Fuel Injector - Correcting a Plugging Condition

Number: 86-226

Section: 6C

Date: MARCH, 1987
Subject: FUEL INJECTOR PLUGGING


Model and Year: 1985-86 CAMARO WITH PFI ENGINES (VIN CODE F)

1985-86 CORVETTE WITH PFI ENGINES (VIN CODE 8)
TO: ALL CHEVROLET DEALERS


In response to General Motors request for high-detergent fuels, almost all gasoline marketers now provide fuel which should prevent injector plugging. In addition to improved fuels, General Motors 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 1985-1986 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 attached chart provides correct part numbers for service applications.
INJECTOR PART NUMBERS

Use only in sets of eight for repair of plugged injectors


CAMARO ENGINE VIN CODE INJECTOR

1985-86 "F" 10077513


CORVETTE

1985 8 10077514
(Requires increased fuel pressure) Install Fuel Regulator P/N 17110874 Cold Start Valve P/N 17110860


1986 8 10077514

(Additional parts not required)


Use applicable Labor Time and Operation Number.