Will a lower resistance distributor pickup coil damage the igniter to which the pickup coil sends a voltage signal?
Detail:
My 1992 Toyota Pickup's distributor pickup coil broke . The function of the pickup coil is to send a signal to the igniter (a.k.a. "ignition control module"), which then processes the signal to make the main coil fire the spark plugs at the correct time. I believe the signal from the pickup coil is about 1.5 volts. Today I replaced the shredded pickup coil with a pickup coil from a 1988 Toyota Pickup. The ohms ratings are different for the two pickup coils.The 1992 truck starts fine. The check engine light went away and the codes stayed clear. I drove the truck for half an hour, and all seems fine.
The factory service manual specifies that:
-- the 1988 pickup coil have a resistance of 140 to 180 ohms (neither hot nor cold conditions specified). At cold, it measures about 165 ohms.
-- the 1992 pickup coil have a resistance of 185 to 275 ohms when cold, and 240 to 325 ohms when hot. At cold, it measures about 200 ohms.
If out of spec, the manual says to replace the housing.
Below are photos of the pickup coil, igniter and schematics. More detail about how the igniter works appears at:
http://web.archive.org/web/20080827....com:80/hondafaq/igniter-operation/index.html
I am wondering if the lower resistance of the coil leads to higher amps, resulting in more power dissipation inside the igniter, perhaps overheating it or at least shortening the igniter's life?
Will the 1988 pickup coil damage the 1992 truck's igniter?
Detail:
My 1992 Toyota Pickup's distributor pickup coil broke . The function of the pickup coil is to send a signal to the igniter (a.k.a. "ignition control module"), which then processes the signal to make the main coil fire the spark plugs at the correct time. I believe the signal from the pickup coil is about 1.5 volts. Today I replaced the shredded pickup coil with a pickup coil from a 1988 Toyota Pickup. The ohms ratings are different for the two pickup coils.The 1992 truck starts fine. The check engine light went away and the codes stayed clear. I drove the truck for half an hour, and all seems fine.
The factory service manual specifies that:
-- the 1988 pickup coil have a resistance of 140 to 180 ohms (neither hot nor cold conditions specified). At cold, it measures about 165 ohms.
-- the 1992 pickup coil have a resistance of 185 to 275 ohms when cold, and 240 to 325 ohms when hot. At cold, it measures about 200 ohms.
If out of spec, the manual says to replace the housing.
Below are photos of the pickup coil, igniter and schematics. More detail about how the igniter works appears at:
http://web.archive.org/web/20080827....com:80/hondafaq/igniter-operation/index.html
I am wondering if the lower resistance of the coil leads to higher amps, resulting in more power dissipation inside the igniter, perhaps overheating it or at least shortening the igniter's life?
Will the 1988 pickup coil damage the 1992 truck's igniter?
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