2001 Honda CR-V Misfires P1399

63vette

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Thank you nickb2, sorry about the lengthy post. I just wanted to provide what I considered to be pertinent details as to symptoms and what has been done to date. Regarding the fuel pressure, off hand I don't recall the source but I had seen that the fuel pressure for this vehicle is supposed to be between 40 to 47 psi. It didn't specify under what conditions (idle, under load, etc.). I'll do some more checking around but if you're right, I'd be thrilled to replace the fuel pump on this because it's one that can be accessed from the top (under the driver side rear seat). Being a typical Ohio rusty mess, I dread every time I have to drop a gas tank to replace a fuel pump. Also, I'll test the fuel pressure regulator which I didn't do because I thought the pressure was within spec.
 

nickb2

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That being said, we know at least 1 psi below of fuel is getting there, so that in itself does not worry me, but idle fuel pressure @ 39psi does, suspect fuel; filter first.

what is compression? Does the engine burn oil? If it does, that also can cause all kinds of misfires. Are the wires ohm/resistance checked yet? If not, 10000ohm per foot. That is very approx, but still hold true.
 

nickb2

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Anyway, yeah, I dont think this is a fuelp PUMP issue per say.

I am merely asking you if you know that fuel filter is newish.

If so, we move on.

In these distributors, the inside needs to be cleaned once in a while. Spark plug wires not crossing each other, no oil soot on plugs etc.

If all basic maintenance is done, problem still there,now this thread just got really interesting. :bat::p
 

nickb2

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and just for you mr 63vette, my sister (RIP) loved this song, I hope you like it also.

I played well when tinkering on a car in your spot and the wife or kids are laughing.

My niece and nephew are going to need me now more than ever. Uncle Nick is listening and here.


 

nickb2

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As an afterthought to bill's comment on live data, this is a good option and works for other cars also. wink.

Not the quickest thing in the world, but does show basic data, for abs also. double wink. 169$

 

63vette

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Again, many thanks nickb2.
I'm responding to your questions, suggestions and comments in order of your posts:
* I was reviewing my records and revisited the source that I used for the fuel pressure. It was the same site that your link sent me to! That's where I got the spec of 40 to 47#s. I did miss the the second part of the test, KOER, where I should have disconnected the vac hose from the regulator. That has now been added to my to do list for Monday. I had already mentioned that I had put a test drive while monitoring the fuel trim to my list, too, along with testing the regulator itself.

* The optispark suggestion has also been added to my list (which is growing rapidly!).

* The compression was fairly even across all cylinders at about 190#s. The engine doesn't use much oil for the mileage and it appears that what little it does lose is leaking more than being burnt.

* The plugs and wires were replaced 1 year and about 10K miles ago. I checked the wire resistances within the past month.

* The fuel filter was replaced about 4 years and 40K miles ago. I've been on the fence as to whether it makes sense to replace it again.
Sorry, it's been awhile since responding. I watched and listened to the video that you posted and was called to dinner after that. Thank you for the video. So sorry to hear about losing your sister. It seems clear that her kids are very lucky to have a caring uncle.

* I have been using Auto Enginuity's OBDII enhanced software for Domestics on a series of laptops/notebooks for about 20 years. 15 years ago, I semi-retired and opened a one-man shop and added the enhanced package for "Asian" vehicles.
 
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