Individual Spark with cops, lost tach signal
11-12-2009, 10:39 PM
#1
Individual Spark with cops, lost tach signal
Please throw me a bone. I'm sure this has been discussed. I have not done a thorough search. It's been a long day. Work, gym, wiring individual spark with cops, and removing injector harness to prepare the wiring for sequential injection. I just came in from the garage.
I installed the COPs yesterday in batch fire, and I had a tach signal.
I wired the harness for individual spark, and now I don't have a tach signal at the dash. The car runs like a champ and the tunerstudio tach seems to work.
I also changed my tunerstudio spark setting from wasted spark to coil on plug.
I will continue to search in the meantime
I installed the COPs yesterday in batch fire, and I had a tach signal.
I wired the harness for individual spark, and now I don't have a tach signal at the dash. The car runs like a champ and the tunerstudio tach seems to work.
I also changed my tunerstudio spark setting from wasted spark to coil on plug.
I will continue to search in the meantime
Last edited by miatauser884; 11-12-2009 at 10:58 PM.
Reply
0
0
11-12-2009, 10:50 PM
#2
Supporting Vendor
iTrader: (33)
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,659
Total Cats: 134
You divided by zero. Fail.
Troubleshooting sucks. Pull tach signal from the tach output pin on the MS and win at life.
Not only does it add lenght and girth, but also saves mass because you can pull out the 5 extra ounces of wire and resistor from your cops harness that you no longer need. Adding lightness FTW
Troubleshooting sucks. Pull tach signal from the tach output pin on the MS and win at life.
Not only does it add lenght and girth, but also saves mass because you can pull out the 5 extra ounces of wire and resistor from your cops harness that you no longer need. Adding lightness FTW
Reply
0
0
11-12-2009, 11:08 PM
#5
I'll check my wiring. If I don't see anything obvious then I will use the tach output. It seems almost pointless at this point to have used the ignitor. I could have just wired everything straight from MS.
I swear I read a post recently that suggested wiring the tach signal wire to only one of the cops. I believe the reason was because that tach will get conflicting signals when run in individual spark mode if the tach signal wire is connected to all four cops. (Which is the case if they are running in wasted spark mode)
I swear I read a post recently that suggested wiring the tach signal wire to only one of the cops. I believe the reason was because that tach will get conflicting signals when run in individual spark mode if the tach signal wire is connected to all four cops. (Which is the case if they are running in wasted spark mode)
Last edited by miatauser884; 11-12-2009 at 11:37 PM.
Reply
0
0
11-13-2009, 12:39 AM
#6
Boost Pope
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,017
Total Cats: 6,587
The tach needs to see one pulse per ignition event. If you're connected only to one coil, and running full sequential, the tach will indicate 1/4 of actual RPM.
When running wasted spark, you need only connect to one of the two coils in each pair. In practice, it should make no difference if you go ahead and connect to all four of 'em.
When running wasted spark, you need only connect to one of the two coils in each pair. In practice, it should make no difference if you go ahead and connect to all four of 'em.
Reply
0
0
11-13-2009, 12:06 PM
#7
You divided by zero. Fail.
Troubleshooting sucks. Pull tach signal from the tach output pin on the MS and win at life.
Not only does it add lenght and girth, but also saves mass because you can pull out the 5 extra ounces of wire and resistor from your cops harness that you no longer need. Adding lightness FTW
Troubleshooting sucks. Pull tach signal from the tach output pin on the MS and win at life.
Not only does it add lenght and girth, but also saves mass because you can pull out the 5 extra ounces of wire and resistor from your cops harness that you no longer need. Adding lightness FTW
"1K resistor (Standalone ECU installs only - jump IG- to B+ in the diagnostics box if you have no tach in your gauge cluster)"
Or is this referring to no tach signal.
I did not use a 1k resistor. HAd tach with wasted spark, no tach with individual.
Reply
0
0
11-14-2009, 01:25 AM
#8
It appears that I fried one of my cops. Cyl number four. I'm pretty sure it happened when I was trying to start the car and I had the firing order mixed up. I thought I saw a little puff of smoke come from somewhere by the rear of the motor. Then I thought I was crazy.
Does turning the engine over with the firing order mixed up sound like something that could fry a cop? I want to make sure that I don't tear up another one.
On a positive note I got the sequential injection wired up and it ran the car on three cylinders.
Does turning the engine over with the firing order mixed up sound like something that could fry a cop? I want to make sure that I don't tear up another one.
On a positive note I got the sequential injection wired up and it ran the car on three cylinders.
Reply
0
0
11-14-2009, 01:42 PM
#9
Boost Pope
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,017
Total Cats: 6,587
Damn near impossible to kill one simply by having the order wrong. Now, if the output driving it were on all the time, that'd do it.
Reply
0
0
Thread
Thread Starter
Forum
Replies
Last Post
Zaphod
MEGAsquirt
47
10-26-2018 11:00 PM
