Coil connector reading

WALT$

MEMBER
2005 VOLVO S60
5.2L
5 CYL
2WD
AUTOMATIC
2,222 MILES

I have a misfire with cylinder 2. Why I'm getting 11 volts on my coil connector without the engine running but ignition on?

Sunday, June 21st, 2020 AT 12:40 PM

3 Replies

KASEKENNY

MECHANIC
18,907 POSTS

Which wire are you getting 11 volts on? I attached the wiring diagrams for your review. If it is the Green/White wire, I suspect this is normal. Compare it to another cylinder but you should have the same on each. The way it works is you have battery voltage on this wire when the key is in the on position. Then when the PCM wants to fire the spark plug it energizes the yellow wire (primary side) which then gets grounded through the spark plug.

So you should only have 12 volts on the yellow wire with the engine running and when that plug is firing.

Let me know if you have questions. Thanks

Images (Click to make bigger)

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Sunday, June 21st, 2020 AT 6:59 PM

WALT$

MEMBER
2 POSTS

Thank you Kasekenny1. I didn't fully understand the electrical diagram as far as the yellow wire and the ground. I tested the coil connector plug itself and received readings while the ignition switch turned to on without cranking engine. Also got same reading on three separate connectors, so this must be normal.
The main issue is, I've changed all 5 spark plugs and ignition coils, yet still has a miss fire on cylinder 2, which had exposed bare wires that I've taped up. Did job myself cause I didn't want to pay the shop $800 they were asking. With all this done, what can be the problem?

Was this

answer

helpful?

Yes

No

Sunday, June 28th, 2020 AT 12:51 PM

KASEKENNY

MECHANIC
18,907 POSTS

What wires were bare? Can you get a picture of this because that could be the issue.

As for a misfire, it is more then just ignition issues. Take a look at this guide and send me a picture of that wire.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Thanks

Was this

answer

helpful?

Yes

No

+1

Sunday, June 28th, 2020 AT 9:06 PM