I have:
Changed plugs
Used a can of Seafoam
Poured 2 cans of B12 into a full tank
Cleaned the EGR, IAC, and throttle body
Replaced a rear oxygen sensor (light still shows bank 1 and bank 2 rear sensors)
Checked fuel pressure (holds at 55 psi)
Changed fuel filter
Fixed a cracked line going to pressure regulator
Replaced the pressure regulator and intake gaskets
The intake gaskets seem to have helped but there is still somethng wrong. It has a tiny surge while idling, but not enough to show on the tachometer. Also, the check engine light only comes on at highway speed and full throttle. Here is a freeze frame:
Code P0137
100% throttle
3399 RPM
35.6% Engine Load
79.23 GR/Sec MAF
MAP sens 98 KPA
Coolant temp 199*
Short term fuel trim 1 0.8%
Long term trim 1 24.2%
Short term trim 2 0.8%
Long term trim 2 23.4%
Short term trim 3 -96.7%
Long term trim 3 -55.1%
Short term trim 4 -89.7%
Vehicle speed 80 mph
Fuel system 1 OPEN1
Fuel system 2 OPEN1
Thank you
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Monday, August 3rd, 2009 AT 2:27 PM