96 M119 eng SL500,I have been having idle problems when hot only.
P0170+P0173 are left and right bank Fuel trim malfunctions.
Explanation is :self adaptation of fuel mixture "partial load"and or "closed throttle position" of rt and left cylinder bank at limit from engine control module (N3/10)
test step/remedy: 1)intake air leak
2)injectors
3)diaphram pressure regulator
4)ENGINE WEAR.
If I had a intake air leak would I have low Vacum?
would injectors throw faults p201 thru p208?
How to check Diaphram pressure regulator?
Engine wear?compression is good for 260K 180psi all 8cyl quiet running
Any help with where to start troubleshooting these codes and idle hot problem whould be appreciated John......................................

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88 W124 3.0
96 R129 119eng
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