S40 's' reg volvo no power on acceleration

Check vacuum leaks and fuel injection system

Hey, maybe the engine is just too small for big hill's :) but u can try to chance air filter and fuel filter and overlook the spark plugs (when it's a petrol engine)

the convertor is the problem.will cause decreased engine power, another sign is bucking and jerking upon accelerating. the car will lose power when going up a hill. if engine runs hotter then usual and coolant is up to par, may be a bad converter.

Yes that is correct. The only filter is inside the fuel tank, and as I recall its a non exchangeable filter. It just gets replaced with the fuel pump when it goes bad

its easy do thiers 4 of them thy push on to ur spark plugs 2 scews hold them in place disconect the leeds going on to the coil one by one then pull out and put in ur new one's

Volvo is a good car. if you maintain you volvo by changing the oil on time, maybe after every month according to how you drive and changing you fuel filter, using 93 grade fuel or 89. I advice you to keep your volve. do your oil change on time don't wait until three to five months before changing your oil and don't use poor fuel (87) grade. change your tranmission oil after 18 months then your volvo is yours for life.

no such switch

if you have over 125k miles on it chances are your about time for a new catalytic convertor... can cause a rotten burnt smell... lack of power.. and even a stall... or no start

My 1998 Volvo does the same sometimes. Better petrol helps for me, these engines like the higher octane petrol. My car does not like the BP petrol at all for example.

I had a similar problem. The breather pipe on the fuel tank got loose. You can push it back on. but it usually stays on for a day or two. Try to fasten it, (not much space), or replace the pipe. I noticed that the smell was the strongest, when you fill the tank to the full. There were also drops of fuel in the driveway at home, if I returned home directly from the gas station.