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> Cylinder Misfire (p0300, P0303, P0304, P0305)
cmayo313
post May 24 2010, 09:01 PM
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I have a base model '96 850 with the following codes popping up, P0300, P0303, P0304 and P0305. I recently replaced the plugs and wires hoping the CEL would go away, but it has not. I have reset the codes as well, but the CEL eventually comes back on with the same codes. Other than the car starting up a little rough, it runs smooth. Does anyone know anything else i could do to possibly fix the misfires? Thanks.
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SeaMike
post May 25 2010, 05:48 AM
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QUOTE (cmayo313 @ May 24 2010, 09:01 PM)
I have a base model '96 850 with the following codes popping up, P0300, P0303, P0304 and P0305. I recently replaced the plugs and wires hoping the CEL would go away, but it has not. I have reset the codes as well, but the CEL eventually comes back on with the same codes. Other than the car starting up a little rough, it runs smooth. Does anyone know anything else i could do to possibly fix the misfires? Thanks.



What plugs did you put in it? What did you gap the plugs at? What ignition wires did you put on the car? How long has this been going on?

Did you replace the Distributor Cap/Ignition Rotor?

Have you pulled the codes in all the other areas?

What is the condition of the battery, alternator? Some Auto Zones have a BIG machine that they can roll out to your car and test the alternator/battery on the car while running.

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cmayo313
post May 25 2010, 09:31 AM
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For plugs I used Autolite and for wires, NGK. This has been going on since I bought the car about a month and a half ago. I have not replaced the distributor cap/ignition rotor. I have yet to check the condition of the alternator, but the battery is in fair condition.
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SeaMike
post May 25 2010, 11:00 AM
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QUOTE (cmayo313 @ May 25 2010, 09:31 AM)
For plugs I used Autolite and for wires, NGK. This has been going on since I bought the car about a month and a half ago. I have not replaced the distributor cap/ignition rotor. I have yet to check the condition of the alternator, but the battery is in fair condition.


Is this your first Volvo 850? Did you pull any other codes other than the ones you already listed?

Does your car have the OBD I plugs in the front left area? Look at this link. http://volvospeed.com/Repair/a2.html

Does the car take a while to start?

What state are you in?

These are the two best places to get parts for your car from:
http://www.fcpgroton.com/index-exec/sub_to...1136/by_year/46

or

http://www.ipdusa.com/Volvo-850/c-1-72/

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cmayo313
post May 25 2010, 08:19 PM
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This is my first Volvo in general. The only other code I pulled was for an O2 sensor which I had replaced a couple weeks ago. My 850 does not have the OBD I plugs. The car starts on the first attempt, but it sounds rough. I'm in New Hampshire and I have checked out both sites, I just don't want to get something I won't need.
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SeaMike
post May 25 2010, 09:40 PM
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QUOTE (cmayo313 @ May 25 2010, 08:19 PM)
This is my first Volvo in general. The only other code I pulled was for an O2 sensor which I had replaced a couple weeks ago. My 850 does not have the OBD I plugs. The car starts on the first attempt, but it sounds rough. I'm in New Hampshire and I have checked out both sites, I just don't want to get something I won't need.



I think the next things to do are: A dry compression test, and a wet compression test.

This will help rule out bad rings, and head gasket issues.

I would put a Volvo Dist Cap/Rotor on it first.
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cmayo313
post May 25 2010, 10:22 PM
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Sounds good, thanks for the help. I'll get a cap/rotor on within the next week or so once work calms down. I'll post if I have any further issues or if that was the fix. Thanks again.
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cmayo313
post Jun 20 2010, 06:16 PM
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Sorry for the late update. I just installed a brand new distributor cap/rotor and I still have the CEL. I disconnected the batterey and even erased the codes. I re-scanned when the light came back on and I got the same 4 codes. What's next, a dry/wet compression test?
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cmayo313
post Jun 20 2010, 06:17 PM
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Duplicate post by accident.
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SeaMike
post Jun 20 2010, 06:48 PM
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QUOTE (cmayo313 @ Jun 20 2010, 06:16 PM)
Sorry for the late update. I just installed a brand new distributor cap/rotor and I still have the CEL. I dosconnected the batterey and even erased the codes. I re-scanned when the light came back on and I got the same 4 codes. What's next, a dry/wet compression test?


Do you want to call me? It might be faster, If so, just let me know and I will send my cell number in a private message.

Mike
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cmayo313
post Jun 20 2010, 09:02 PM
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Unfortunately my phone is broken and I'm still waiting for the new one to arrive. I just did another re-scan and the only code that popped up is P0300 (random/multiple cylinder misfire).
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SeaMike
post Jun 20 2010, 09:20 PM
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QUOTE (cmayo313 @ Jun 20 2010, 09:02 PM)
Unfortunately my phone is broken and I'm still waiting for the new one to arrive. I just did another re-scan and the only code that popped up is P0300 (random/multiple cylinder misfire).



