Last weekend I swapped an a2 into my EP. The only problem I had was an IACV CEL. About 3 days after the swap was complete the idle "cured" itself. The CEL remained on so I reset the ECU. The idle was good, no CELs so I drove it to work (friday).

Immediately after starting the car to drive home I get another CEL. I get off work at 12:30am so I couldn't do anything about it. I filled my tank at Shell and went home. Sunday I went to Autozone to get "the" CEL checked and it's throwing 10 codes: 2 for each cylinder misfiring and 2 "random cylinder misfires." The autozone guy said the usual: "when did you replace the plugs last?" But I know it's something more large scale than that.

The car has a major loss of power (feels like the k20a3) but idles good and the "misfires" aren't audible.

Any ideas guys?

 

Running 93 octane? Just a guess since that is the only thing you've done since the swap.

 

Yep, I have been using V-Power 2 tanks before the swap. That's what I thought it would be but shouldn't be. I also got a different muffler welded on but it's a wide open series magnaflow so I doubt it's causing the problem.

 

Have you done any further investigating? Have you pulled the plugs? Condition of the plugs? Don't just assume that they are good.

 

plugs and coil packs? ...

 

Yeah I checked the plugs and 1 was bad. I replaced it with the best one from my a3. I'll be getting 4 new plugs soon. The coil packs weren't melted or anything. How do I know they are good?

 

I'm not sure how you check the coil packs. I have the service manual and it was less than helpful. I would like to know as well. You can always ground the plug out of the head and visually check for spark to see if you have discrepancies between plugs/coil packs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WhiteOnRice &raquo;</TD></TR><TR><TD CLASS="quote">Yeah I checked the plugs and 1 was bad. I replaced it with the best one from my a3. I'll be getting 4 new plugs soon. The coil packs weren't melted or anything. How do I know they are good?</TD></TR></TABLE>

Do you have kpro? Also get new plugs NGK heat range 7 asap. The plugs that were in your a3 are range 6 and will heat up causing misfiring or detonation.

 

No kpro, it's running off the PRB ecu.

I'm only using 1 a3 plug. Would any auto parts store have those plugs? I can't find them on ebay.

 

Any major chain will have the necessary plugs. Good luck and let us know.

 

I found out one cylinder is running rich. Here's my thread: https://honda-tech.com/zerothread/2300254

Please help if you are knowledgeable in the area.