CEL P0351 Ignition Coil "A" Primary Control Circuit/Open - Page 25 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Dipstik-sportech · 08-10-2016, 12:05 PM

Just curious if anyone would be interested in an lq9 coil retrofit kit for our cars? It would mount them elsewhere to get them away from the heat by using a short plug wire. These coils are so strong using a wire would result in a negligible spark loss.

s0sl0w · 08-13-2016, 12:35 AM

Well I may as well add to this thread, OFT stage 1 93 Grimmspeed tune and ive been getting P0351 pretty consistently in the summer heat in 3rd 4th & 5th gear hard driving.

Has anyone had any luck with going to a heat range colder plug or is truly just a ambient heat issue thays killing the coils?

Deep Six · 08-13-2016, 08:45 AM

Quote:

Originally Posted by s0sl0w

Well I may as well add to this thread, OFT stage 1 93 Grimmspeed tune and ive been getting P0351 pretty consistently in the summer heat in 3rd 4th & 5th gear hard driving.

Has anyone had any luck with going to a heat range colder plug or is truly just a ambient heat issue thays killing the coils?

My thoughts are because #1 fails more often than the others combined it's the heat. Especially if the factory header and heat shield are removed.

I've only had one fail (#1) and I wrapped the replacement with heat tape and have had no issues since including several summer track days.

Kronos · 08-15-2016, 08:45 AM

I just had my first fail and I have the open flash header. No wrap. it's definitely from that plus my many spirited drives into the mountains.

Does anyone think an oil cooler will help prevent or slowdown these failures do to excessive heat?

Or maybe even E85 if you have a tune for it. I know E85 runs cooler. Just not sure if it's enough to make any difference.

Anyone have any other cooling ideas? I might get my header wrapped but I hear that accelerates the life of the header.

GsxrMe · 08-15-2016, 10:07 PM

Wrap you shit. I had unwrapped headers kill coils in the past in my Saturn SC2.

RichardsFRS · 08-16-2016, 07:04 AM

Only time I've got coil open error was in my Mustang after my dumbass sprayed the engine with a hose. There wasn't full contact but there wasn't no contact, so I got some dieletric grease and that fixed it.

df.dima · 09-14-2016, 12:01 AM

I got 0351 today 3rd gear. All stock, just axle-back, street driven, I only have 34k kms, so just under 22k miles - not impressed.
Code cleared after 3rd restart, as I was about to clear it with the scanner...

Felix7007 · 09-16-2016, 04:48 PM

Quote:

Originally Posted by F1point4

FYI there is a 652 part number now. I've been using a pair in my car for several thousand miles and a pair of track events. Wrapped mine in gold tape.

http://www.ft86club.com/forums/showp...0&postcount=78

Just wrapped my coils. We will see...

vgarcin · 10-12-2016, 03:34 AM

Wrapping the coils definitely helps.

As I track my car, I had repeated problems with those ignition coils and had to change them every 6 months.
However, I have wrapped those coils approx. a year ago; CEL did not come back. It seems it solves the problems, or at least decrease the frequency of failure.

ajc209 · 11-10-2016, 06:18 AM

Am I lucky? Cars done 13k miles and about 10 trackdays.

The first 5 trackdays were with a stock car, and a couple of those were hot days where oil hit around 140C.

No coil pack issue yet...

Icecreamtruk · 11-10-2016, 09:52 AM

Quote:

Originally Posted by ajc209

Am I lucky? Cars done 13k miles and about 10 trackdays.

The first 5 trackdays were with a stock car, and a couple of those were hot days where oil hit around 140C.

No coil pack issue yet...

I would say lucky or not as hot as you though it would be. If you have an unwrapped and uncoated header it makes it come on faster. I did around 10 track days with the car stock as well and never had one. Changed the whole exhaust system and did around 6 track days, and my first coilpack (A) poped. I changed it but didnt wrap them (my mistake) and it came back (same coilpack) after 4 more track days. Both times it poped was during very hot and humid days. I have since then wrapped them as best as I could without taking them out. If it pops again I`ll wrap it better with it out before putting it in (oh that phrase needs a context :P ).

kandiflippin · 11-27-2016, 04:15 PM

Just clarifying, it sounds like the best replacement for these is still OEM and then wrapping them? It doesnt sound like there has been a reliable replacement yet. Just got my first CEL for this after 2 seasons of autocross. Cars being built for STX but currently running header, ecutek, and running on 93 so nothing to crazy. The code was thrown when I was shifting from 2nd to 3rd at WOT.

Kronos · 11-27-2016, 05:49 PM

Has anyone on here replaced the coils themselves? The coil itself is only like $80 but the dealer estimated like $300-$400 for labor. They said they would need to lift the engine out to replace the coil since its a boxer and the area they needed to access is on the side.

Seems a bit extreme, can anyone verify this?

I'd rather just do it myself, but not if I need to lift the engine.

FT86RGV · 11-28-2016, 01:23 AM

Quote:

Originally Posted by Kronos

Has anyone on here replaced the coils themselves? The coil itself is only like $80 but the dealer estimated like $300-$400 for labor. They said they would need to lift the engine out to replace the coil since its a boxer and the area they needed to access is on the side.

Seems a bit extreme, can anyone verify this?

I'd rather just do it myself, but not if I need to lift the engine.

