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2001 GMC Safari Support Question

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Question posted by timothyburris1969 on July 11th, 2014

Po306 Engine Code

why is it still throwing engine code after replacing plugs, wires, cap, rotor, & dist.?

Current Answers

Answer #1: Posted by TechSupport101 on July 12th, 2014 2:48 AM
This answer was accepted by the poster of the original question.
TechSupport101

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Hi. Also do check the Shaft Play - however, you are most likely looking an issue with the #6 Cylinder (misfiring issues possible linked to a vacuume leak). One had luck with upon replacing the intake gasket.

Related Manual Pages

Owner's Manual - Page 6

...'d) Service and Appearance Care Section 6 Fuel Checking Fluids and Lubricants Engine Air Cleaner/Filter Brakes Bulb Replacement Windshield Wiper Blade Replacement Tires and Wheels Appearance Care Electrical System/Fuses and Circuit Breakers Capacities and Specifications Normal Maintenance Replacement Parts Maintenance Schedule Section 7 Scheduled Maintenance Owner Checks and Services Periodic...
Owner's Manual - Page 45

...about the air bag system. See your dealer for the right front passenger's air bag. NOTICE: If you 'll need to replace the air bag module in another crash. Improper service can mean that your air bag system won 't be there to inflate ... commands air bag inflation and driver's safety belt usage at deployment. The module also records speed, engine rpm, brake and throttle data. 1-32
Owner's Manual - Page 91

...your vehicle, any remaining transmitters with the horn symbol on . When the dealer matches the replacement transmitter to your dealer. Each vehicle can be in PARK (P) or NEUTRAL (N) for 30 ... will go on . If the engine is lost transmitter will not unlock your dealer has coded the new transmitter, the lost or stolen, a replacement can have only two transmitters matched ...
Owner's Manual - Page 98

... for the first 200 miles (322 km) or so. See "Towing a Trailer" in . Remember to restart the engine. See your dealer. D Don't drive at this breaking-in . During this time your speed at 55 mph (88 ...Your vehicle is equipped with new linings can mean premature wear and earlier replacement. If the engine is turned to check the fuses (see "Fuses and Circuit Breakers" in the long run if...
Owner's Manual - Page 102

... an electrical shock. The dealer can help. Plug it away from moving engine parts. Turn off the engine. 2. You could overheat and cause a fire. Also, the wrong kind of the engine compartment, near the power steering fluid reservoir. 3. CAUTION: Plugging the cord into an ungrounded outlet could be plugged in a minimum of trying to starting your...
Owner's Manual - Page 107

... on a hill, see "Towing a Trailer" in the Index. That section shows what to do first to replace them, and you are towing a trailer and are parking on can roll. You may have left the engine running, the vehicle can be dangerous to get out of your rear brakes to overheat. To be...
Owner's Manual - Page 136

...for extended periods will drain your dealer for additional information on the power accessory plugs. This device complies with Part 15 of the device. These circuits are protected... current levels. This device complies with RSS-210 of the engine cover. Accessory Power Outlets You can plug accessory electrical equipment into accessory power outlets. Two accessory power outlets...
Owner's Manual - Page 144

...or when one of the warning lights comes on and stays on briefly when you start the engine just to let you know they're working. Speedometer and Odometer Your speedometer lets you see ...). Warning lights and gages can be set the trip odometer to cause an expensive repair or replacement. Gages can tell you how far your warning lights and gages. Often gages and warning lights...
Owner's Manual - Page 150

.... An emission control system NOTICE: Modifications made to the engine, transmission, exhaust, intake or fuel system of your vehicle or the replacement of the original tires with this light on, after a...lead to pass a required Emission Inspection/Maintenance test. malfunction has been detected on and the engine is possible. 2-71 If the Light Is Flashing The following may not run as it ...
Owner's Manual - Page 152

... help your battery has run down. If you have recently replaced your battery or if your vehicle pass an inspection: Your vehicle will not pass this inspection could prevent you have done this inspection if the SERVICE ENGINE SOON or CHECK ENGINE light is designed to evaluate critical emission control systems during normal...
Owner's Manual - Page 235

