Is there a way to test an HEI module?
- 1. Test for power at the pink BAT terminal. You should have battery voltage w/ the key in the start and RUN positions.
- 2. Connect the ground side of your test lamp to the battery POSITIVE cable. ...
- 3. Remove the cap & rotor. ...
- 4. DVOM (meter) still connected to green & white leads. ...
Full Answer
Is there a way to test a Hei module?
for the HEI gurus, does this look like a good way to diagnose HEI issues? "The easiest way to test a module on the car is to ensure that the wiring & pickup coil are OK. The module is essentially an amplifier with a built in analog to digital convertor. Easy tests for HEI system:
How do you test an electronic ignition module?
The first thing you do in this step is:
- locating the positive (+) ignition module wire.
- You need to turn your car’s key to run position but do not start the engine.
- Pierce your car’s positive ignition module wire with the red lead of the multimeter. The wire should have a battery voltage reading. ...
How to test an ignition control module?
Step-by-Step Guide
- Identify Where The Ignition Control Module Is. The ignition control model is based on the distributor housing. ...
- Test for Spark. Pull out one plug from the spark plug. ...
- Test the Coils for Voltage. Coils come with negative and positive terminals. ...
- Find the Positive Ignition Modules Wire. ...
- Locate the Negative Ignition Module Wire. ...
How to wire a Hei Distributer?
The easiest way to do it (and the way I did mine) is to find a connection on the back side of the ignition switch that has 12V when the key is in the "start" AND in the "run" position. Make up a 12 gauge wire with an in-line 20 amp fuse. Connect that wire from the ignition switch directly to the BAT position on the HEI.
How do you test an ignition module?
0:1210:20How to test an ignition coil/module with a test light (distributor ignition)YouTubeStart of suggested clipEnd of suggested clipTest light with an air gap going to ground go ahead and crank it. Please. As you can see there is noMoreTest light with an air gap going to ground go ahead and crank it. Please. As you can see there is no spark. The next step is to check coil positive and coil negative while we're cranking.
How do I test my HEI distributor?
Use a volt meter to test the hot wire while a buddy cranks the engine over. If the voltage drops below 10.5, check your battery. If the battery is fine, make sure the wire feeding the distributor is sufficient.
How do you test an HEI ignition coil?
1:132:15Simple GM HEI coil test, short version - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd we are. About. About half an home. So that's good the primary is good now in the secondary. We'MoreAnd we are. About. About half an home. So that's good the primary is good now in the secondary. We're going to go from this this ringlet.
How do I know if my HEI ignition module is bad?
a faulty ignition module can affect ignition timing, resulting in an engine that misfires and runs rough. the engine may also run well at low speed, but won't accelerate well. 3. stalling: a failing ignition module can occasionally prevent the engine from getting spark, causing it to stall.
How many volts should a HEI distributor have?
In order to run properly, an HEI requires a full 12 volts at all times. The 20-gauge resistance wire must be replaced by a 12-gauge wire (pink to maintain the factory colour coding), hooked up to the HEI cap's "BAT" terminal.
How many volts does a stock HEI distributor put out?
This larger cap also offered space to position the coil, making the HEI distributor self-contained. All you have to do to run this system is to apply a straight 12 volts to the distributor and you're ready to run.
How many volts is a stock GM HEI coil?
Description. Top Street Performance HEI ignition coil provides 65,000V to your spark plugs.
How does an HEI ignition module work?
The HEI distributor is an inductive-discharge-style ignition, but with the points replaced by a solid-state switching device called an electronic ignition-control module. The module works like an electrical switch, turning power on and off to the ignition coil. This, in turn, causes the coil to generate spark.
How many amps does an HEI ignition draw?
Actually, an HEI draws only 2- to 3-amps, compared to the approximate 6-amps an external oil-filled coil draws. The lower amperage draw results in a much cooler running HEI coil. HEI Coils also run cooler because they are encapsulated in thermal epoxy, which dissipates heat more efficiently than oil-filled coils.
What causes ignition module failure?