I've replaced them all without having to lift the engine. Just takes a lot of patience. There was a good diy posted earlier in the thread for the harder coil to get. You would follow similar steps for all of them.

edit: just found it. page 15

08-10-2016, 12:05 PM	#337
Dipstik-sportech Senior Member Join Date: Oct 2012 Drives: 2013 BRZ satin white pearl sportech Location: Thunder Bay Ontario Canada Posts: 1,813 Thanks: 842 Thanked 911 Times in 576 Posts Mentioned: 43 Post(s) Tagged: 0 Thread(s)	Just curious if anyone would be interested in an lq9 coil retrofit kit for our cars? It would mount them elsewhere to get them away from the heat by using a short plug wire. These coils are so strong using a wire would result in a negligible spark loss. __________________ 2013 SWP BRZ sportech. 11.11sec@129.01mph, 511whp on e70. FullBlown base kit, FullBlown built 9.5:1 engine, GTX3076R GEN2 turbo, 1700cc Bosch injectors, FullBlown flex fuel kit, FullBlown radiator and oil cooler, FullBlown custom 3" dual exit exhaust, act xtreme clutch, whiteline diff and subframe inserts, BC Racing coilovers, hotchkiss 18mm rear sway, is300 3.73 differential ... Never finished

08-15-2016, 08:45 AM	#340
Kronos Senior Member Join Date: May 2013 Drives: Asphalt FR-S MT Location: St. Louis MO Posts: 352 Thanks: 324 Thanked 126 Times in 82 Posts Mentioned: 5 Post(s) Tagged: 1 Thread(s)	CEL P0351 Ignition Coil "A" Primary Control Circuit/Open I just had my first fail and I have the open flash header. No wrap. it's definitely from that plus my many spirited drives into the mountains. Does anyone think an oil cooler will help prevent or slowdown these failures do to excessive heat? Or maybe even E85 if you have a tune for it. I know E85 runs cooler. Just not sure if it's enough to make any difference. Anyone have any other cooling ideas? I might get my header wrapped but I hear that accelerates the life of the header.

08-15-2016, 10:07 PM	#341
GsxrMe Senior Member Join Date: Jul 2015 Drives: Late 2014 Subaru BRZ Location: Cape Coral, FL Posts: 557 Thanks: 20 Thanked 183 Times in 139 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	Wrap you shit. I had unwrapped headers kill coils in the past in my Saturn SC2. __________________ 2014 Subaru BRZ FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe

08-16-2016, 07:04 AM	#342
RichardsFRS Senior Member Join Date: Dec 2015 Drives: 2013 Pearl White 6MT Location: Gainesville Ga Posts: 938 Thanks: 5 Thanked 356 Times in 246 Posts Mentioned: 13 Post(s) Tagged: 2 Thread(s)	Only time I've got coil open error was in my Mustang after my dumbass sprayed the engine with a hose. There wasn't full contact but there wasn't no contact, so I got some dieletric grease and that fixed it. __________________ Back from bancation in Banopolis where I laid on the beach with a beer between my legs. I at night and ate at sun rise

10-12-2016, 03:34 AM	#345
vgarcin Swiss Alps Driver Join Date: Sep 2013 Drives: Toyota gt86 Location: Geneva Posts: 79 Thanks: 0 Thanked 75 Times in 24 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Wrapping the coils definitely helps. As I track my car, I had repeated problems with those ignition coils and had to change them every 6 months. However, I have wrapped those coils approx. a year ago; CEL did not come back. It seems it solves the problems, or at least decrease the frequency of failure. __________________

08-13-2016, 12:35 AM	#338
s0sl0w Proud of Boxer Join Date: May 2013 Drives: 2013 BRZ Location: Maryland Posts: 501 Thanks: 176 Thanked 273 Times in 136 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Well I may as well add to this thread, OFT stage 1 93 Grimmspeed tune and ive been getting P0351 pretty consistently in the summer heat in 3rd 4th & 5th gear hard driving. Has anyone had any luck with going to a heat range colder plug or is truly just a ambient heat issue thays killing the coils?

09-14-2016, 12:01 AM	#343
df.dima Senior Member Join Date: May 2012 Drives: FR-S and Mazda 3 Sky Location: Kitchener, ON Posts: 341 Thanks: 10 Thanked 132 Times in 93 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I got 0351 today 3rd gear. All stock, just axle-back, street driven, I only have 34k kms, so just under 22k miles - not impressed. Code cleared after 3rd restart, as I was about to clear it with the scanner...

11-10-2016, 06:18 AM	#346
ajc209 Senior Member Join Date: Dec 2011 Drives: GT86 Cosworth Location: UK Posts: 753 Thanks: 361 Thanked 270 Times in 188 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	Am I lucky? Cars done 13k miles and about 10 trackdays. The first 5 trackdays were with a stock car, and a couple of those were hot days where oil hit around 140C. No coil pack issue yet...

11-27-2016, 05:49 PM	#349
Kronos Senior Member Join Date: May 2013 Drives: Asphalt FR-S MT Location: St. Louis MO Posts: 352 Thanks: 324 Thanked 126 Times in 82 Posts Mentioned: 5 Post(s) Tagged: 1 Thread(s)	CEL P0351 Ignition Coil "A" Primary Control Circuit/Open Has anyone on here replaced the coils themselves? The coil itself is only like $80 but the dealer estimated like $300-$400 for labor. They said they would need to lift the engine out to replace the coil since its a boxer and the area they needed to access is on the side. Seems a bit extreme, can anyone verify this? I'd rather just do it myself, but not if I need to lift the engine.

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