tube, PCV valve, MAF Sensor.. did quite a bit of work and he still has the codes. He did have them cleared but they came back..
any ideas?
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