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'01 V70 T5 misfire issues

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Brandon4TW
Posts: 11
Joined: Tue Apr 18, 2017 8:34 pm
Year and Model: 2001 V70
Location: Illinois
United States of America

'01 V70 T5 misfire issues

Post by Brandon4TW » Tue Apr 18, 2017 8:38 pm

Had an odd issue here recently. I've been driving the car with pretty much no problems whatsoever(besides a random hard start issue hot or cold) til yesterday after filling up and getting to about 60 mph I started to get a flashing check engine light. It never stayed just would flash a few times then go away, then come back and flash again and go away again. The car ran like nothing was wrong the entire time, but I parked it as soon as I got home and haven't touched it since even though the light went off when I did. I ran codes only to find one pending code, P0300 for random misfire, and the light doesn't come on at all when I sit at idle. I recently replaced a crank sensor after having a code for it and for my catalyst below threshold, neither are still present (and it helped a little with the hard start issue) So any ideas? I'm thinking a tune up and inspecting coils, but all advice is welcome!

chrism
Posts: 666
Joined: Wed Jan 28, 2009 9:38 am
Year and Model: S80 / 2005
Location: Atlanta, GA

Re: '01 V70 T5 misfire issues

Post by chrism » Wed Apr 19, 2017 8:53 am

What kind of spark plugs are you running and how old are they? NGK BKR6ES copper core plugs work great in these cars and they're dirt cheap. So cheap it makes sense to pop a set in there "just to see if it helps".

Brandon4TW
Posts: 11
Joined: Tue Apr 18, 2017 8:34 pm
Year and Model: 2001 V70
Location: Illinois
United States of America

Re: '01 V70 T5 misfire issues

Post by Brandon4TW » Wed Apr 19, 2017 2:57 pm

Not sure what's in it now since I've owned the car for only 2-3 months after buying it off the original owner, I'm going to replace them with OE Volvo plugs and throw a new coil in place of whatever one looks worse. I'm going to go through connectors, relays, the fuel pressure damper, fuel and air filter, fuel pump/relay, throttlebody, and even ground straps and the battery. I've only been able to do a few small things to it so far, but I'm about to overhaul everything I can. With 180k on it I think it's probably needed.

Brandon4TW
Posts: 11
Joined: Tue Apr 18, 2017 8:34 pm
Year and Model: 2001 V70
Location: Illinois
United States of America

Re: '01 V70 T5 misfire issues

Post by Brandon4TW » Wed Apr 19, 2017 7:07 pm

Quick update, pulled plugs and coils. All five coils had cracks to some extent which was expected, however I did have oil pooling up top and it managed to seeped into the #2 spark plug tube. What gets me is that #4 was drenched with no signs of it coming from the top and #5 was worse. I know my pcv is likely clogged and will be replaced as well as an oil cap and the other four coils to accompany the one I already have and plugs. Now I can't help but think the cam cover seal may need to be replaced in order to replace the tube seals but is it worth it? Or should I replace the coils and plugs and my pcv system and hope it isn't as bad as before? I always do my own work but this job may be out of my reach unfortunately.

Brandon4TW
Posts: 11
Joined: Tue Apr 18, 2017 8:34 pm
Year and Model: 2001 V70
Location: Illinois
United States of America

Re: '01 V70 T5 misfire issues

Post by Brandon4TW » Thu Apr 20, 2017 10:33 pm

Another update: Seems the previous owner was running non turbo plugs, Volvo branded at that. You'd think after owning the car for 15 years that would be simple to avoid.

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