The number one reason that ignition modules go bad is because of heat. On most of the cars that have a recurring problem with this, they have the original distributor in the car. As the distributor ages and wears, the bushing in the shaft goes goes bad and starts to cause excessive heat.
What causes ignition module to burn out?
The leading cause of premature failure of an ignition coil is due to a worn or bad spark plug ignition cable. A bad spark plug ignition cable will have a much higher than normal resistance. This high resistance causes a very high amount of voltage to be generated from your ignition coil's secondary winding.
How long do ignition modules last?
Average lifetime of ignition coil is around 100,000 miles or more. It is not an easy worn out replacement car part but still could fail for variety of reasons.
How do you test a vacuum advance on a HEI distributor?
2:5711:54HEI Distributor Vacuum Advance diagnose and replace - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou know if it does hold pressure then you know it's good. This one too is also I'll show you it'sMoreYou know if it does hold pressure then you know it's good. This one too is also I'll show you it's also an adjustable unit. So you can actually change the amount of vacuum. That it offers.
How do you know if your ready to run a distributor?
To check the Ready-to-Run Distributor, confirm that there are 12 volts on the Red wire when the key is On and while cranking. It is important to confirm 12-volts during cranking as many older vehicles may have resistor wiring or ballast resistors inline which could affect the voltage needed to fire the ignition.
How do you bench test a distributor?
0:171:11Bench Test Ford Front-mount Distributor - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd just run the distributor. Across the lobe and you'll see as it points open and close you'll getMoreAnd just run the distributor. Across the lobe and you'll see as it points open and close you'll get a good spark jumps. About our quarter inch gap. That's what you want to see.
How do you test a distributor and coil?
3:275:53How to Test Ignition Coils - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you go all the way to 40 to 50,000. I should jump all the way across and should be nice and blueMoreSo you go all the way to 40 to 50,000. I should jump all the way across and should be nice and blue if it's yellow or if it doesn't want to jump all the way across. You have a weak coil.
How to test a car module?
The easiest way to test a module on the car is to ensure that the wiring & pickup coil are OK. The module is essentially an amplifier with a built in analog to digital convertor.
What is HEI in cars?
An HEI is pretty self-contained. If it's got power and the car cranks, proving both battery power and ground, and it still has no spark, it's either the coil, pickup or module. Coils usually fail slowly, giving warning when hot.
How to tell if a pickup coil is good?
Set your DVOM to AC VOLTS. Have a helper crank the engine as you watch the AC VOLTS reading. A good pickup coil will produce about 3V AC when cranking. Less than approx. 2V AC indicates a bad pickup coil.
How to tell if a coil is working?
after you confirm power to the coil remove a plug, ground the plug crank it and watch for spark. crude but will tell you if it's working.
What can you use to build a test stand?
You can build a test stand with signal generator, 'scope and 12 volt source.
Do parts stores test bad parts?
Some parts stores have equipment to test them but they usually test bad. They sell more parts that way.
How to locate ignition module?
Step 1 - Locate Ignition Module. To locate the ignition module, refer to a wiring diagram for your vehicle’s particular make and model. As you might guess, the placement can change based on the type of vehicle, so it is important to have the correct diagram or you will be practically going in blind. You'll want to identify the terminals running in ...
What is the purpose of the ignition module?
Test light. The ignition module is responsible for creating the spark that starts your engine, so when your car won't start, testing this part is a good place to begin. You will want to determine whether the ignition module is producing electricity and that the electricity is getting to the spark plugs to get your engine going.
How to check if spark plugs are working?
Test this by attaching a 12V test light to your spark plug terminals. If the light flickers when the ignition is cranked, you will need to check other components for a solution to your starting problem. If the light does not come on, inspect the wiring to the spark plugs for tell-tale signs like burn marks, fraying, and breaks.
Can you replace an ignition module yourself?
Make sure to check all wiring going to and from the ignition module and spark plugs since wires are much easier and cheaper to replace than engine parts. If your ignition module does need replacement, you can choose to do it yourself if you're confident in your level of experience.
