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2003 Cadillac DeVille 4.6L Poor Idle Quality, Misfire
Posted to GM Driveability on 6/12/2006 13 Replies

car came in without a mil lit. codes p0171,p0174,p0300,p1574 present. replaced spark plugs and boots, bg induction. car idled great. test drive recreated miss. no codes stored, miss fired over 300 times in a short time. every cylinder miss fire has a differant...

13 Replies Received (View Replies)

  Related Documents & Media  2003 Cadillac DeVille

 
Message Closed w/FIX

car Vehicle Data

2003 Cadillac DeVille

VIN 1G6KD54Y43
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / MULTI PORT
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursHot, Idle

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected
P1574Stop Lamp Switch Circuit Malfunction
Message Closed w/FIX

car Vehicle Data

2003 Cadillac DeVille

VIN 1G6KD54Y43
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / MULTI PORT
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursHot, Idle

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0300Multiple Misfire Detected
P1574Stop Lamp Switch Circuit Malfunction