DIY: BMW Fuel Injector Testing

Solenoid and Valve Operation
1. Start the BMW's engine.
2. Hold the pad of a stethoscope against the top of the fuel injector. Listen through the stethoscope to the fuel injector. During normal operation, the fuel injector will make a clicking sound as the solenoid engages the valve.
3. Replace the fuel injector if the clicking sound is not present on any single injector.
Fuel Pressure Regulation Testing
4. Disconnect the vacuum line connected to the fuel pressure regulator.
5. Shine a light into the vacuum line connection hole. If fuel is present in the vacuum line the fuel pressure diaphragm is ruptured. Ruptured diaphragms may also result in gasoline fumes being drawn into the cabin of the vehicle.
6. Replace the regulator if the diaphragm has been ruptured.
7. Reconnect the vacuum line to the fuel pressure regulator.
Injector Resistance
8. Disconnect all fuel injector electrical plugs.
9. Set a multimeter to measure 'Ohms.' Touch both leads to the fuel injector's electrical plug terminal---one lead on each side. It does not matter which lead is connected to which side.
10. Read the multimeter output. Note the measure of resistance in Ohms. Repeat this process on all the fuel injectors.
11. Compare the resistance readings. All readings should be roughly equivalent. Fuel injector failure has occurred if one injector has a significantly higher or lower resistance than other injectors.
12. Replace injectors that fail the resistance test.
Voltage Feed Testing
13. Rotate the ignition key to the 'On' position. It is not necessary to start the BMW's engine to test the voltage being transferred to the fuel injector's electronics plug.
14. Pull the electronics plug from a fuel injector terminal.
15. Set the multimeter to measure 'Volts.' Insert both the red and black leads into the electronics plug leading removed from the fuel injector. Either lead may be inserted into either side of the plug.
16. Measure the incoming voltage. The incoming voltage should be approximately 12 volts.
17. Replace any injector if the lead is providing 12 volts but the injector is failing.
Electrical Short Testing
18. Disconnect all electrical leads from the fuel injectors.
19. Set a multimeter to 'Volts.' Connect the multimeter's red lead to any fuel injector plug lead. Connect the multimeter's black lead to the positive terminal of the BMW's battery.
20. Engage the starter of the motor. The engine will not start, but electricity will flow to the fuel injector leads. Monitor the voltage being measured in the multimeter. The voltage should alternate between 0 volts and approximately 12 volts. You may need a friend to assist you with the engine ignition while you monitor the voltage. Leave the multimeter leads connected for the next step.
21. Connect a fuel injector lead to the fuel injector. Engage the starter while monitoring the voltage on the multimeter. The voltage should continue to alternate. Repeat this step until only the original lead remains untested. If the voltage fails to alternate when a fuel injector is connected, the fuel injector has electrically shorted and must be replaced.
22. Test the final fuel injector lead. Disconnect any other tested fuel injector. Connect the originally used lead to the respective fuel injector. Retest for alternating voltage with the original lead connected.

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How to Transfer Music From a USB Device to a BMW Radio

1. Insert the USB drive into the USB port on the center console, or in the glove box.
2. Press the 'Menu' button and select 'CD/ Multimedia.' Select the USB icon saying 'Not Connected.'
3. Move the iDrive knob to the right. Scroll down and select 'Music Data Import/Export.'
4. Click on the 'Import New Music (USB)' option. A percentage bar and sign saying 'Importing Music' will appear. If a sign saying 'No USB Attached' appears, then remove the USB, turn off the iDrive system, turn off the car and get out. Lock the car, and wait about 4 minutes to try again.
5. Rename the music you imported. Select 'USB1' and click on the 'Option' button. Click on 'Rename Album.' Delete 'USB1' using the back key. Enter the name of the new album using the iDrive knob. Click 'OK.'

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How to Install Ml 320 Power Steering Fluid

1. Lift the hood of the MI 320 so you can reach the steering fluid reservoir.
2. Unscrew and remove the power steering fluid cap.
3. Measure the fluid levels (See Introduction).
4. Add power steering fluid if necessary. Continue to measure fluid levels until your car has enough steering fluid.
5. Close the hood of the car.

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How to Adjust the Sunroof on a Bonneville

1. Turn the Bonneville on. Insert the key into the ignition and turn to the 'On' position.
2. Press and hold the 'Sunroof' switch back to the first position. The sunroof switch is located in the overhead headliner between the sun visors. The first position opens the sunshade and glass panel.
3. Press and release the switch back to the second position to open the sunroof to the comfort stop position. This position opens the glass to a position that is designed to reduce noise and allow air into the car that is comfortable for passengers.
4. Press the sunroof in any direction when opening and the sunroof immediately stops at that position.
5. Press and hold the sunroof switch for more than one and half seconds and the sunroof opens all the way.
6. Press and hold the sunroof switch forward to close the sunroof.
7. Push the sunroof switch upward to open the sunroof glass to the vent position. The sunroof must first be all the way closed. The vent position opens the sunroof by tilting it.

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How to Replace Front Brake Pads on a Mercedes C230

1. Park the C230 on a flat surface and apply the parking brake.
2. Place tire blocks behind the rear wheels.
3. Loosen the lug nuts on the Mercedes' front wheels with the lug wrench.
4. Place the jack beneath the frame in the front of the vehicle and lift the front tires off the ground. Place two jack stands under the vehicle, one under each axle.
5. Remove the lug nuts and take the front wheels off.
6. Pull the spring clip from the outside of the caliper with a pair of pliers.
7. Remove the dust covers from the caliper slide bolts with a flat screwdriver. Remove both slide bolts on each caliper with a 14 mm socket wrench.
8. Lift the caliper from the caliper bridge and suspend it from the upper steering arm with a bungee cord or wire coat hanger--do not allow the caliper to hang by the brake line.
9. Open the brake bleed valve on the caliper with a 10 mm wrench. Place a drip pan below the caliper to capture the brake fluid that will flow from the bleed valve during the caliper piston depression.
10. Place the C-clamp over the piston and the back of the caliper. Squeeze the piston to force it into the side of the brake caliper. This will allow the caliper to fit over the new brake pads, which will be thicker than the outgoing, worn pads.
11. Remove the C-clamp from the caliper once the pistons have been completely depressed within the side of the caliper. Close the brake bleed valve with the 10 mm wrench. Dispose of the expelled brake fluid properly (see epa.gov for your state's regulations on disposal of hazardous materials).
12. Remove the two brake pads from the slots of the caliper bracket.
13. Apply brake grease to the back side of each of the brake pads and slide them into the caliper bracket slots on either side of the Mercedes' rotor.
14. Replace the caliper over the new brake pads in the caliper bracket slots and screw in the caliper bolts with the 14 mm socket wrench. Insert the spring clip back into the caliper.
15. Repeat the process (steps 6 through 14) for the other front brake pads.
16. Replace the front wheels onto the C230's wheel bolts and screw on the lug nuts.
17. Lift the front of the Mercedes and remove the jack stands. Lower the front tires to the ground and tighten the lug nuts with the lug wrench.

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How to Remove E36 Struts

Raise the BMW
1. Loosen the lug nuts on both of the front wheels, but do not remove them.
2. Raise the front of the car. Positioning the floor jack underneath a front jack point and raising the car. Place a jack stand underneath the jack point (as near it as possible on the frame rail) to support the weight of the car. Lower the BMW onto the jack stand and remove the floor jack to repeat the procedure on the other side. The jack points are located directly behind each front wheel and are indicated by small indents in the metal subframe of your car.
3. Raise the rear corners of the car and support each corner on a jack stand, using the same procedure as you did for the front. The rear jack points are located in front of the rear wheels and are indicated by an indent in the subframe.
4. Remove the lug nuts that are on the front wheels, then remove the front wheels.
Remove the Struts
5. Remove the front sway bar links using your 16mm open wrench and 16mm socket wrench, using one to hold the nut as you loosen the bolt that is threaded into it. These are located on the bottom of each front strut.
6. Unplug the brake pad wear sensors that are connected to the disc brake assemblies on both front corners.
7. Loosen and remove the 18mm nut that is threaded onto the large upper bolt connecting the wheel hub and strut toward the bottom of the strut assembly. Leave the bolt in place on both sides for now.
8. Using your air impact wrench, loosen and remove the second, lower set of 18mm bolts connecting the wheel hub and strut assemblies on both sides. These bolts are secured with a thread-locking solution from the factory, so an air impact wrench is required to remove them.
9. Position your floor jack underneath each front brake rotor as you remove the bolt whose nuts you removed in Step 3. The strut assembly will separate from the wheel hub and drop down, so the floor jack is needed to support it and prevent it from slamming against the ground.
10. Open your hood and, using a utility knife, remove the plastic covers that sit at the top of each strut tower on both sides of the engine bay.
11. Grasp the strut assembly with one hand while you remove the three 13mm nuts at the top of each strut tower. Once the nuts are removed, you can pull the strut assembly directly down on each side to remove it.