... this time, the coolant level inside the radiator filler neck may be lower. 6. Start the engine and let it run until the level reaches the base of the filler neck, reinstall the pressure cap. Then replace the pressure cap. By this . 5-17 At any time during this procedure if coolant begins to flow out...
Owner's Manual - Page 253

... Transmission Fluid All-Wheel Drive (If Equipped) Rear Axle Engine Coolant Radiator Pressure Cap Power Steering Fluid Windshield Washer Fluid Brakes 6-35 6-36 6-42 6-43 6-51 6-51 6-54 6-56 6-57 6-57 6-58 6-59 6-59 6-60 6-68 6-69 Battery Bulb Replacement Windshield Wiper Blade Replacement Tires Appearance Care Cleaning the Inside of Your Vehicle Cleaning...
Owner's Manual - Page 255

..., parts can later break or fall off. You could be easily confused. In Canada, look for better vehicle performance and engine protection. D Be sure you have sufficient knowledge, experience, the proper replacement parts and tools before adding equipment to the outside of your vehicle. If you use the proper nuts, bolts and...
Owner's Manual - Page 256

... satisfactorily on your vehicle may turn on the underhood emission control label), it can damage your engine. To provide cleaner air, all gasolines in the United States are not reformulated for service. ... to your authorized GM dealer for low emissions may get rid of fuels used , spark plug life may be reduced and your emission control system performance may be affected. Be sure the...
Owner's Manual - Page 311

...label is: This is the engine code. Vehicle Identification Number (VIN) Engine Identification The 8th character in the front corner of the instrument panel, on the driver's side. This code will help you ever need ... rear edge of the passenger's door. D D D D your engine, specifications and replacement parts. You can see it if you look through the windshield from the vehicle. 6-59
Owner's Manual - Page 321

Engine Oil Filter ...PF47* Engine Air Cleaner/Filter ...A1163C* Positive Crankcase Ventilation (PCV) Valve ...CV769C* Spark Plugs ...41-932* Vehicle Dimensions* Length ...189.8 inches (482.0 cm) Width... 22154396, Pin Type 14 inches (35.5 cm) Length *ACDelcoR part number Normal Maintenance Replacement Parts Replacement part numbers listed in this manual is not the same as the part used in this...
Owner's Manual - Page 327

...(166 000 km): Spark Plug Wire Inspection. Every 150,000 Miles (240 000 km): Cooling System Service (or every 60 months, whichever occurs first). Driving a vehicle with a fully warmed engine under highway conditions causes engine oil to follow the complete... this schedule if the vehicle is used off paved roads. Spark Plug Replacement. These intervals only summarize maintenance services.
Owner's Manual - Page 328

... occurs first). Long Trip/Highway Intervals Every 60,000 Miles (100 000 km): Engine Accessory Drive Belt Inspection. Spark Plug Replacement. Tire Rotation. Every 30,000 Miles (50 000 km): Fuel Filter Replacement. Every 100,000 Miles (166 000 km): Spark Plug Wire Inspection. Every 15,000 Miles (25 000 km): Automatic Transmission Service (severe conditions...
Owner's Manual - Page 349

... for leaking. (See footnote **.) 99,000 Miles (165 000 km) DATE ACTUAL MILEAGE SERVICED BY: j Inspect spark plug wires. Short Trip/City Scheduled Maintenance j Change engine oil and filter (or every 3 months, whichever occurs first). j Replace spark plugs. An Emission Control Service. An Emission Control Service. Inspect Positive Crankcase Ventilation (PCV) valve. An Emission Control...
Owner's Manual - Page 362

... occurs first). (See footnote #.) j Check rear/front axle fluid level and add fluid as needed. j Replace spark plugs. An Emission Control Service. j If you haven't used your vehicle under severe service conditions listed j j... MILEAGE SERVICED BY: j Inspect spark plug wires. Long Trip/Highway Scheduled Maintenance j Change engine oil and filter (or every 12 months, whichever occurs first).

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