Question about 1992 Buick LeSabre
Connect a spark plug test gauge tool. It has an adjustable tip which allows you to see if there's a spark.
Posted on Apr 16, 2015
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Posted on Jan 02, 2017
Voltage is applied across the coil primary only in brief pulses too short to light the typical troubleshooting light.
The 2 seconds you are seeing it light is just before the coil is hit with pulses. After that brief span, voltage is applied and removed too quickly to detect that with a light.
If you are getting no spark, it is because this rapid application and removal of the voltage isn't happening at all. This can be caused by a failed ignition module or ECU. In your engine, there may also be a pulse transformer in the distributor that supplies signal to the coil instead of the pulse coming from the ECU. Pulse coils will normally measure from 6,000-12,000 ohms if they are still OK.
Posted on Jan 12, 2009
Check out the induction coil fuse plus wiring if it has got damaged while replacing the plugs, coil, etc, since current is not reaching the plugs to initiate the firing .. sodeep
Posted on Aug 20, 2009
SOURCE: Random Misfire of cylinders
Look for a vacuum leak.
Look at your scanner for fuel trims, if it adding that is a sure dign of a vacuum leak.
When all else fails you will need a REAL scanner with MODE 6 if what you have does not have the misfire counters as part of the normal PIDs.
$50 code scanners will not do what you need, it may be time to find a shop with a real tech, look for a shop that has a tech with an ASE L1 certification.
The only other alltenative you have is drive it until you can get a miss on a particular cylinder. (but that may not happen)
If it was in front of me I would be scanning cylinder misfire counters under MODE 6.
Posted on May 16, 2010
I have a 92 F-150 XLT with a 5.0. The ignition switch block burned up so I replaced it. Now it will not get spark when I crank it over, but when I crank it and let off of the key, I get one spark jump from the coil; to the distributer. (I have a spark tester I placed on the cap to the wire) I have replaced the coil and the ignition module that is on the fender attached to the brain, I have replaced the ignition cylinder and key (It was acting up) and I took the dash apart to see the wire harness to ensure there was no burnt wires. (The wire connection to the ignition block is not damaged from when the switch burned.
Does anyone know if there is a part that tends to go bad when the ignition block burns up??
Help, Thanks, Todd
Posted on Jan 26, 2011
Swap coils over ie: put 2 / 3 coil where 1 / 4 coil go and viser versa. If your no spark moves from 2 & 3 to 1 & 4 you have a faulty coil which is what I think yur problem will be.
Posted on Jun 29, 2012
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