I had the same codes coming up on my 97 Accord. I researched this forum, along with some others and found that the P1399 code is pretty mysterious and covers a slew of issues. Some had luck with replacing the dizzy and cap, another had luck with replacing his injectors. I replaced my plugs, wires, dizzy and rotor with no luck. I then did some research on the EGR valve and found that could be causing the P1399, along with the other misfire codes. Before I replaced the EGR valve I cleaned out my EGR ports. Car has been running great since.
Well it turned to be my valve....lol. After taking it to my performance mechanic(which i should've done first) I blew one of my valves on the head. So i just replaced the head because i didnt feel like resleeving the valve on my head. well hope you guys find your problems..
i am dealing with a car right now that came in with misfire codes. we did a compression check and all were good except #3, put the boroscope in and one of the exhauast valves was melted. so we pulled the head and installed a new honda valve then put everything back together with new plugs. (cap/rotor/wires/etc. had been replaced recently) now the car has good compression but throws the p1399 code an runs like *** so i would like to know if anyone has figured out why these accord 4cyl's are burning valves.
all four injectors sound like theyre functioning with the stethascope.
There are two things in life where penetration is really important.....and one of them is welding.
Nitrous is like a hot chick with an STD...You know you want to hit it...Your just afraid of the consequences
I dumped in some of that CRC emission pass and deleted the codes with my scanner, so far the CEL hasnt come on but it seems to just pop on when it feels like it. Sometimes as idle, sometimes while cruising on the freeway
same here bro and the cnc stuff seemed to not have any effects
ok got the same problem too...i jus swapped a jdm h23a in my 01 lude...i know timing is perfect cuz i put the belt on while the motor was still out but i know the plug wires r on the rite way...havent done a compression test yet but it only misfires when its warm...when i first start it theres no problems with misfire or anything...jus when it gets warmed up thats when it starts to run like crap...i have 2 brand new o2's o yea my vtec doesnt wrk either which i dont understand that also....someone plz try and help me out wit some suggestions
i just replaced my head gasket, crank sensor, spark plugs, fuel filter, cap and rotor, and my timing is adjusted. and im still getting the p0301,p0302,p0300 and a p1399 pending. what else can i do to fix this on a 98 dx with a mini me setup?
Getting a blinking CEL + lit ATTS light after running at a consistant RPM, be it idle or cruising.
Hate to revive this thread yet again, my 98 Prelude SH is throwing P0300, P0301, P0302, P0303, and P1399. My timing belt went out about 3 weeks ago, and damaged some valves. Did a head swap to a head with good valves, valves have been tuned, timing is in, just changed plugs, wires, cap, rotor, cleaned out the EGR itself and the EGR ports, still idling rough and making a poppoppoppoppoppop noise at the exhaust. As of this morning, she's also bitching when I start her up, just struggles for the first couple of cranks, then starts fine.
No loss of power from what I can tell, no loss of VTEC, but I haven't pushed to redline to see if I'm floating at 6800 or the typical 8100. Ideas on what to do next? I'm assuming check the injector connectors and the fuel rail.
When did this problem start? (Did you overrev with a misshift, etc.?)
Are the valves adjusted? Have you performed a compression check?
Is the timing adjusted?
What do the spark plugs look like?
Does the CEL blink only at low RPM or at all RPM?
Im having the same problem in cyl four...i misshifted and overreved. what could that mean?
2000 ek coupe:
D16Y8, Air box mod, cat delete
I know this thread is kinda old but im having the same problem kind of. Well long story short, i misshifted into 2nd from 3rd cause my clutch was worn out and overreved it. i slowed down and was like wtf so i did it again. As i got home the cel came on ive changed the spark plug first thinking that was it but nope wasnt the problem a yr and a half later i decided to get a rebuild since everything was due for service come to find out that i had to slightly bent valves so got everything fixed and the cel is still on. Its still reading cylinder misfire 1&2 and random misfire. and the car is running rich too. what ive done to try to solve this was spark plugs, plug wires, dizzy, rotor, cap, switch the fuel pressure regulator, adjust the valves, new o2, maps good, iacv good, no air leaks. swapped the injectors around and still getting the same code. timing good. any suggestion would be great. thanks
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