mtdineen

2000 CRV with B20Z2 at 137,700 mi. Tested the igntion coil (part of a rough idle and timing issue diagnosis). Primary winding showing fluctation between 0.9-1.3 ohms (64° air temp). Manual I have says replace if not between 0.63-0.77 ohms (@ 68°). What say you folks?

BTW, Secondary winding ok @ 15.6 K ohms (spec 12.8-19.2).

Pullig

What issues are you having? I remmeber checking mine as you have and the specs were slightly off as well. With the secondary in spec. Mine runs flawless Maybe try another test at the 68 degrees?

holmesnmanny

U have to subtract the internal resistance for the primary test. Touch the leads together and it should be .01


Your results look fine.

DCFIVER

Ohm testing a coil is about as useful as kicking the tires. If the coil ohms out bad,its bad.If it ohms out good,it could still be bad.


On a modern vehicle such as yours a scan tool is the only sure fire way to a quick and accurate diagnosis.



Otherwise you could be testing sensors up the wazoo looking for a fault....

mtdineen

Yeah, the coil is fine. Ohms testing with a MM is only good in some situations. Thanks folks!