My 1991 Honda Civic has a functioning timing belt, a well charged battery new distributor cap and rotor, and no spark. There is no primary igntion voltage at the ingnition coil. If I trace the ground wire back to the main engine harness there is good ground all the way up to where that wire enters the underside of the distributor. What are the possible causes for this loss of electrical continuity?
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Re: 1991 Honda Civic No Spark
Excessive resistance in the wire (including breaks or shorts) or the fault is not the wire itself but what feeds that wire its power.Have you run a seperate wire from the battery to feed power to that wire yourself.?Does the car start if you do?
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If you look at the distributor cap from the wires side carefully, you would find either a line mark on one of the outer side of four holes (where the spark plug wires are inserted) or the numbers printed on the top of distributor cap (1,3,4,2). Fix one end of the longest high tension plug wire into number 1 hole or the one marked with a line mark on the distributor cap and the other end on spark plug number 1 (the number 1 plug is toward the pulleys and the belts side, then No 2, No 3 and No 4). While standing in front of right wheel you will see the distributor cap in front of you. The rotor moves clock wise. After you fix the 1st cord, next comes number 3 plug wire. Insert one end of the cord into the next to 1 on the right hand side and press the other side of the cord on spark plug number 3. Next to 3 is the cord number 4 and the last one is number 2.
could have bad ignition coil or check for power at ignition coil could have blowed fuse or ignition timing off,make sure the distributor cap and rotor are new or in good shape if rotor bad worn out you wont get spark at spark plugs.
Remove distributor cap, crank engine, see if distributor rotor turned, if it don't turn, bad timing belt, replace, if it does turn, more then likely, ignition control module, if timing belt bad. made br will help you to set in bad on timing, when replacing timing belt, hope this was very helpful.
Cylinder #1 will be the one closes to the fan belts and so on 1-2-3-4, on the distributor cap there should be a # 1 stamped on it, put cylinder # 1 spark plug wire on that one, install spark plug wire in firing order clockwise on the cap, the cap some time's might even have the firing order on it.
It is one of two things, First pull the distributor cap off and make sure the rotor is turning when you cranck the starter. If not turning, then you need a timing belt. If it's turning then you need a module in the distributor(cheaper to buy a complete used distributor ).
if your not getting spark then your coil is the mostlikely cause it's obviously not a timing issue since you stated that the rotor is spinning. if the spark plugs are bad then replace them too . to be sure that your getting spark to all cylinders test each of the spark plugs after replacing the coil. just to besure it's not starving for fuel as well spray a little ether in the breather if it fires off right away that means the even though your fuel pump works it may not have a high enough pressure. let me know the results