Showing posts with label geo. Show all posts
Showing posts with label geo. Show all posts

Thursday, May 8, 2014

How to Test the Ignition Coil on a 12 Volt Geo Metro

The Geo Metro, like most other passenger cars, uses a 12-volt power system to supply the cars electrical needs. Unfortunately, the cars spark plugs require much higher voltage to create the spark that ignites the fuel-air mixture. The ignition coil provides this increased voltage by converting the 12 volts supplied by the electrical system into a charge of up to 30,000 volts. Quite often, when a car uses to run or runs badly, the fault lies with the ignition coil.

Instructions

    1

    Locate the ignition coil, connected to the cars firewall. It is a cylindrical object with a thick wire connected to it.

    2

    Remove the plastic cap that protects the coil.

    3

    Use a voltmeter to test the coils positive terminal. Set the voltmeter to 12-volt direct current (DC), and touch the positive probe to the positive terminal on the coil. The terminals are bolts on one end of the coil, and the positive terminal will be marked with "+." The voltmeter should read 12 volts. If not, proceed to Step 4.

    4

    Check to ensure that the ignition coil electrical connector is firmly in place. Check the under-hood fuse panel to ensure the coil fuse/relay has not gone bad. Blown fuses of this type appear burned. Recheck the coil with the voltmeter. If it still detects no power, the problem lies at a location other than the coil.

    5

    Disconnect the negative battery terminal to cut off power to the coil.

    6

    Disconnect the high-tension cable from the coil. This is the thick wire that attaches to the center of the coil using a connector similar to a spark plug boot. Grasp the boot, and pull it straight off the coil as you twist it.

    7

    Use a 1/4-inch drive socket or a small box end wrench to disconnect the negative and positive terminal wires from the coil.

    8

    Remove the coil from the firewall by removing the two bolts that attach the mounting bracket.

    9

    Set the voltmeter to test resistance (ohms), and touch the probes to the positive and negative terminals. The voltmeter should read between 1.35 and 1.65 ohms for standard-emission models, and between 1.08 and 1.32 ohms for cars with upgraded (California) emissions. If the reading falls outside this range, replace the coil.

    10

    Check the resistance between the positive terminal and the high-tension terminal just as you did in Step 9. This resistance should lie between 22.1 and 22.9 kilohms for all models. If the reading falls outside this range, replace the coil.

Continue reading..

Friday, April 18, 2014

How to Change the Fuel Pump in a 1996 Geo Metro

The 1996 Geo Metro has a four-cylinder 1.3 liter engine that uses fuel injection to deliver fuel to the engine at high pressure. The fuel pump is in the fuel tank, which means you must disconnect the fuel tank before you can replace the fuel pump. Experienced home mechanics should be able to do the job in several steps.

Instructions

    1

    Loosen the fuel tank cap to relieve the pressure in the fuel tank. Disconnect the fuse for the fuel pump relay in the engine compartment. Run the engine until it stalls, then engage the engine to ensure you have completely relieved the pressure in the fuel system.

    2

    Disconnect the negative battery cable with a socket wrench to prevent accidental sparking from the battery.

    3

    Siphon the fuel through the filler tube of the fuel tank into a container approved for gasoline. Detach the electrical connector for the fuel pump and fuel sending unit.

    4

    Raise the vehicle with a floor jack and support it on jack stands. Release the clamps on the filler neck and disconnect the filler neck from the fuel tank. Disconnect the clamp from the inlet hose on the fuel filter and detach the inlet hose from the fuel filter.

    5

    Disconnect the clamps for the fuel lines to the fuel tank and detach the fuel lines from the fuel tank. Support the fuel tank with a transaxle jack, and remove the mounting bolts for the fuel tank with a socket wrench. Disconnect the fuel tank and lower it from the vehicle with the transaxle jack.

    6

    Release the clamps for the fuel lines on the fuel pump assembly and detach the fuel lines from the fuel pump assembly. Disconnect the attaching screws for the fuel pump assembly with a socket wrench and remove the fuel pump assembly from the fuel tank.

    7

    Remove the mounting screws for the fuel pump. then detach the electrical connector for the fuel pump. Disconnect the fuel pump from the rest of the fuel pump assembly.

    8

    Perform steps 2 through 4 in reverse to complete the fuel pump installation. Fill the fuel tank and connect the negative battery terminal with a socket wrench. Turn the ignition switch to the ON position. Start the engine and check for fuel leaks.

Continue reading..

Wednesday, November 27, 2013

1993 Geo Metro Timing Belt Installation

The Suzuki Cultus is a supermini manufactured by Suzuki since 1983. It is marketed under a variety of names, including the Geo Metro in the United States. The 1993 model belongs to the second-generation of this vehicle, and the United States version features a three-cylinder 1.0-liter engine with a single overhead camshaft. This engine design uses a timing belt to keep the camshaft synchronized with the crankshaft. You will need to replace the timing belt in a 1993 Geo Metro at 60,000 mile intervals.

Instructions

    1

    Remove the cable from the negative battery terminal with a socket wrench to ensure the engine doesnt start. Raise the vehicle with a jack and support it on jack stands. Disconnect the bolts for the crankshaft pulley and remove the crankshaft pulley.

    2

    Disconnect the cover for the timing belt with a socket wrench. Turn the crankshaft clockwise to align the timing marks on the camshaft and crankshaft gears. Disconnect the plate, spring and spring damper for the timing belt tensioner. Remove the timing belt tensioner and the timing belt.

    3

    Place the bolt for the timing belt tensioner plate into the hole on the timing belt tensioner. Install the timing belt tensioner, and connect the spring and spring damper. Tighten the bolt on the timing belt tensioner by hand.

    4

    Turn the crankshaft clockwise if necessary to realign the timing marks on the crankshaft and camshaft gears. Install the new timing belt onto the crankshaft and camshaft gears so that the arrow on the timing belt points in the clockwise direction.

    5

    Turn the crankshaft clockwise by two complete turns to remove the slack on the timing belt. Ensure that you align the timing marks on the crankshaft and camshaft gears. Tighten the stud on the timing belt tensioner to 8 foot-pounds with a torque wrench. Tighten the bolt on the timing belt tensioner to 20 foot-pounds.

    6

    Replace the timing belt cover and tighten its bolts to 8 foot-pounds with a torque wrench. Place the key way of the crankshaft pulley into the key on the timing belt pulley and install the crankshaft pulley. Tighten the bolts on the crankshaft pulley to 8 foot-pounds. Lower the vehicle and connect the cable for the negative battery terminal with a socket wrench.

Continue reading..