Don't disconnect the battery, your car has to relearn things over again. See procedures that are attached.

Autolite plugs are ok, but the Volvo plugs I put in STOPPED all my random missing out. These are it: http://www.fcpgroton.com/product-exec/prod...category_id/111

As far as plugs wires for Volvos these are the best and last for many years. http://www.fcpgroton.com/product-exec/prod...category_id/111

ALWAYS check the gap of the plugs. The plugs I use are

Do you have a multimeter? If so, start the car, turn on EVERYTHING, check the voltage across the battery between the (+) and (-) terminals. You should have around 12.2 volts, with everything off is should be around 13 - 13.5 volts

Attached File(s)
Attached File  computer_relearn_procedures.pdf ( 33.82K ) Number of downloads: 26
 
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cmayo313
post Jun 21 2010, 01:15 AM
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I believe I have a multimeter around here somewhere, if not I know a friend has one I can borrow. If the CEL is still on within a decent amount of run time, what should be done next?

I may get those Volvo plugs and give them a shot.
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SeaMike
post Jun 21 2010, 06:04 AM
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QUOTE (cmayo313 @ Jun 21 2010, 01:15 AM)
I believe I have a multimeter around here somewhere, if not I know a friend has one I can borrow. If the CEL is still on within a decent amount of run time, what should be done next?

I may get those Volvo plugs and give them a shot.



Ok, what we are going to do next may seem like a long shot, but trust me. Mine was bad, and it caused missing issues.

First, take your air filter canister out.
Look at the bottom and you will see this "Y" shaped thing attached to the Rectangular Air Filter Housing - see "Picture Volvo Heat Deflector"
When you look on the inside you will the trap door - if it is warm up there (above 60 degrees), then the gate should be open towards the front (Cold Air) side. The Picture attached-Volvo Heat Deflector open towards Exhaust Side, this trap door should be in the other position.

What position is your Trap Door in?


Second, When you put the new cap and rotor on, was Part # 7 "Dust Cover" in the "Distributor Parts" PDF in there?

On Volvos the electrical portion of the car must have clean power to everything, or the cars have issues.
Third, Check (Unloosen and make sure all contact areas are clean/shinny and rust free-put back on and re-tighten the bolts) all the Ground Strap that ground the engine to the chassis, also under the battery tray is a main ground strap.

How many miles are on the car? Do you know when the timing belt was done last? Is there a sticker on the Timing Belt Cover with a date/miles when the belt was done last?

Mike


Attached File(s)
Attached File  Distributor_Parts.pdf ( 118.72K ) Number of downloads: 23
Attached File  Volvo_Heat_Deflector_open_towards_exhaust_side.JPG ( 149.33K ) Number of downloads: 23
Attached File  Volvo_heat_Deflector_Cold_Air_side_view.JPG ( 142.55K ) Number of downloads: 19
 
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cmayo313
post Jun 21 2010, 07:29 PM
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I read your post quickly before work this morning and it dawned on me half way through the day that i never put part #7 that you mentioned back in (IMG:style_emoticons/default/wacko.gif)

I just took off the distributor and put that piece back in, did a quick re-scan, and came up with the codes P0300, P0303, and P0305. I went and checked everything over and erased the codes. Did another re-scan and came up with only P0303. I erased that code again and have yet to see the CEL back on. Usually it's been coming back on fairly quick once I erase. I'm keeping my fingers crossed for tomorrow's drive to and from work that it'll stay off.

However, if it does come back on, I will take a look at my air filter canister.
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cmayo313
post Jun 22 2010, 06:33 PM
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The CEL appeared on the way to work this morning. I just got home and came up with P0300 again. Tomorrow night after work, if it's nice, I'll take a look at the trap door in the air filter canister and make sure everything is clean.

As far as mileage goes, the car is TMU. The odometer stopped at 222,501. I am unsure of the timing belt, but I will also take a look at that tomorrow.
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SeaMike
post Jun 22 2010, 06:44 PM
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QUOTE (cmayo313 @ Jun 22 2010, 06:33 PM)
The CEL appeared on the way to work this morning. I just got home and came up with P0300 again. Tomorrow night after work, if it's nice, I'll take a look at the trap door in the air filter canister and make sure everything is clean.

As far as mileage goes, the car is TMU. The odometer stopped at 222,501. I am unsure of the timing belt, but I will also take a look at that tomorrow.


Make sure the door is in the correct position - face the cold air intake side
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cmayo313
post Jun 25 2010, 11:43 AM
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I just checked the trap door and it is in the correct position, intake side is open.
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