Upgrading to Coil on Plugs (all years) COP writeup
11-14-2014, 11:31 AM
#23
Elite Member
iTrader: (37)
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
I've had 3 NB1 harnesses apart, both ignition/injection and ECU side and I can tell you with pretty solid certainty that there is no cap in the stock harness for 99/00. I also have a pair of NB2 ignition/injection harness and again, no cap. I've also got a complete 04 MSM harness in the garage (literally every wire in the car) and no caps in there either.
I'm not calling you a liar, I'm just saying from my personal experience I've not seen any caps. I'd love someone to prove me wrong.
I'm not calling you a liar, I'm just saying from my personal experience I've not seen any caps. I'd love someone to prove me wrong.
Reply
0
0
11-14-2014, 06:06 PM
#25
Elite Member
iTrader: (37)
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
Is it actually a cap? It looks to small to be of any use for power drop, but I could see it as some sort of filter to keep ignition noise out of the rest of the harness.
Reply
0
0
mine disappeared.
11-23-2014, 02:18 PM
#34
Can you all check my work for me, putting LS2 coils on a 1.6 DIYPNP.
Going to move ECU 2I to the MS Tach out, then splicing white/black at the igniter to the yellow/blue tach wire. If I'm not mistaken, this will drive the tach off the MS without having to run any extra wire. I'm curious if the tach will be more accurate this way, but it's probably the tach itself that makes it inaccurate, right? Either way, if you butcher a igniter to make a PNP solution this should work and be easily reversible.
Then, it's as easy as wiring in batch just like COPS. Reading has lead me to believe it's safe to wire all the coil grounds together. Is it true the signal ground of the coils is for misfire detection only? I guess you could easily use some of the evap purge valve wiring as a new signal ground, but is it worth the trouble, and hacking?
I plan on adding capacitors as documented on the first page, a large cap on the voltage to the coils, and two smaller capacitors on the trigger wires. The wiring diagram I have for my 1.6 does show a capacitor in the mix, and I already have them around so I've nothing to loose.
Here's what I came up with to hold the things in the stock location. At an angle, because the 45deg boot ends are cheapest and I've got more clearance for a reroute if I ever get around to it.
Going to move ECU 2I to the MS Tach out, then splicing white/black at the igniter to the yellow/blue tach wire. If I'm not mistaken, this will drive the tach off the MS without having to run any extra wire. I'm curious if the tach will be more accurate this way, but it's probably the tach itself that makes it inaccurate, right? Either way, if you butcher a igniter to make a PNP solution this should work and be easily reversible.
Then, it's as easy as wiring in batch just like COPS. Reading has lead me to believe it's safe to wire all the coil grounds together. Is it true the signal ground of the coils is for misfire detection only? I guess you could easily use some of the evap purge valve wiring as a new signal ground, but is it worth the trouble, and hacking?
I plan on adding capacitors as documented on the first page, a large cap on the voltage to the coils, and two smaller capacitors on the trigger wires. The wiring diagram I have for my 1.6 does show a capacitor in the mix, and I already have them around so I've nothing to loose.
Here's what I came up with to hold the things in the stock location. At an angle, because the 45deg boot ends are cheapest and I've got more clearance for a reroute if I ever get around to it.
Reply
0
0
11-27-2014, 07:01 AM
#35
SADFab Destructive Testing Engineer
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Can you all check my work for me, putting LS2 coils on a 1.6 DIYPNP.
Going to move ECU 2I to the MS Tach out, then splicing white/black at the igniter to the yellow/blue tach wire. If I'm not mistaken, this will drive the tach off the MS without having to run any extra wire. I'm curious if the tach will be more accurate this way, but it's probably the tach itself that makes it inaccurate, right? Either way, if you butcher a igniter to make a PNP solution this should work and be easily reversible.
Then, it's as easy as wiring in batch just like COPS. Reading has lead me to believe it's safe to wire all the coil grounds together. Is it true the signal ground of the coils is for misfire detection only? I guess you could easily use some of the evap purge valve wiring as a new signal ground, but is it worth the trouble, and hacking?
I plan on adding capacitors as documented on the first page, a large cap on the voltage to the coils, and two smaller capacitors on the trigger wires. The wiring diagram I have for my 1.6 does show a capacitor in the mix, and I already have them around so I've nothing to loose.
Here's what I came up with to hold the things in the stock location. At an angle, because the 45deg boot ends are cheapest and I've got more clearance for a reroute if I ever get around to it.
Going to move ECU 2I to the MS Tach out, then splicing white/black at the igniter to the yellow/blue tach wire. If I'm not mistaken, this will drive the tach off the MS without having to run any extra wire. I'm curious if the tach will be more accurate this way, but it's probably the tach itself that makes it inaccurate, right? Either way, if you butcher a igniter to make a PNP solution this should work and be easily reversible.
Then, it's as easy as wiring in batch just like COPS. Reading has lead me to believe it's safe to wire all the coil grounds together. Is it true the signal ground of the coils is for misfire detection only? I guess you could easily use some of the evap purge valve wiring as a new signal ground, but is it worth the trouble, and hacking?
I plan on adding capacitors as documented on the first page, a large cap on the voltage to the coils, and two smaller capacitors on the trigger wires. The wiring diagram I have for my 1.6 does show a capacitor in the mix, and I already have them around so I've nothing to loose.
Here's what I came up with to hold the things in the stock location. At an angle, because the 45deg boot ends are cheapest and I've got more clearance for a reroute if I ever get around to it.
Reply
0
0
11-27-2014, 08:44 AM
#36
Moderator
iTrader: (12)
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 20,660
Total Cats: 3,011
The grounds and the signal grounds were paired together. The giant capacitor was the only odd thing that was added to the harness. I'm using a MS1 in wasted spark configuration. I use the stock wires but used the Taylor ends from Summit Racing on the coil side and shortened the high tension leads to match my needs.
I need to take pics of the finished product.
Reply
0
0
11-27-2014, 05:22 PM
#38
SADFab Destructive Testing Engineer
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
I was reading over some wiring diagrams and that make sense. 96-97 (and maybe 94-95 but I don't remember) already have a Tach out pin on the ECU. But the 90-93 tach is connected straight to the coils.
EDIT: Just checked. 94-95 has tach out too.
EDIT: Just checked. 94-95 has tach out too.
Reply
0
0
11-27-2014, 05:30 PM
#40
SADFab Destructive Testing Engineer
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Reply
0
0
