Jorge68

So my car has been hesitating very badly lately and when I checked the codes this is what I got. I know that they are cylinder misfires, so I did the obvious, changed the spark plugs (NGK Iridiums) changed the coil packs of SOME of the cylinders (things are expensive) and I changed the o2 sensor (from discount, not Acura) What else can it be!?

PenancE

hmmmm seemed like u changed everything related to the misfire, with the coilpacks, keep switching one out with a good one and find out which one is it, exactly how many packs u change?

Jorge68

Here's what made the check engine light turn on..

fsttyms1

Ok the 02 sensor may still be the problem. Lots of the non acura ones require them to be bought in pairs. Also as some members have found out, lots of the aftermarket 02 sensors dont last long.

Beyond that, maybe its time to bring it in and let the dealers computer and techs figure it out?

Jorge68

I'm thinkign of taking the risk and just going and buying the OEM o2 sensor...what do you guys think?

fsttyms1

??

So are you getting all those misfire codes, or just the one in the pic you posted?

Jorge68

All of them, but the cylinder number 3 mifire is the one that caused the check engine light to turn on.

fsttyms1

Humm have you tried switching coil packs around (like take #3 and put it on #6) and reset teh computer and see if #6 gets the code

Jorge68

I guess it's time to take it to the dealship and see what they say...I'm sooooo fucking pissed ggrrgrg!! lol

smx95

From that freeze frame, you don't drive the car normal.

I would get a spark plug tester, test each coil pack for spark and indeed for good strong spark. Coil packs give a very good spark due to the higher output of voltage. If you see spark you can eliminate the Harness, ECU and coils. Check the gap on each plug, if look like shit replace as needed and get correct gap specs unless its a platinum plug.

Next I would test each injector. Simple way to see if you have a fuel related issuse here, is run a small bottle of propane gas into the intake system while the car is running. If the engine runs smoother than you know its a fuel related issuse.

Compression test can test the condition of any spec. cylinder. This can provide some information if its an internal issuse of the cylinder not holding combustion. It can also be a burnt valve. Leak down compression test would let you know this. But before I jump to anything internal related do the basics. Don't keep throwing parts intill its fixed you are just waisting time and money.


Next not to say anything bad to anyone, Acura techs wouldn't know how to go further with this problem. Infact 90% of techs in any dealership are just a bunch of new kids off the school block that don't know how to read or use a scan tool. A scan tool is only as good to lead you into some direction from there you are off to use your hands on knowledge to fix the car.

Possible reasons ive seen for a misfire AND NOT AN O2 sensor.

-Injectors weak, or not working
-Coil packs bad
-Wire harness problem
-ECU problem
-Wrong plugs (heat index, gap spec)
-Crank, Cam position sensors
-Bad fuel in the gas tank
-Bad fuel filter or clogged
-Any secondary ignition setup, which may include wrong resistance in between ignition coils.
-Bad MAF sensor

These are some common problems. With the information Ive provided you should get your hands dirty and save some money before bring it to a dealer and letting them rip apart everything not knowing what their doing. It's your car and you bought it, last thing you want is a noobie tech working on it.

smx95

Oh forgot to mention, P1399 is a spec HONDA/ACURA DTC

As stupid as it may sound it can also be a Idle control valve or control unit. A car I just recently worked on had random misfire. The CEL only set a Cylinder #1 misfire. Under pending codes it had a P1399 code. Reset everything after a simple ignition tune, Still had a misfire and under pending codes was a Idle control valve malfunction. The misfire was less noticable after a simple tune. P1399 for me seems to be a random honda DTC misfire. Again good luck to you, keep us all posted.

dvsxlt247

RICK CASE ACURA BOY!!! Thats where im at as we speak. Excellent service and good coffee from what my parents said lol. JORGE, COME ON DOWNNNNN!!!! lol.

ajrg@sbcglobal.net

I would highly appreciate if you can let me know, what software and the connector you use to connect to car system as show in the diagram.

Can you Please email me @ ajrg@sbcglobal.net
Thank You