Bosch ignition coil

[b52stealthf18]

I'm back with a question again. Bmili ako ng Bosch Ignition coil with internal resistor na daw un so hindi na kailangan ng external daw. Narinig ko sa ibang mekaniko na kahit na internal na ung resistor, much better daw pag may external.
So pinalagyan ko ng external resistor, ang problem, hard starting.
Ginawa nung ngkabit e, tinanggal niya ung external resistor. one click start agad.

Question: Ok lang lang ba na di na lagyan ng external resistor ung my built-in?
How long will my new ignition lasts?

[speed unlimited]

Hindi na kailangan ng external resistor kung may built in na . May nabibili na ignition coil na nasa labas external resistor. Matagal masira ignition coil . Iyong sa 4k engine ko 6 years na ayos pa rin.

[b52stealthf18]

Hindi na kailangan ng external resistor kung may built in na . May nabibili na ignition coil na nasa labas external resistor. Matagal masira ignition coil . Iyong sa 4k engine ko 6 years na ayos pa rin.

Ok. Thanks. By the way ung pinagpalitan ko na coil wala pa one year, ng hard starting na ako. Kaya ko pinalitan ng bago. Ano ba mga posibleng dahilan at nasisira agad ang coil?

[jick.cejoco]

Ok. Thanks. By the way ung pinagpalitan ko na coil wala pa one year, ng hard starting na ako. Kaya ko pinalitan ng bago. Ano ba mga posibleng dahilan at nasisira agad ang coil?

stealth,
if your car has electronic ignition, you do not need that resistor. the reason why ignition coils of yesteryears needed the resistor is to prolong the lifespan of the points or breaker points by reducing the current between its contacts. with this system, the ignition coil receives full battery voltage during start up for of course quicker starts, then when the engine has started and you released the ignition switch from start to run or on, the ignition coil receives a lower voltage because it is in series circuit with the resistor. if the coil has a resistor built inside, the available voltage at the output will be lower, hence the hard starting
jick

[paulgozon]

There are two kinds of bosch ignition coil here in the philippines, 1) with built-resistor 2-Terminal (lower price), 2) with external resistor 2-Terminal (higher price). Another brand that has built-in resistor is the Denso Coil, which has a built-in resistor but with 3-Terminal Coil. The one you bought is a lower price bosch coil which was made to make the coil much lower in cost, with a compromise between a high performance and good starting ability. The coils delivers lower output voltage to the plugs when starting as well as when the engine is running compared to the external-resistor type. So when you have a slight problem with your ignition system (i.e. hi-tension wires, spark plug) you may experience hard starting. These lower price bosch coils are commonly used in cars/jeep which don't have a three-wire connection coming for the ignition switch.

[bongski214]

sir can the 2 terminal bosch coil be used if the existing coil is a 3 terminal one?
i'd like to try bosch kaya lang puro 2 terminal nakikita ko or is there a 3 terminal bosch coil too?

[paulgozon]

sir can the 2 terminal bosch coil be used if the existing coil is a 3 terminal one?
i'd like to try bosch kaya lang puro 2 terminal nakikita ko or is there a 3 terminal bosch coil too?

Yes you can use a bosch coil (w/external resistor) in place of your existing 3-terminal ignition coil, connect the wire coming from the distributor (contact point) to the - (negative) of you bosch coil, connect the + (positive) wire (you can check this by removing the wire for the existing coil, connect a test light, and start the engine, it test light turns on this is the + (positive) wire connect it to the + positive of the bosch coil, connect the remaining wire from the previous coil, and put it into the external resistor (yun wala pang wire nakakabit, doon mo ikabit sa wlang wire).

[bongski214]

thanks sir i thought it would be too challenging for a diy'er like me, i'll do this one btw sir which is better the red or blue bosch coil?

[paulgozon]

The Red Bosch Coil is the one with the External Resistor, this is my choice and been using it as a test coil in my auto shop

[chinesecarebear]

mga sir,

magkano naman yun red bosch na ignition coil at pati narin po yun blue?

ano po pinagkaibi nun 2?

[paulgozon]

The Bosch Red ignition coil has external resistor while the blue one has no external resistor. For the price i don't know the existing market price, but the red is much more expensive compared to the blue.

[electricx]

stealth,
if your car has electronic ignition, you do not need that resistor. the reason why ignition coils of yesteryears needed the resistor is to prolong the lifespan of the points or breaker points by reducing the current between its contacts. with this system, the ignition coil receives full battery voltage during start up for of course quicker starts, then when the engine has started and you released the ignition switch from start to run or on, the ignition coil receives a lower voltage because it is in series circuit with the resistor. if the coil has a resistor built inside, the available voltage at the output will be lower, hence the hard starting
jick

" the ignition coil receives full battery voltage during start up for of course quicker starts, then when the engine has started and you released the ignition switch from start to run or on, the ignition coil receives a lower voltage because it is in series circuit with the resistor. if the coil has a resistor built inside, the available voltage at the output will be lower, hence the hard starting "

The above statement is not correct, misleading to newbie particularly
to those who dont fully understand the IGNITION SYSTEM of a vehicle.

Little knowledge is really dangerous and transmitting wrong knowledge to readers.

[jick.cejoco]

" the ignition coil receives full battery voltage during start up for of course quicker starts, then when the engine has started and you released the ignition switch from start to run or on, the ignition coil receives a lower voltage because it is in series circuit with the resistor. if the coil has a resistor built inside, the available voltage at the output will be lower, hence the hard starting "

The above statement is not correct, misleading to newbie particularly
to those who dont fully understand the IGNITION SYSTEM of a vehicle.

Little knowledge is really dangerous and transmitting wrong knowledge to readers.

i apologize for your inability to fully comprehend the concept of the ignition system. please study the wiring diagrams of the ignition systems prior to them using the npn power transistors and the electronic ignition. peace bruddah

[reym]

Jick is right.

The original wiring for toyota point-gap includes a supply of 12 volts to the coil during startup, but once the start switch is disengaged, ignition switch provides the 12 volts to the external resistor w/c limits the voltage to the coil.

[barako ba ma]

Jick is right.

The original wiring for toyota point-gap includes a supply of 12 volts to the coil during startup, but once the start switch is disengaged, ignition switch provides the 12 volts to the external resistor w/c limits the voltage to the coil.

whatever happened to that einstein?:embarass: