Volvo s60 is still misfiring at 3000-4000 rpm. I changed the spark plugs and checked the coils and fuel injectors all good. Can't seem to find the problem. Any help! Also, my check engine light turns off but *** is still boging out at 3-4 rpm.

ignition coil 2 ignition coil 3 ignition coil 4 either one of coils is faulty.could have bad spark plug or plugs,could have dirty fuel injectors.code scan vechicle see what codes you have.

P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

Hi and welcome to FixYa!

It's common on all cars specially when years passes by. As a first course of action have the fuel injectors checked. There can be clogged injectors that's why you have misfires. Replacing the spark plugs and plug wires can help too.

Hope this helps and thank you for using FixYa! Have a good one!

no, you shouldnt have to clean it every week. it sounds like your pcv system is clogged. you have to replace the pcv box and hoses. and clean out all of the gunk clogging up the ports in the block. and it is probably a good idea to replace the intake manifold gaskets and the injector seals. also there is a banjo bolt on the bottom of the intake manifold that gets clogged up so clean the banjo bolts and all attached hoses

Hi:
This fault could be a spark plug wire too, and even a coil pack, or distributor component. Keep up the hunt for the problem!

misfire only comes from the coil packs.. replace them

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

Did you set the plug gap correctly?Improperly gapped plugs will cause the spark to be to cold or to hot and can cause misfire of the fuel wich would explain the vibration,this could also be caused by the wrong heat range on the plug.Check what spark plugs Volvo reccomends and the gap.

Faulty coil (pack)

Faulty camshaft position sensor

fuel filter and fuel

the p0300 car's computer has detected that one of the engine's cylinders is not firing p0301 In this case it's cylinder #1.p0302 In this case it's cylinder #2.and so on i would check the three listed above first then check

Faulty spark plugs or wires

Faulty oxygen sensor(s)

Faulty or plugged fuel injector

Burned exhaust valve

Faulty catalytic converter(s)

Stuck/blocked EGR valve

Defective computer Random misfires that jumps around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak that may be a broken hose or in the intake manifold (gasket,spary aruond it with wd40 or starer fluid if the engine idle goes high theres your problem) or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open. hope this helps

You may have a bad ignition coil or possibly a bad coolant temp. sensor. You can check for a bad coil by removing the covers for the plugs and gently lift the individual spark plug wires from the plugs while the engine is running. With the wires lifted off the plugs a small amount you should hear the spark making a ticking noise. If you lift it to far it could seriously shock you so be carefull.

If it's a bad temp. sensor the dealer will have to monitor the sensor and check it with a non conotact thermometer to verify it is correct.