11 replies to this topic

[Subaru_Mechanic]

no spark??? what else do you need to know?

[grossgary]

no spark where? at the plugs or out of the ignition coil? first step is to determine that. if there's spark from the coil but not at the plugs then your problem is with the distributor cap, rotor, ignition wires or spark plugs. if there's no spark out of the coil then there are a number of possibilities that have increasing levels of difficult to figure out. first i'd swap in another coil and/or FET resistor (the little thingy attached to the coil bracket that bolts and grounds to the strut tower underneath the coil). this FET needs to be grounded well, make sure the bolt is in place and no funny business with the metal there..paint or rust issues?any other recent issues or work done? or the car was fine and then bam...no spark?

what engine/vehicle? carb, FI....etc?

[grossgary]

i just edited my last post, check my more detailed revisions if you were constantly monitoring this thread.

[Subaru_Mechanic]

i just did an engine swap. and threres no spark outta the coil. there are three wires goin to it two yellow and one black. carb. 1986 coupe EA82 engine

[86BRATMAN]

have you checked for voltage going into the coil itself

[Subaru_Mechanic]

dont have a volt meter. but if there wasnt i need to fix it.

[grossgary]

on the XT6 there's a ground wire going from the coil to the front drivers side of the engine. i don't know how an 86 EA82 is set up but i'd imagine there's a similar single wire ground wire going somewhere from the coil....is that connected?

this isn't that whacked out carb/ECU weird combo engine is it?

[Subaru_Mechanic]

ill check, yea it really is odd.

[Subaru_Mechanic]

ok nothing happened. the coil has a positive and a negitive. about how many wires go to it and what colors go where? where does the main battery ground go?

[Subaru_Mechanic]

okay i did a bunch of wire switching and nothing happened. i cant find any info on this either. i just swaped in a new engine and im not gettin any spark. the coil seems dead. what now:confused:

[NoahDL88]

Get yourself a volt meter, or at the very least a test light, you're not gonna be doing any electrical diag without it.

once you get the proper tools, check for 12 volts at the + side of the coil, and see if that's getting the juice.

After that pull the center wire off of the disty and hold it close to any metal part of the engine, and have a buddy crank over the engine, see if you have spark.

If you have spark there, its an issue with the disty connections, if you don't, your coil or wiring to the coil is bad.

[Singlecoil]

The yellow wire goes to one of the side posts on the coil, and the black with white stripe goes to the other side post on the coil.