Hey guys.
Quick question. Car developed a rough idle and is misfiring. It's my kids' college car so I don't know exactly how long it's been like this. I pulled codes and it reported a misfire on cylinders 3,4,5. Last night I swapped the #1 and #5 plugs & coils, cleared the codes, and drove it today. Codes now show cylinder misfire on cylinders 1 and 2.
I'm going to throw new plugs in, but wondering about coils. Would 1 bad coil impact a bank of cylinders?
Thanks
Nick
2003 XC70 Misfire Question (New Plugs and Coils) Topic is solved
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JeffHicks
- Posts: 270
- Joined: 22 October 2013
- Year and Model: 1989 240 Wagon,
- Location: United States
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Start with plugs, but be prepared to replace coils. Obviously you know that you can swap them to see if a misfire follows one coil from cylinder to cylinder.
You should probably also closely inspect all the wires running to the individual coils. If the plastic cracks on those - and it often does - it can cause some weird problems.
For what it's worth, I've had good luck pulling used coils off a couple cars at a local U-Pull-It Salvage Yard. $10 per coil, and the 4 I swapped into any of my cars are still working fine. It's a crap-shoot, but if you're wanting to save money that might be something to think about.
You should probably also closely inspect all the wires running to the individual coils. If the plastic cracks on those - and it often does - it can cause some weird problems.
For what it's worth, I've had good luck pulling used coils off a couple cars at a local U-Pull-It Salvage Yard. $10 per coil, and the 4 I swapped into any of my cars are still working fine. It's a crap-shoot, but if you're wanting to save money that might be something to think about.
1989 240 Wagon, 1999 V70 Base, 2002 XC70, 2005 V70 T5
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FLXC90
- Posts: 1132
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- Year and Model: 98 V70 T5
- Location: Florida Panhandle
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Keep in mind with the coils, if one goes, then the set are likely nearing the end of their lives. If you can, change them all, especially for a geographically separated driver. Otherwise/also, educate the drivers to watch for the flashing CEL indicating misfires, so they can get codes read if need be.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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