14 replies to this topic

[volflo]

Everything worked fine. Big intercooler was mounted. and my new 19T spool like a luni.
running at 20 psi i thought a nice coil would be a good idea to support my Magnecor KV85.
so i took a MSD Blaster SS (PN 8207).
But under full boost one cylinder would not detonate. that only happenend exceeding 15-16 psi.
so i hooked up the oem coil again and took the orig connection from coil to cap.
Voila. Everything fine again.

Anybody have an idea?
Maybe the connection from MSD coil to cap is no working i.e. the new plug was only clamped (not soldered) or even ordered at Magnecor.
But if that "bottleneck" connection was the reason would i also face problems that only one cyl is not firing under full boost?

Apart from that engine ran fine.

Thanks all.

Edited by volflo, 25 October 2004 - 02:33 PM.

[Johann]

Everything worked fine. Big IC was mounted. and  my new 19T spool like a luni.
running at 20 psi i thought a nice coil would be a good idea to support my Magnecor KV85.
so i took a MSD Blaster SS (PN 8207).
But under full boost one cylinder would not detonate. that only happenend exceeding 15-16 psi.
so i hooked up the oem coil again and took the orig connection from coil to cap.
Voila. Everything fine again.

Anybody have an idea?
Maybe the connection from MSD coil to cap is no working i.e. the new plug was only clamped (not soldered) or even ordered at Magnecor.
But if that "bottleneck" connection was the reason would i also face problems that only one cyl is not firing under full boost?

Apart from that engine ran fine.

Thanks all.

How about grounding?

I use the same setup SSS coil and Magnecor 8.5 mm wires without problems. This using stock Volvo turbo plugs.
One other point to check are the distributer cap and rotor.

[volflo]

Maybe you got a defective coil?

it was cheap form ebay. i paid less than 50 USD.
but it was quite a beig dealer and had excellent reputaion ("ernmar" or something like that)
How would i possibly know if its broken?

[volflo]

@Johann: i really dont know your "grounding standards". ;-)
But i used the stock connections. What will i have to fulfill/ take care of with the mounting of the the actual block /coil itself?

i mean i didnt solder it on a copper plate on the battery minus.....;-)

cap, rotor is NEW. right now i have those bosch MR Sweden sells with their BSR-chips. But i have a set of Volvo-Coppers (new, unused)

[JHEIII874T5M]

I'm thinking along the same lines Doug is... bad coil

[volflo]

so the only clamped connection of the Magnecor wire to the coil is probably not the answer. that was my guess.
how will i be able to check if its the coil?

[JHEIII874T5M]

so the only clamped connection of the Magnecor wire to the coil is probably not the answer. that was my guess.
how will i be able to check if its the coil?

put it on another car (only takes about 5-10 mins, as you know) also the fact that you put the other one on and the car was fine, leads me to believe it's the MSD unit

[volflo]

so the only clamped connection of the Magnecor wire to the coil is probably not the answer. that was my guess.
how will i be able to check if its the coil?

put it on another car (only takes about 5-10 mins, as you know) also the fact that you put the other one on and the car was fine, leads me to believe it's the MSD unit

..or the connection from coil to cap.
remember i had to use the the stock connection again because the msd connection is different from the oem coil's plug.....

[larryo108]

Volflo:

I was having the same problem when running an Accel coil. I put the stock back in and everything was peachy. I even had another Accel coil to put in with my custom Magnecor lead and found it was the coil. With the second Accel coil and the custom Magnecor everything was peachy. Check my recent Accel coil thread for all of the details.

[kenhoeve]

you can use a multimeter to check the resistivity of the coil if you can get the spec.

[volflo]

Volflo:

I was having the same problem when running an Accel coil. I put the stock back in and everything was peachy. I even had another Accel coil to put in with my custom Magnecor lead and found it was the coil. With the second Accel coil and the custom Magnecor everything was peachy. Check my recent Accel coil thread for all of the details.

thanks, larry. very nice of you.
(especially after all the mess with the dual gauge pod. )

honestly, i thought they wouldnt fail. Esp. when new....
But it seems you have had the very same probs as i had. A friend (hes been working with tons of different coils, plugs, etc on his waterskiing boats) told me that its very unlikely a bad connection from coil to the "center" Magnecor wire. it would "fire thru that even at half an inch of gap" as he said.
Can we really exlcude its my connection?

[larryo108]

Hey man:

Don't even worry about the dual gauge pod. I have a three gauge pod now. Anyways, I never followed up on it. Wasn't your fault. Based on my experience I would say it was the coil and not the lead. I think the Magnecor stuff is very good. Can you try another coil with your custom wire on your car? That would tell you for sure. Either way, I think I would suspect the coil first.

[Johann]

@Johann: i really dont know your "grounding standards". ;-)
But i used the stock connections. What will i have to fulfill/ take care of with the mounting of the the actual block /coil itself?

What I meant was that the SS coil comes with rubber connection "feet" probably to isolate the coil.

[volflo]

@Johann: i really dont know your "grounding standards". ;-)
But i used the stock connections. What will i have to fulfill/ take care of with the mounting of the the actual block /coil itself?

What I meant was that the SS coil comes with rubber connection "feet" probably to isolate the coil.

..oc course those are installed. Maybe the housing/isolation of the coil has a tiny crack somewhere and then gets grounded?
darn i cant run next to my car on full boost in darkness opening the hood and look where the sparks go.
I could also test if the sparks are long and blue or short and more yellow.(voltage vs. current).
I Dont really know what a multimeter is or where i could get hold of one. Can my Volvo dealer measure that?