Fuel Injector - Plugging
Number 86-6 (Gasoline)-68 Date 3/87Subject: FUEL INJECTOR PLUGGING
1985-86 FIREBIRD MODELS WITH
PFI ENGINES (ENGINE CODE F)
In response to GM's request for high-detergent fuels, almost all gasoline marketers now provide fuels which should prevent injector plugging. In addition to improved fuels, GM has released fuel injectors with increased resistance to plugging. The following steps are recommended to service port fuel injection conditions:
To correct injector plugging (all models and years):
1. Clean injectors, using tool J-35800.
2. Recommend the use of high-detergent fuel.
Any Additional Occurrences (1985-1986)
Injectors more resistant to plugging have been released in 1987 fuel rails with date codes after 12-5-86. These injectors cannot be used in 1985-86 manifolds. However, improved service injectors are available for 1985-86 vehicles that continue to have injector problems. These 1985-86 service injectors are of a different manufacturer and must only be used in complete sets of eight. The following chart provides correct part numbers for service applications:
INJECTOR PART NUMBERS
YEAR AND MODEL STD. SERVICE REPEAT PLUGGING
(Use as Req'd) (Use only in sets
of 8 and only for
plugging)
1985-86 Firebird 5.0L 17110872 10077513
1987 Firebird 5.0L 17111960
1987 Firebird 5.7L 17111961
Use applicable Labor Time and Operation Number.