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2001 Cadillac DeVille 4.6L Poor Idle Quality, Surge, Stall, MIL Lamp on
Posted to GM Driveability on 10/12/2005 13 Replies

This caddy has a rough, surging idle....constanly going from 500 to 650 rpm. It has codes 171 and 174 saying it is too lean. I have sprayed berryman all over it & found no vac. leaks, removed & plugged the egr, no change. .....EGO sensors all reading very low ...

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Message Closed w/FIX

car Vehicle Data

2001 Cadillac DeVille

VIN 1G6KD54YX1
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Surge, Stall, MIL Lamp On
OccursIdle, Intermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
Message Closed w/FIX

car Vehicle Data

2001 Cadillac DeVille

VIN 1G6KD54YX1
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Surge, Stall, MIL Lamp On
OccursIdle, Intermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)