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Low idle on 2006 s40

Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant.
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Joined: Tue Feb 19, 2019 12:40 pm
Year and Model: 2006 S40 2.4i
Location: CO
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Low idle on 2006 s40

Post by VL1976 » Tue Feb 19, 2019 12:50 pm

Hi Everyone..

I have a low idle on my 2006 volvo s40 2.4i. When in idle the rpm/s are below 800 .. right around 650/700
I have no air leaks at least that I can see. No check engine light ether. It runs fine when I drive it. I have cleaned the MAF, Throttle Body, new Air Filter, new Spark plugs. I also put a can of seafoam in the tank as well. Have not checked the fuel pressure yet since I cant find any data on what it should be in idle.

I have purchased this car about a year ago and it was sitting in my driveway until now. I did not have time to play with it. At that time it needed a new CAT and new axles, brakes etc.... OEM CAT installed and working like it should...

Any clues what I might be looking at?