Yep, pretty similar codes to before:
MAF signal and flow too low
-Damaged unit (MAF is supposedly new, I cleaned with CRC two weeks ago. Previous mechanic saw MAF codes and replaced entire unit, but this obviously didn't solve the problem and I doubt the MAF is at fault)
-Leaking in system
-Contaminated throttle body
-Blocked intake system
Fuel Pressure Sensor signal too high
-Short to ground circuit
-Damaged temperature sensor (?)
Fuel Pressure signal too high
-Damaged fuel pressure sensor
-Damaged fuel pump control
These problems could very well be causing some or all of the hesitation/surging/shuddering that has lead me to believe my transmission could be compromised.
I am definitely replacing fuel filter and spark plugs this weekend. Not sure what to do about MAF and fuel pressure codes. Don't have a manometer setup to test the fuel pressure.
Should I just go ahead and replace: filter->fuel pressure sensor-> MAF (in that order) until it stops throwing codes?
Where should I look for leaks/blockages in the intake system?
Should I bother pulling out the throttle body to clean/inspect?
Anything else I'm missing?
PDF of VIDA readout included for the curious/especially helpful!!
edit: Couldn't find the ETM test Howard mentions on his site, so I took some screen shots of the fuel pressure and throttle position sensors. If potentiometer 2 is supposed to read high (notice pot. 2 is scaled to 114%), then the throttle looks fine. Less sure about the fuel pressure sensor, it dropped down quite a bit after idling for 30 seconds or so.
Going to replace spark plugs, fuel filter, and lower transmission mount this weekend. If that doesn't do it then I'll bring it to an independent to help diagnose MAF/intake issues, Fuel pressure sensor, throttle, or axles/other drive components.
7-20-16 check engine light on.pdf
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