Could bad PCV system cause engine misfire?

gvanzant1 · Post by **gvanzant1** » 22 Jan 2013, 12:11

I suspect I have a bad PCV due to the amount of oil leaking from various places, including my distributor. Could this cause an engine misfire? I get ODBII codes for "multiple engine misfire". Replacing the PCV seems a huge hassle since it's located under the manifold. I know it needs to be done but I'm wondering if replacing the PCV will cure my misfire problem. I replace the distributor cap and rotor a couple weeks ago and it still misfires. The old cap did have oil build-up on the contacts. I've also replaced the fuel filter and cleaned the MAF Sensor and tried a couple tank fulls of Premium gas. Still misfires.

George
1998 S70 non-turbo
135k miles

Post by **cn90** » 22 Jan 2013, 12:28

Step 1: Overhaul the PCV:
https://www.matthewsvolvosite.com/forums ... hp?t=53448

Step 2: Replace Rear cam seals (SKF 11809 $10 at local Napa store):
https://www.matthewsvolvosite.com/forums ... hp?t=50752

Step 3, clean or replace cap/rotor.
Maybe time for new Bougicord too ($55).

Post by **jblackburn** » 22 Jan 2013, 12:45

Yeah, an oil-coated cam sensor or distributor could do that.

deltajets · Post by **deltajets** » 23 Jan 2013, 07:54

Rear cam seals,see my most recent post.