Code P0172 & P0175 problem
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Joined: Oct 2004
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From: Houston TX
Code P0172 & P0175 problem
I have a problem with this code coming up all the time and I need to know if it might be the fuel pump. My mechanic tested the fule pressure and that it was to spec but after the engine was shut off the fuel pressure dropped emmediately. He says it may be the fule pump or an injector.
Does anyone know how to test to see which it is and does anyone know how to test injectors to see if they are leaking?
Does anyone know how to test to see which it is and does anyone know how to test injectors to see if they are leaking?
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Joined: Aug 2000
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Mike, since those codes show rich on both banks, I would rule out a single injector leaking, although it still could be one leaking on each bank. It very well could be a bad fuel pressure regulator. If you pull the vacuum line to the FPR, and there is raw fuel present, then it's bad (and leaking fuel into the intake manifold).
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