Fuel System - Poor Performance Due To Injector Clogging: Overview
Bulletin No.: 03-06-04-030BDate: February 15, 2007
TECHNICAL
Subject:
Various Driveability Symptoms Due to Clogged Fuel Injectors, MIL/SES DTCs P0171, P0172, P0174, P0300, P1174, P1175 (Clean Fuel Injectors and/or Perform Injector Test With AFIT - CH47976)
Models:
2000-2007 GM Passenger Cars and Light Duty Trucks (Including Saturn)
2003-2007 HUMMER H2
2006-2007 HUMMER H3
2005-2007 Saab 9-7X
with 2.2L, 2.4L, 2.8L, 3.1L, 3.4L, 3.5L, 3.8L, 4.2L, 4.3L, 4.8L, 5.3L, 6.0L, 6.2L or 8.1L Engine (VINs F, D, 4, 5, T, 8, J, E, H, L, 6, K, S, X, V, T, M, N, U, H, Y, 8, G - RPOs L61, LN2, L43, LD9, LK5, LG8, LA1, LX5, LX9, L52, L36, LL8, LU3, LR4, LM7, LH6, LQ9, LQ4, LS2, L76, L92, L18)
and MULTEC(R) 2 Fuel Injectors
Supercede:
This bulletin is being revised to update the model years and models, the procedure (recommended specifically for MULTEC(R) 2 injectors) and recommend cleaning solutions and/or testing with AFIT - CH47976. Please discard Corporate Bulletin Number 03-06-04-030A (Section 06 - Engine/Propulsion System).
Condition
Some customers may comment on any of the following various driveability symptoms:
Extended Crank Time
Hard to Start
MIL/SES Illuminated with DTCs:
Hesitation
Lack of Power
Surge or Chuggle
Rough Idle
Light or Intermittent Misfire
Cause
Due to various factors, the fuel injectors may become restricted. Extensive testing has demonstrated that fuel related issues are the cause of clogged injectors. At this point, no specific fuel, fuel constituent, or engine condition has been identified as causing the restriction. The restriction causes the engine to operate at a lean air fuel ratio. This may either trigger the MIL to illuminate or the engine to develop various driveability symptoms.
Parts Information
Warranty Information (excluding Saab U.S. Models)
For vehicles repaired under warranty, use the table.
Warranty Information (Saab U.S. Models)
For vehicles repaired under warranty, use the table.
ڔ f:
� f:
Injector Worksheet
Disclaimer