Current Digital Issue
- BAD SPARK PLUG WIRES Bad spark plug wires are another common cause of misfires. ...
- WEAK FUEL INJECTOR A condition known as “lean misfire” can occur if there is not enough fuel in the combustion chamber. ...
- LEAKING FUEL INJECTOR ...
- VACUUM LEAK ...
- FLASH OVER OR CARBON TRACKING
What to check for when your ignition cable is outgassing?
What happens if a transformer is connected wrong?
How far should an arc jump?
How to connect a gas module to a ground?
What is the spark gap on a spark plug?
How long is a cable for ignition?
What is the prepurge rule for ignition?
See 2 more
What to check for when your ignition cable is outgassing?
Check visually to make sure there are no cracks or breaks in the ceramic; that the igniter cable is not dried out or cracked; and that the boot is in good condition. If there is a white, powdery substance on the cable that is the result of ignition cable “outgassing,” replace the cable.
What happens if a transformer is connected wrong?
If connected wrong, the transformer can be burned out, because one side of the transformer is grounded somewhere in the control wiring. You can check this by measuring the voltage from each transformer terminal to ground; 24 V = hot side (R); 0 V = ground side (C).
How far should an arc jump?
From the module connection to the igniter cable, an arc should jump at least a 1/2-in. gap. 3. The spark gap on most systems, from the tip of the igniter to the ground connection, is 1/8 in. If the spark will jump across ½ in. with good intensity, it should be able to jump across 1/8 in. with no trouble at all.
How to connect a gas module to a ground?
It may be necessary to establish a good connection to ground by using a wire with a clamp onto the gas line or equipment chassis and connecting it to the ground terminal of the module. All connections should be clean, unpainted, and generally offer good metal-to-metal contact. When you look at the wiring diagram for the equipment, if you see a symbol showing the use of a chassis ground (Figure 2), be careful that you have a good connection.
What is the spark gap on a spark plug?
3. The spark gap on most systems, from the tip of the igniter to the ground connection, is 1/8 in. If the spark will jump across ½ in. with good intensity, it should be able to jump across 1/8 in. with no trouble at all.
How long is a cable for ignition?
Make sure it’s not touching any metal surfaces. Make sure it’s no more than 36 in. long. Make sure the connections are clean and tight.
What is the prepurge rule for ignition?
Under the definition of “time trial for ignition,” there is a rule for replacement that says, “You can replace a module with one with a lesser time”; the “prepurge” rule says that when replacing a module, you may go to a longer time; these two rules give some flexibility when replacing controls.
How to tell if spark plug is bad?
Pull the recoil rope and check the spark at the plug. Is there spark? Is there spark at each spark plug? Is the spark blue indicating a strong spark or is it orange/yellow indicating a “weak” spark. If you have nice blue spark on one plug (if it is a twin) or two plugs (if it is a triple) and not the others, it may be as simple as having a bad/fouled out plug. Try replacing the non-sparking spark plug with a new spark plug.
How to ignite a spark plug?
First put the spark plugs in the spark plug boots and lay them on the cylinder head bolt away from the cylinder plug hole so they are grounded. If you pull the sled over and the spark plug is over the spark plug hole and it sparks it will ignite. Pull the recoil rope and check the spark at the plug.
Why is my 4-plug connector not sparking?
If after unplugging the 4-plug connector there is no spark or the spark still looks weak, this tells you that the problem is in the major ignition components like the stator, coils, cdi, spark plugs, spark plug wires, possibly a short in the wiring harness, a bad trigger coil or on EFI models your Injector Coils are bad (they measure 19-20ohms).
What to do if you have no spark?
The coils can have a couple of issues with them. The first thing you want to do is make sure the spark plug caps are on tight and are clean. They just screw on and off the spark plug wire.
How many relays does a 1996 EFI have?
11. Specificly on Battery EFI sleds check the 2 realys on the back of the ECU. A 1996 EXT EFI has 1 relay for the spark and 1 for the fuel pump.
What to do if you have blue sparks on one plug?
Try replacing the non-sparking spark plug with a new spark plug. The next step is pretty much the same whether you saw no spark or a weak spark.
What is the yellow wire on an EFI sled?
On some EFI sleds you have 3 yellow wires and one non yellow (ground) wire. The extra yellow wire is used for powering your fuel pump. The other 2 yellow wires in the 4-prong connector sends the power to the lights/hand warmers/tachometer.
What to check for when your ignition cable is outgassing?
Check visually to make sure there are no cracks or breaks in the ceramic; that the igniter cable is not dried out or cracked; and that the boot is in good condition. If there is a white, powdery substance on the cable that is the result of ignition cable “outgassing,” replace the cable.
What happens if a transformer is connected wrong?
If connected wrong, the transformer can be burned out, because one side of the transformer is grounded somewhere in the control wiring. You can check this by measuring the voltage from each transformer terminal to ground; 24 V = hot side (R); 0 V = ground side (C).
How far should an arc jump?
From the module connection to the igniter cable, an arc should jump at least a 1/2-in. gap. 3. The spark gap on most systems, from the tip of the igniter to the ground connection, is 1/8 in. If the spark will jump across ½ in. with good intensity, it should be able to jump across 1/8 in. with no trouble at all.
How to connect a gas module to a ground?
It may be necessary to establish a good connection to ground by using a wire with a clamp onto the gas line or equipment chassis and connecting it to the ground terminal of the module. All connections should be clean, unpainted, and generally offer good metal-to-metal contact. When you look at the wiring diagram for the equipment, if you see a symbol showing the use of a chassis ground (Figure 2), be careful that you have a good connection.
What is the spark gap on a spark plug?
3. The spark gap on most systems, from the tip of the igniter to the ground connection, is 1/8 in. If the spark will jump across ½ in. with good intensity, it should be able to jump across 1/8 in. with no trouble at all.
How long is a cable for ignition?
Make sure it’s not touching any metal surfaces. Make sure it’s no more than 36 in. long. Make sure the connections are clean and tight.
What is the prepurge rule for ignition?
Under the definition of “time trial for ignition,” there is a rule for replacement that says, “You can replace a module with one with a lesser time”; the “prepurge” rule says that when replacing a module, you may go to a longer time; these two rules give some flexibility when replacing controls.
