Tegger wrote:
> "loewent via CarKB.com" <u10197@uwe> wrote in news:7c109c0762390@uwe:
>
>> 98 civic, 289000kms, 5spd, non-vtec.
>>
>> Driving home in some snow tonight, car started running rough, as
>> though on 3 cylinders.
>>
>> CEL started flashing. Code was P0302 at first. My code reader
>> cleared it, then the flashing CEL came back. Read P0300, P0301,
>> P0303, P0304. No other codes.
>>
>> I recently replaced the cap, rotor and sparkplugs (all from
>> dealership). I am using Bosch plug wires (I know, but they have a
>> lifetime warranty apparently), so I replaced the wires with new bosch
>> wires (warranty as mentioned).
>>
>> While changing the wires, I decided to check the condition of the
>> sparkplugs. They all looked fantastic, but I did notice that they were
>> all pretty loose! Not falling out loose, but not tight.
>>
>> Tightened them down, seated the plug wires, and all seems OK now. I
>> also reset the computer as the idle was a little low after completing
>> the work.
>>
>> My question is: Did I solve my problem here, or is this a sporadic
>> problem perhaps with the ingitor? Anyone else out there have this
>> issue before?
>>
>> t
>>
>
>
>
> There is a known issue with the CR-V for exactly this problem. The CR-V has
> basically the same engine as the Civic.

crv is b-series - most civics are d-series [apart from the si].


>
> The CR-V's problem is exhaust valve(s) that have receded into their seats.

more likely the valve itself is getting hot enough to cup around the
seat - that's fairly common on other cars. valve seats on hondas are
high quality and in a highly conductive aluminum head - they rarely get
hot enough to actually recede.


>
> Check your valve clearances.

indeed.


>
> If possible, also do a cylinder leakdown test to check for burnt valves.

technically, leakdown is for rings. simple compression is for leaking
valves. and if they are, got to take the head off to replace.