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How to Change a CV Joint on an Audi

1. Remove the center caps that are installed at the center of both of your front wheels, then loosen and remove the bolt that sits in the center of each wheel using your 17-mm Allen wrench.
2. Loosen the lug nuts on both front wheels, but do not remove them.
3. Raise each front corner of the car using your floor jack, and support it using your two jack stands, then remove the lug nuts on both wheels, and take them off.
4. Remove the two bolts, size 17 mm, that sit on the back side of each brake caliper assembly, and remove the caliper and rotor on both sides.
5. Remove the tie rod end bolt near the top of where the brake assembly was, using your 16-mm wrench and 13-mm socket on both sides.
6. Remove the bolt at the top of your upper control arms on both sides using your 16-mm open wrench and socket. After you loosen the nut, you may need to hit the bolt with your rubber mallet to tap it out of the control arm ends.
7. Remove the six bolts that sit around the circumference of the axle at the end of the CV Boot using the 8-mm triple square hex bit. Maneuver the axle out of the car by pulling it straight down and pulling it out of the wheel hub.
8. Place the axle in the large vice, and remove the CV joint by twisting it off with your hand. Remove the old rubber CV boot. Replace the old CV joint with the new one by sliding it into place, and thoroughly pack it with grease.
9. Slide the new CV boot over the axle so it covers the joint, and tighten the clamp around the boot to secure it on to the joint.
10. Insert the axle into the wheel hub on both sides, then align it to your driveshaft and secure it with the six triple-square hex bolts.
11. Reconnect the upper control arm assemblies on both sides by tapping the large bolt into its place and securing it using the 16-mm socket and 16-mm open wrench.
12. Reconnect the tie rod ends on both sides using the 16-mm open wrench and 13-mm socket.
13. Reinstall the brake assemblies with your 17-mm socket and the four 17-mm bolts.
14. Mount the front wheels and screw in the lug nuts, but do not tighten them all the way on.
15. Lower your car, and reinstall the bolts that go into the center of both front wheels. Tighten your lug nuts, and reinstall your wheel's center caps to complete the installation.

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How to Change a Taillight on a 2001 BMW E46 330i

1. Open the 2001 BMW 330i's trunk and locate the rear of the bulb holder on the right or left rear of the vehicle in the fender area.
2. Press the bulb holder clasp to release the bulb holder and remove it from its cradle.
3. Unplug the power supply to the bulb holder.
4. Turn the taillight bulb to the left with light pressure to release it from the bulb holder and remove the bulb.
5. Place a new taillight bulb in the bulb holder and turn it to the right with light pressure until the bulb clicks into place. Be sure to wear a glove or use a paper towel to handle the new bulb.
6. Plug the power supply back into the bulb holder.
7. Place the bulb holder back into its cradle, applying gentle pressure to the bulb holder and the bulb holder clasp until you hear the bulb holder engage.

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How to Replace a 1996 Mercedes E320#039;s Wiper Blades

1. Fold the wiper arm away from the windshield. It will lock with the wiper pointing away from the glass.
2. Move the wiper blade so it is at a right angle to the wiper arm.
3. Check the arrow on the wiper arm and remove the blade from the retainer in that direction.
4. Place the replacement blade in the retainer and slide it into the slot in the opposite direction of the arrow.
5. Position the blade so it is parallel to the wiper arm and fold it back to its normal resting place on the windshield. Repeat process for the other wiper blade.

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How Do I Open the Gas Lid on My BMW Convertible?

1. Unlock all the BMW's doors.
2. Press the right edge (the rear or trailing edge) of the fuel filler flap to open it.
3. Turn the fuel cap counterclockwise to remove it, then place it in its holder on the inside of the fuel filler flap.

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