2000 Volvo V40 How to replace fuel injector on 2000 V40?

Tiny
CHONG88888888
  • MEMBER
  • 2000 VOLVO V40
Engine Mechanical problem
2000 Volvo V40 4 cyl Front Wheel Drive Automatic

When I start the car, the engine sometimes vibrate and trigger the Check Engine light on. I replaced the spark plug and ignition coil, but the problem is still happen. What is the next step to check?

Should I replace the fuel injector?
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Friday, February 5th, 2010 AT 10:48 PM

8 Replies

Tiny
JIS001
  • EXPERT
What code is the check engine light posting? Is it a misfire code and what cylinder is it? Does the misfire go away after it warms up? If it does I would suspect a leaking headgasket. Remove all plugs and look inside the spark plug holes with a flash light. You will see the top of the pistons. They should have some carbon on them. If you see a nice clean shiny piston, then there is where the coolant is leaking at causing a misfire? Keep me posted and let me know about the code.
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Sunday, February 7th, 2010 AT 4:42 PM
Tiny
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It is the third cylinder misfired. I removed the plug and saw some engine oil there, not coolant thought. Yes, after it warms up, then the problem goes away. I will try to clean the oil up and see what happen tomorrow.

Thanks
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Sunday, February 7th, 2010 AT 9:58 PM
Tiny
JIS001
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Sounds like you could have a coolant leak from the headgasket. Remove all plugs and if you have a coolant pressure tester, put pressure to the cooling system and let it sit over night. Next morning if you have a bore scope, look inside and you will see the coolant.
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Tuesday, February 9th, 2010 AT 10:03 AM
Tiny
CHONG88888888
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The same problem: after starting the engine, the engine start rough, the light flash then on. I don't have the coolant pressure tester. I will look into it. If there is coolant leak, how to fix the leak?

Thanks.
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Tuesday, February 9th, 2010 AT 11:00 AM
Tiny
CHONG88888888
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Now I believe it is the headgasket problem. Should I try Steel Seal?
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Wednesday, February 10th, 2010 AT 12:59 AM
Tiny
JIS001
  • EXPERT
I would not recommend it since it can also plug up your radiator or heater core. But if you feel this is your only option then make sure you read and follow the directions it gives you. Go over the directions before you start so that you have everything ready. Also do it when you know you wont really need the car like on a weekend so you can let it sit for about 24 to 48 hours.
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Sunday, February 14th, 2010 AT 7:56 PM
Tiny
CHONG88888888
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I took the car to the shop to test the fuel line pressure and fuel injector. They told me the pressure is good ( I didn't ask what the pressure number) and the fuel injector is good. They couldn't tell what might cause the PO303 code. I asked them to swap the fuel injectors. They also said the Head Cylinder gasket is not blow yet, the cylinder pressure is also good. Is plug up your radiator or heater core can cause PO303?

Thanks.

Chong
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Monday, February 15th, 2010 AT 10:56 AM
Tiny
JIS001
  • EXPERT
No it wont. As for cylinder #3 misfiring, try this. This will be the cheapest to start with. Replace the ignition coil harness. Inside it is a capacitor that sometimes fails. Also make sure you have Volvo plugs installed. Usually if the capacitor is bad, you will get a misfire under load with the check engine light flashing. But if your misfire is only hapenning at cold start up and you have swapped the injector already, see if the misfire followed the injector. If it did you have a leaking injector and will need replacing. If it is still #3 cylinder misfiring, then trust me, you have a slow leak at the headgasket. Like I mentioned before, to check that you need to pressureize cooling system with the plugs out and let it seat overnight. The next day, go in with a bore camera and look inside on top of the piston for a milky residual. If you see that, then it is a leaking headgasket.
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Wednesday, February 17th, 2010 AT 11:12 PM

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