2001 V70 XC Ignition Coil

schuyler_mason · Post by **schuyler_mason** » 06 Jul 2010, 17:32

My mechanic tells me I have one bad ingition coil and recommends replaceing all of them. Although I'm not one to work on my own vehicles, I'm learning this is a relatively basic procedure and a good project for beginner DIY'ers. I've come across one step-by-step procedure but would like to compare to another if someone has a source. Also, welcome is any additional thoughts, ideas, concerns.

Also, in the event I decide I cannot afford to replace all five, is there a way to determine which one is the bad coil?

Thanks

jda2000 · Post by **jda2000** » 06 Jul 2010, 19:35

CEL light would indicate a misfire code for offending coil.

Change the offending coil with the next one and see if the CEL code indicate the misfire in the cylinder you put the bad coil.

That tells you that indeed that coil is bad. Easy to replace, and you don't have to replace all of them.

walterschweigert · Post by **walterschweigert** » 06 Jul 2010, 22:10

Is there a way to diagnose the coil using a DVOM and by taking a couple readings by measuring the OHMs?

Georgeandkira · Post by **Georgeandkira** » 07 Jul 2010, 06:22

Hello, I was asking myself the same question. But, with the ease of reading the code which specifies the problem cylinder AND the ease of swapping two coils to make the diagnostic code jump to another cylinder, dealving into a pin-by-pin test ,while not hard, is unnecessary. Get a code reader. You'll save money on gas driving to a parts store to borrow their's. You can change those coils with a torx bit (for the plastic cover) and a 10mm wrench (for the little hold down bolt). You'll laugh at how easy it is. Kira

jda2000 · Post by **jda2000** » 07 Jul 2010, 07:02

[quote="Georgeandkira" You'll laugh at how easy it is. Kira[/quote]

exactly

walterschweigert · Post by **walterschweigert** » 07 Jul 2010, 07:45

I have a code reader, its just that I would prefer to not rely on the computer to set a code. Seems to me that it would be way easier to buy a DVOM and know how to use it than to switch the coils.

skibo · Post by **skibo** » 08 Jul 2010, 20:48

An easy task, but when I took the cover off to change spark plugs, I removed the turbo pipe for better access and broke off the plastic top of my dipstick in the process.

schuyler_mason · Post by **schuyler_mason** » 11 Jul 2010, 09:23

CEL never came on which means I've been unable to get a code from my reader. The bad coil was what the mechanic told me. He went on to say, the bad coil was overheating causing the fuse to blow. Replace the fuse and the car will limp on the remaining cylinders or at least until the fuse blows again. Which it did on the way home (fuse blew or so I think) only this time the fix wasn't remedied by replacing the fuse. I suspect something else is going as now the car wont even start. However, I was hopeful that replacing what I thought was the ailing coil (when I took the cover off, I noticed #5's connector loose and clip not quite seated) might get me going again but resulted with no success. I've deduced that even with a bad coil, the car will continue to run. Since I'm unable to even get the car to start, I'm thinking there's another issue.

Thanks for your thoughts and welcome more.