| Author |
Message |
T Hollis
Samba Member
Joined: March 30, 2004
Posts: 227
Location: midwest
|
 Posted: Mon Apr 02, 2018 11:10 am Post subject: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
 |
|
What are acceptable "ohm" specs for the 12 volt BOSCH Blue Ignition Coil.
At the "4" readings below.
Primary - 200 & 2000
Secondary - 20,000 & 200,000
I'm thinking that the secondary windings in the BOSCH are shot.
200 -
2000 -
20,000 -
200,000 -
I'm getting.
BOSCH Blue Coil
200 - 3.3
2000 - 4
20,000 - 6.35
200,000 - 6.4
Delco Remy-Coil.
200 - 2.4
2000 - 4
20,000 - 10.60
200,000 - 10.30 |
|
| Back to top |
|
 |
mikedjames
Samba Member
Joined: July 02, 2012
Posts: 3265
Location: Hamble, Hampshire, UK
|
| Posted: Mon Apr 02, 2018 11:48 am Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
No , both coils have reasonable resistances.
However take a look at the surface of the nose of the coil for burning or tracking if spark over the surface.
It may also be flashing over internally. For instance if it got hot it may lose insulation or if some oil leaks out of the coil
The ohm meter is not an adequate complete test for an ignitiin coil. It tells you only that both your coils may be worth testing further.
_________________
Ancient vehicles and vessels
1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy |
|
| Back to top |
|
|
mikedjames
Samba Member
Joined: July 02, 2012
Posts: 3265
Location: Hamble, Hampshire, UK
|
| Posted: Mon Apr 02, 2018 11:53 am Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
No , both coils have reasonable resistances.
However take a look at the surface of the nose of the coil for burning or tracking if spark over the surface.
It may also be flashing over internally. For instance if it got hot it may lose insulation or if some oil leaks out of the coil the sparks may start jumping.
The ohm meter is not an adequate complete test for an ignition coil. It tells you only that both your coils may be worth testing further.
I have had burnt insulation on the nose of a coil , condenser going bad , electronic points wemulating burnt points and wires simply being loose on the coil.
As well as Taylor Spiro pro plug connectos springing off at 70mph before I knew how to put them on right.
_________________
Ancient vehicles and vessels
1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy |
|
| Back to top |
|
|
T Hollis
Samba Member
Joined: March 30, 2004
Posts: 227
Location: midwest
|
| Posted: Mon Apr 02, 2018 12:52 pm Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
| mikedjames wrote: |
No , both coils have reasonable resistances.
However take a look at the surface of the nose of the coil for burning or tracking if spark over the surface.
It may also be flashing over internally. For instance if it got hot it may lose insulation or if some oil leaks out of the coil
The ohm meter is not an adequate complete test for an ignitiin coil. It tells you only that both your coils may be worth testing further. |
I see no burning or tracking.
What other test needs to be done.
And, thanks for the reply! |
|
| Back to top |
|
|
Dale M.
Samba Member
Joined: April 12, 2006
Posts: 20770
Location: Just a tiny bit west of Yosemite Valley
|
| Posted: Mon Apr 02, 2018 1:05 pm Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
Always use reading in lowest scale of meter... It's most accurate...
As a rule "most" ignition coils are anywhere from about 0.5 to 5 ohms on primary and 7,000 to 15,000 on secondary....
In your case use the 200 scale on primary and 20k on secondary...
Dale
_________________
“Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...
Last edited by Dale M. on Mon Apr 02, 2018 1:18 pm; edited 4 times in total |
|
| Back to top |
|
|
T Hollis
Samba Member
Joined: March 30, 2004
Posts: 227
Location: midwest
|
| Posted: Mon Apr 02, 2018 1:08 pm Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
| Dale M. wrote: |
Always use reading in lowest scale of meter... It most accurate...
As a rule "most" ignition coils are anywhere from about 0.5 to 5 ohms on primary and 7,000 to 15,0000 on secondary....
Dale |
"Thanks" Dale, get pic. / info. as always! |
|
| Back to top |
|
|
Dale M.
Samba Member
Joined: April 12, 2006
Posts: 20770
Location: Just a tiny bit west of Yosemite Valley
|
| Posted: Mon Apr 02, 2018 1:12 pm Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
| Dale M. wrote: |
Always use reading in lowest scale of meter... It most accurate...
As a rule "most" ignition coils are anywhere from about 0.5 to 5 ohms on primary and 7,000 to 15,0000 on secondary....
In your case use the 200 scale on primary and 20k on secondary...
Dale |
OOPS one to many zeros in 15,000....
Dale
_________________
“Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
|
| Back to top |
|
|
T Hollis
Samba Member
Joined: March 30, 2004
Posts: 227
Location: midwest
|
| Posted: Mon Apr 02, 2018 1:20 pm Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
"Ah" what's another "0" its just a number....  |
|
| Back to top |
|
|
Dale M.
Samba Member
Joined: April 12, 2006
Posts: 20770
Location: Just a tiny bit west of Yosemite Valley
|
| Posted: Mon Apr 02, 2018 6:55 pm Post subject: Re: BOSCH Ignition Coil ohm specs @ 200-2000-20,000-200,000 |
|
|
In some circles it would be 150,000.....Not 15,000...
Dale
_________________
“Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
|
| Back to top |
|
|
|
