The Gent

Took my car out of storage this week (March 15) and drove the car a while but I sudenlly get a CEL while coasting in neutral (P0301 & P1399). I figure it may be bad gas since it was stored for 3 months (fuel stabilizer and injector cleaner was added before storing it). Go to the station and fill her up / Clear the codes (It was half empty).

Today (march 17 -- 200KM later) I get a CEL again while coasting in neutral preparing to stop. Check the codes again (P0301 & P1399).

P0301=Cylinder 1 Misfire detected
P1399=Random/Multiple cylinder misfire detected

Stuff done to the car during storage
-Spark plug recall @ Honda dealer
-Engine/tranny/diff/brake/clutch oil change (no relation with problem)
-removed the intake cover (what the hell, i love the sound)
-Car has 47000 miles - 2001

I read in previous post that people who have this problem are usually completely idle or in vtec. What could be wrong? Should I check; spark plugs, coil, injectors ,compression test,valve ajustment? The car runs fine. Had the car only 7 months total so I can't tell you the history of the car.

Thanks

ChefJ

valve adjustment first. Gas may be junk.

negcamber

This thread may help diagnose the problem:

https://www.s2ki.com/forums/index.php?showtopic=659930

The Gent

Well, the car has only 47000 miles but it will get a valve adjusment on tuesday. While he is there he will also check spark plugs, coil and engine condition. I will report back on tuesday.

Im just being carefull since I don't know where the car is coming from.

I have a feeling it has something to do with the spark plug recall that was done before the winter.

Car will also be getting the testpipe installed (couldn't get the cat off).

RockyMountainS2k

I have that same problem on mine.

Valve Adjustment
Spark Plugs
Coils

are the first thing you check i work for honda and the honda oem coil packs are ****ing useless they just randomly die or quit or wear out. ****ing garbage i say.

Also if those dont solve the problem

It says to check
Fuel
Fuel Filter
Injectors

In other words

Valve Adjustment and Seafoam.

The Gent

Well, I put my airbox cover back on and no more check engine light (Over 400+ km).

Im guessing either vacuum leak or the ecu doesn't like the airbox cover off (Cyl 1 is first one closer to intake).

The Gent

CEL came back twice yesterday. I guess that air box cover wasn't the fix.

Will switch coil and sparkplug around this weekend.

Note: Valve adjustment and test pipe was installed that day

The Gent

Moved coil 1 to coil 2 and moved coil 2 to 1.

Now Im getting a misfire on Cylinder 1 AND Cylinder 2. ~50 KM after clearing cell while coasting to a stop

Im wondering... The coil 2 must be bad. But why still a misfire on cyl 1? Bad coil on Cyl 2 and spark plug Cyl 1? Or does the bad coil affect the ohters?

March 15: after ~150 KM CEL - Coasting to a stop (P0301 & P1399)
March 17: after ~150 KM CEL - Coasting to a stop (P0301 & P1399)
March 19: after ~150 KM CEL - In Between 2-3 shift (P0301 & P1399)
March 25: after ~500 KM CEL - Coasting to a stop (P0301 & P1399)
March 27: after ~50 KM CEL - Coasting to a stop (P0301, P0302, P1399) After coil 1>2 switch

Can anyone help?

leets

fuel injectors

s2kobsession

this is a good thread. subscribed.