Question about 1990 Chevrolet Suburban

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Ignition coil there is a white wire hanging from the coil ,where does that go? 1990 suburban

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Hi. The white wire hanging. on cheevrolet.on the seem connector in the ignition coil. is for a thacometer. signal.
When you want to put a aftermaket thacometer,
or for a Tester to check idle based on RPM.
I hope this help OK>

Posted on Jul 06, 2008

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How to replace ignition coil?


There are TWO types of ignition coils a external that is bolted to the intake manifold in front of distributor. Internal this one is mounted on top of distributor cap. Remove holder ring for spark plug wires then remove protective cover 2 screws 7mm then remove the four screws that hold coil in place. there are three wires 1 red and 1 white these have a double spade connector on them remove with needle nose pliers the third has eyelet that screws down with one of the hold down screws. REMEMBER TO MARK THE POSITION OF THE SPARK PLUG WIRES THEY ONLY WORK IN THE RIGHT FIRING ORDER 18436572 clockwise rotation.

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1990 Dodge Ramcharger won't start. Battery output 12v, voltage across coil terminals 6v, voltage output at coil port to coil wire 6v, voltage of coil wire output to distributor 6v. Engine will c


There should be a small white ceramic block on the firewall - this component cuts the battery voltage from 12 to 9 volts for the coil and ignition system. It has 4 wires and is called a ballast resistor.
You may need a book with the wiring diagram to be able to test it. You should have battery voltage going in and something like 9 volts coming out.
You can also run a wire with a fuse from the battery to the positive side of the coil to check the system. Disconnect the factory wire from the coil first.

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Electronic engine control module-ecm no.1 yellow wire to eec power relay.white/light blue wire to red/light green wire at ignition switch and fusible link, from fusible link white/light blue wire to ignition coil and eec distributer module. the no. 1 yellow wire at the eec power relay should have voltage on it at all times, it also has a fusible link. good luck!

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That wire is suppose to be disconnected. It is a tach connection. Will it start if you spray carb cleaner in to the throttle body?

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I have a 1991 honda accord I started it like I always do to let it warm up. It started right up like it always does. I went inside to let it warm up. I came outside and it wasn't runnung. I tried to start...


Please see my tip at http://www.fixya.com/cars/r6223989-ignition_coil_doesn_t_spark . These are generic instructions--specific instructions are pasted below from Autozone.com. If you get stuck, please get back to me.

Use a test light to check for power to the coil on the black wire with a yellow stripe--see procedure below and other tests you can run. You will need a volt-ohm meter to run most of these tests.

The system used on 1990-95 Accords and 1989-95 fuel injected Preludes uses the distributor components to signal the engine computer. The ECU triggers the spark through the igniter unit and coil. This spark timing is controlled by the computer as an integrated function of the fuel management system. The distributor contains a crankshaft angle sensor and a No. 1 Cylinder Top Dead Center (TDC) sensor. Using these and other electrical inputs, the computer controls spark timing electrically.

1990-91 ACCORD
See Figure 6

  1. Remove the distributor cap, rotor and shield.
  2. Label and disconnect the 4 wires from the igniter unit.
  3. Switch the ignition ON . Use a voltmeter to check for voltage between the black/yellow wire and ground. Battery voltage should be present. If the voltage is not present, check the black/yellow wire between the igniter and the ignition switch.
  4. Check for voltage between the white/blue wire and ground. Battery voltage should be present with the ignition ON . If voltage is not present, check the white/blue wire from the igniter to the coil and test the ignition coil.
  5. Turn the ignition OFF . Check for continuity in the yellow/green wire between the igniter and the ECU.

jturcotte_639.gif


Fig. Fig. 6: Terminal identification on 1990-91 Accords

  1. Check the blue wire for continuity between the tachometer and the igniter.
  2. Check the resistance between the terminals which connect to the blue and white/yellow wires. It should be between 1,100-3,300 ohms. If not, the igniter must be replaced.
Coil test:
1990-91 ACCORD

See Figure 16
  1. The ignition coil is contained within the distributor. With the ignition OFF , remove the distributor cap.
  2. Remove the screws securing the black/yellow wire and white/blue wires from the terminals. The black/yellow wire is connected to the primary positive terminal and the white/blue wire is connected to the primary negative terminal.
  3. Measure resistance between the terminals. Resistance should be between 0.6-0.8 ohms.
  4. Measure the resistance between the primary positive terminal and the secondary terminal. Resistance should be 12,800-19,200 ohms.
jturcotte_640.gif

Fig. Fig. 16: Coil terminal designation on 1990-91 Accords

  1. All test conditions must be met. If any test condition is not satisfied, the coil must be replaced.

jturcotte_641.gif

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Ignition coil


The tach wire tells the computer information it needs to have engine control.Please rate if this was helpful,thank you.

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