My Volvo s40 2.0 none turbo burns oil and is slower and misfires sometimes hard start when hot what causes this?

could be dirty oil, worn rings, plugged PCV valve, worn valve seals, too much oil in crankcase, if its a v6 could be an internal intake leak. the miss fire is from it burning oil.

plugs and wires. yes wires are the biggest issue with a misfiring engine. check the gap on the plugs. sometimes they are gapped to far and cause a cold misfire issue. simply pulling plugs and look at color of the insulator will tell the condition of the engine. normal should be a golden tan color darker means its to rich or burns oil white ask means to hot and should use a colder plug

Does the smoke smell like burnt antifreeze or motor oil?

Do you have the turbo model? If so you could have a bad turbo. You may also have bad valve seals or piston rings. If you have a turbo you can remove the hose or pipe off of the outlet side of your turbo between the turbo and the intake manifold. If there is oil in it your turbo is leaking and will need repaired.

i hope you are using nothing but SYNTHETIC oil.The turbo is intercooled by oil.If the turbo is gone,it will **** oil into the intake system and burn it.

have you tried to run finger around inside of tail pipe to see if its burning oil!! but do this when it is cold. you may also have bad oil rings on pistons. if it is burning oil it will smoke very little if any. because the convertor runs so hot it will burn up all the oil residue. so you may noy be able to see any smoke. have a good day!! check carefully all gaskets for oil leaks, and also make sure oil filter is hand tight, sometimes a loose oil filter will start leaking oil.

A new turbo charger is about $340, but you can buy the bearings and seals and rebuilt if yourself for about $100
http://turbosandparts.com/
It is not hard, and it does not take long to do.

I normally do not bother with synthetic, but with a turbo charger, it might be worth it. What really seems to ruin turbo chargers the most is not letting them cool off before parking.
Once you turn off the engine, there is no longer any cooling, so the build up heat will burn up the oil and seals.
Run the engine for at least 5 minutes below turbo levels, before shutting down the engine.

Re: 2000 Volvo S40 L4 1.9 Liter L4 1.9 Liter Turbo FI

Are you consider yourself a handy person?

Swap the coil and see is the misfire going to follow to another bank of cylinder.

You has total of 3 coil in your engine.

Do a detail record map and switch the two coils.

A replacement aftermarket coil is oil $46 w/one year warranty and $55 will get you a life time warrent coil.

Do the swap and see what happen.

A leaky/failing injector can also cause the same problem.


Do a Chevron Techron fuel injector clean ran and highway ran.

Good luck

First thing, check your timing. That should help with the had starting. Depending on how hot you car got when the gasket went out you could have burned your oil or galded a bearing. Take a long screw driver a put one end of it up to the oil pan and the other side to your ear and listen for knocking or rattling in the bottom end. Sounds like you are going to need a complete engine rebuild.

sounds like you have a turbo with a bad bearing.
pull of the turbo and rotate it by hand to see if it is hanging up.
Most turbos start to make a different noise when they start to go.
Sometimes dirt can bypass the air filter if is not changed on a regular basis and can cause the turbo to fail or become dirty enough to cause it to spin slower, (the dirt prevents the exhaust to spin the turbo at the right speed and the air passing the fins can whistle), it will cause bearing failure after a while. Also if you have too much soot in your exhaust from too much oil, the exhaust side of the turbo can become too dirty to operate properly