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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Pontiac Firefly car and truck
repair procedures including Pontiac engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your 1991 Pontiac Firefly automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1991 Pontiac Firefly
- 1991 Pontiac Firefly 1.0 L3 GAS, CC:993, CID:61, Fuel Injection, Aspiration:61, Engine VIN:, Desg:2
- 1991 Pontiac Firefly 1.0 L3 GAS, CC:993, CID:61, Fuel Injection, Aspiration:61, Engine VIN:, Desg:6
- 1991 Pontiac Firefly LE 1.0 L3 GAS, CC:993, CID:61, Fuel Injection, Aspiration:61, Engine VIN:, Desg:6
BRAKE SERVICE PROCEDURES FOR 1991 Pontiac Firefly AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Pontiac Firefly cars and light trucks from 1990+.
POWER BRAKE UNITS, GENERAL MOTORS -> GIRLOCK SINGLE DIAPHRAGM TYPE -> Assembly -> Brakes Grab -> Brakes Slow To Release Or Drag -> Brakes Slow To Respond -> DESCRIPTION -> Disassembly -> Excessive Pedal Effort -> OVERHAUL -> TROUBLESHOOTING
Vehicle: 1991 Pontiac Firefly LE 1.0 L3 GAS
DESCRIPTION
This booster is a single diaphragm, vacuum suspended unit with a lightweight cast alloy housing,Fig. . Vacuum is applied to the front and rear housings. When the brake pedal is released, negative pressure is equalized on both sides of the diaphragm and power piston assembly. Spring tension holds the piston at the rest position. When the brakes are applied, the atmospheric port in the power piston is opened. Negative pressure in the front chamber pulls the diaphragm and vacuum piston assembly, reaction disc and output rod forward. Pressure on the master c...
CLICK HERE TO GET FULL ACCESS TO 1991 Pontiac Firefly BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Pontiac Firefly AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Pontiac Firefly cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> General Information -> INSPECTION OF CALIPER
Vehicle: 1991 Pontiac Firefly LE 1.0 L3 GAS
Should it become necessary to remove the caliper for installation of new parts, clean all parts in alcohol, wipe dry using lint free cloths, using an air hose to blow out drilled passages and bores. Check dust boots for punctures or tears. If punctures or tears are evident, new boots should be installed upon reassembly.
Inspect piston bores for scoring or pitting. Bores that show light scratches or corrosion can usually be cleaned with crocus cloth. However, bores that have deep scratches or scoring may be honed, provided the diameter of the...
CLICK HERE TO GET FULL ACCESS TO 1991 Pontiac Firefly BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Pontiac Firefly AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Pontiac Firefly cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEM, GENERAL MOTORS -> MASTER CYLINDER REPLACEMENT
Vehicle: 1991 Pontiac Firefly 1.0 L3 GAS
- Disconnect wire connector from brake warning pressure switch.
- Disconnect brake lines fro...
CLICK HERE TO GET FULL ACCESS TO 1991 Pontiac Firefly BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Pontiac Firefly AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Pontiac Firefly cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> General Information -> INSPECTION OF CALIPER
Vehicle: 1991 Pontiac Firefly 1.0 L3 GAS
Should it become necessary to remove the caliper for installation of new parts, clean all parts in alcohol, wipe dry using lint free cloths, using an air hose to blow out drilled passages and bores. Check dust boots for punctures or tears. If punctures or tears are evident, new boots should be installed upon reassembly.
Inspect piston bores for scoring or pitting. Bores that show light scratches or corrosion can usually be cleaned with crocus cloth. However, bores that have deep scratches or scoring may be honed, provided the diameter of the...
CLICK HERE TO GET FULL ACCESS TO 1991 Pontiac Firefly BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Pontiac Firefly AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Pontiac Firefly cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEM, GENERAL MOTORS -> TROUBLESHOOTING -> CHECKING FOR FLUID LEAKAGE -> ROAD TESTING
Vehicle: 1991 Pontiac Firefly 1.0 L3 GAS
When troubleshooting the hydraulic brake system, perform the following checks and inspections as outlined below. If problem still exists within system, refer toFig. first, then toFig. as necessary.
ROAD TESTING
When testing brakes, ensure the road is level and dry. Test brakes at both light and heavy pedal pressure. Do not lock up brakes or slide tires during a brake test.
Check the tires on the vehicle before performing a brake test. Tires should be equally inflated, identical in size ...
CLICK HERE TO GET FULL ACCESS TO 1991 Pontiac Firefly BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Pontiac Firefly AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Pontiac Firefly cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEM, GENERAL MOTORS -> MASTER CYLINDER REPLACEMENT
Vehicle: 1991 Pontiac Firefly 1.0 L3 GAS
- Disconnect wire connector from brake warning pressure switch.
- Disconnect brake lines fro...
CLICK HERE TO GET FULL ACCESS TO 1991 Pontiac Firefly BRAKE SERVICE PROCEDURES
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