Maxima Forums - View Single Post - Power Surging During Acceleration (~3000-4500rpm)

rx7racr · 08-04-2008, 08:58 PM

UPDATE 8/4:

Having gotten pretty excited about the talk of electrical tape being able to fix this problem, I tried it out - - but only on the front bank (cyl 2, 4 and 6), as I didn't have a lot of time:

I wrapped the heck out of all 3 coils... I also measured their primary circuits again - this time when the coils were hot - - all three showed significantly higher resistance than when cold (nearly 2000 ohms hot, vs. around 1500 ohms cold). I also verified the sparkplug brand. I knew I'd installed them about 1.5yrs ago, but I couldn't remember what kind I used - - turns out I was smart and used NGKs...

Anyway - long story short, I went for a drive with the #2,4 and 6 coils all wrapped up in electrical tape, and I didn't notice any difference - the surging / power-loss persisted...

This still means either:

A.) The coils could be experiencing a failure mode other than arcing to the sides of the sparkplug recesses

B.) I didn't use enough tape, and the arcing persists

C.) the problem is with coils 1,3 or 5 (that I didn't tape today)

or

D.) My problem is something other than coilpacks...

I'll probably try taping the rear bank of coils in the next few days, and I'll report back with the findings...

Thanks everyone for the continued help!

08-04-2008, 08:58 PM	#33
rx7racr Member Join Date: Jan 2004 iTrader: (0) Posts: 74	UPDATE 8/4: Having gotten pretty excited about the talk of electrical tape being able to fix this problem, I tried it out - - but only on the front bank (cyl 2, 4 and 6), as I didn't have a lot of time: I wrapped the heck out of all 3 coils... I also measured their primary circuits again - this time when the coils were hot - - all three showed significantly higher resistance than when cold (nearly 2000 ohms hot, vs. around 1500 ohms cold). I also verified the sparkplug brand. I knew I'd installed them about 1.5yrs ago, but I couldn't remember what kind I used - - turns out I was smart and used NGKs... Anyway - long story short, I went for a drive with the #2,4 and 6 coils all wrapped up in electrical tape, and I didn't notice any difference - the surging / power-loss persisted... This still means either: A.) The coils could be experiencing a failure mode other than arcing to the sides of the sparkplug recesses B.) I didn't use enough tape, and the arcing persists C.) the problem is with coils 1,3 or 5 (that I didn't tape today) or D.) My problem is something other than coilpacks... I'll probably try taping the rear bank of coils in the next few days, and I'll report back with the findings... Thanks everyone for the continued help!