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Discussion Starter · #1 ·
Today in VIDA my car popped the 3 way cat efficiency code and the Evap pump no signal codes.

I just changed my fuel filter and plugs. Plugs all gapped good, used Volvo long thread ones from FCP.

I have a rough idle as well. Thinking it might be a vacuum leak.

Recommendations for next course of action?
 

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Even a big vacuum leak won't make the idle bad, just high. Been there, done that when I blew off the evap system line one time.

Do check the evap and other vacuum hoses though if it thinks the evap system is failing though. If a leak is really throwing off the fuel trim it could possibly be the source of the cat code, so try to correct the other issue before turning your attention to the cat.
 

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That sounds like a misfire not a vacuum leak. You can remove all of intake tubing at idle its not pressurized.
 

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Discussion Starter · #4 ·
Yeah. Hoses look good most places. No pressure detected when I open the fuel cap or dipstick. I'll do the glove test tonight and see.

I may pull the Intake and replace all gaskets/check all hoses under there.
 
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