FI + Relocated coils + MSD wires = misfires?
07-30-2008, 03:02 AM
#1
Melting Slicks
Thread Starter
FI + Relocated coils + MSD wires = misfires?
I'm wondering if anyone had experienced misfires under load with relocated coils and the longer MSD wires. I fixed one wire twice and the misfire under load came back. Next step is to ohm test all the wires...
other then that no isue relocating
07-30-2008, 12:38 PM
#6
Safety Car
In my case, by the time it's noticeable, it's usually been visible on the wire or boot.
I'm sure my wires go through hell but I've run the same for over a year and no problems. I use the cheap Accell 9000 high-heat wires to get the right lengths before ordering a pre-cut set by Taylor and so far haven't had the need to replace them.
I'm sure my wires go through hell but I've run the same for over a year and no problems. I use the cheap Accell 9000 high-heat wires to get the right lengths before ordering a pre-cut set by Taylor and so far haven't had the need to replace them.
07-30-2008, 02:26 PM
#7
Racer
I reloacted the coils on a FI C6 and used the MSD plug wires. Same thing happened to me, ran fine for about 300 miles then started missing up top.
Turned out a plug boot wasn't on right and the spark was arcing to the head bolt. Poke your head under the hood and close far enough so the hood light goes out and have someone rev up the car. Should see the spark jump easily if its dark enough.
Turned out a plug boot wasn't on right and the spark was arcing to the head bolt. Poke your head under the hood and close far enough so the hood light goes out and have someone rev up the car. Should see the spark jump easily if its dark enough.
Last edited by Spritle; 07-30-2008 at 02:28 PM.
07-30-2008, 05:07 PM
#8
Melting Slicks
Thread Starter
Thanks, I'll take a look at that. I was hoping some neon light type tool existed to sense voltage leakage.
07-30-2008, 05:49 PM
#9
Team Owner
Made my own wires with MSD 8.8 wire and used the OEM boots. I'm also using the stock LS6 coils with no issues for thousands of miles.
Did have an RF issue though with the PCM which has since been resolved.
Did have an RF issue though with the PCM which has since been resolved.
07-30-2008, 08:51 PM
#11
Former Vendor
Member Since: Feb 2004
Location: Las Vegas NV
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St. Jude Donor '06 & '12
I've done numerous coil relocations with MSD wires, and heve never once had a failure.
Well, I take that back, I did have one failure. One customer had his battery leak acid all over his brand new, 2 day old wires, and they melted. So he blamed being a cheap azz on me and filed a CC dispute claiming he never got the relocation kit in the first place, cause I refused to GIVE him another set of wires for free.
Even though he was aware that his battery was faulty, but refused to replace it cause he didnt want to spend the money.
Other than that scum bag, I've never had a failure.
Well, I take that back, I did have one failure. One customer had his battery leak acid all over his brand new, 2 day old wires, and they melted. So he blamed being a cheap azz on me and filed a CC dispute claiming he never got the relocation kit in the first place, cause I refused to GIVE him another set of wires for free.
Even though he was aware that his battery was faulty, but refused to replace it cause he didnt want to spend the money.
Other than that scum bag, I've never had a failure.
07-30-2008, 09:44 PM
#13
Melting Slicks
I've done numerous coil relocations with MSD wires, and heve never once had a failure.
Well, I take that back, I did have one failure. One customer had his battery leak acid all over his brand new, 2 day old wires, and they melted. So he blamed being a cheap azz on me and filed a CC dispute claiming he never got the relocation kit in the first place, cause I refused to GIVE him another set of wires for free.
Even though he was aware that his battery was faulty, but refused to replace it cause he didnt want to spend the money.
Other than that scum bag, I've never had a failure.
Well, I take that back, I did have one failure. One customer had his battery leak acid all over his brand new, 2 day old wires, and they melted. So he blamed being a cheap azz on me and filed a CC dispute claiming he never got the relocation kit in the first place, cause I refused to GIVE him another set of wires for free.
Even though he was aware that his battery was faulty, but refused to replace it cause he didnt want to spend the money.
Other than that scum bag, I've never had a failure.
to that theory.
Negative ghost rider.
07-31-2008, 01:48 PM
#16
Melting Slicks
Thread Starter
Earlier I found a wire with a broken conductor, and it measured 140ohms. I remeasured all the wires, and they're 80-120ohms. The plugs are clean. The wire crimps are solid. The wires have no burn marks. The boots are clean except near 5 and 7 where it looks like I may have a small exhaust gasket leak (hmm, carbon). I saw a few youtube examples where windex was misted on the wires to find a spark. I waited until dark to try that, but it was too late to load up the motor in the neighborhood.
The car runs smooth at idle, cruise and part throttle. Only under load does something misfire, and the PCM seems to cut power back.
I think I'll temporarily strap the coils in the old location, one side at a time with the short wires, and road test. If power comes back I'll install half the long wires and narrow down which wire is bad.
08-01-2008, 12:13 AM
#17
Melting Slicks
Thread Starter
I waited until dark (9pm here) and covered the hood light (not gonna close the hood on my head). I mimicked the youtube windex test in the dark, and thick blue sparks jumped a half inch from the middle of the silicon spark plug boot to the exhaust header tube. Not something I want to put a finger near. Hard to believe at idle the spark would rather jump 1/2" to the header than across a .035" gap.
I think I need to order another plug boot, or find an high temp insulating sleeve.
