I pulled my ignition coils because I plan to swap the front and rear ones to troubleshoot a misfire. When I pulled them out, I tested their resistance, as shown in the Whitney Automotive video on YouTube. All 4 of my coils show a higher resistance than in the video. But it seems like testing for resistance wouldn't be the most accurate way to see if they're bad, unless you're getting practically no resistance when you should be getting some, or vice versa.
Anyway, the resistance on one of my rear coils is quite a bit lower than the other three. So I went to look at the receipts for the coils, because the previous owner said he had put in new coils and that they had a lifetime warranty. Now that I'm looking at the receipts more closely, I see that one coil was bought from one store, and it's a $60 coil. 2 were bought from another store, and they're both $30 coils. And one there's no receipt for a 4th coil, so I have to assume it's old.
With coils being sourced from potentially 3 different places, could that cause me any problems? I think I'm going to just replace all 4 to be safe. Just curious if having different resistance on the different coils (or other subtle differences) because they're from separate manufacturers would cause any problems.
Anyway, the resistance on one of my rear coils is quite a bit lower than the other three. So I went to look at the receipts for the coils, because the previous owner said he had put in new coils and that they had a lifetime warranty. Now that I'm looking at the receipts more closely, I see that one coil was bought from one store, and it's a $60 coil. 2 were bought from another store, and they're both $30 coils. And one there's no receipt for a 4th coil, so I have to assume it's old.
With coils being sourced from potentially 3 different places, could that cause me any problems? I think I'm going to just replace all 4 to be safe. Just curious if having different resistance on the different coils (or other subtle differences) because they're from separate manufacturers would cause any problems.
Is it ok to mix and match ignition coils?
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