Hi,

the wagon is running really lean since i changed the air filter. how does one adjust the fuel mixture? special tools? procedures? easy for a beginner-type like me?

i've heard a lean mixture can cause the NOX to run high so I'm hoping that a mixture adjustment might help me pass DEQ.

part 2, re: pinging: i am going to check the vacuum hoses to make sure they are all good. I've heard that spraying the engine very lightly with h20 can create a temporary seal to help you identify leaks..... I may try that as well as physically tighten/check all hoses.

Also I've heard that a stuck 'air intake valve' can cause pinging..... not sure how to check for that, any pointers?

final question - it's been pinging for about 2000 miles (not pinging whole time, just under load). i'm a bit nervous that this is trashing the engine. can you advise me whether pinging for this long would have caused a lot of damage or not?


(waiting for my bentley so i can get to work!).

thanks!
susan.

--
Emperor for Life - Leaky Volvo Club of America (LVCOA)