LS2 coil mis-fire (D514)
 

Hello guys back again with the misfire.

Ok, first off i bought the conversion harness on ebay, I also bought LS2 spark plug wires from Race Roots and also brand new D514 coils, New Ngk plugs.

My Car

2008 RX8
AP pulley
Ap full exhaust
MS intake
Cobb AP
ACT 6 Puck

So when i use my stock coils with the Ls2 wire the car runs fine and revs up all the way high. Then when I try using the Ls2 coil pack it miss fires and bogs alot between 2-3k RPM and slowly smooth out but revs are slow. I got some videos



I also tried adjusting the dwell, I got the tables from Team's post it helped a little but still bogs crazy and misfires.


Please help been trying to solve this problem for months:wallbash::wallbash:

are you sure Team's dwell was for the 514s? I thought the only tables we had posted were for the truck D585 coils.

Clearly this doesn't help, but why would you choose the D514s over the D585s?

I know it was for d585 dwell but i figured why not give it a try. Idk i made a dumb mistake. So i found out one coil was bad and not firing. I used a spark plug tester from orielys. I replaced it with a new spare. Now all coils are firing but still bogging i dont get it gahhh :(

What is the resistance rating on your wires? I don't know what the stock coils pull but the 514s are like 40mA and the 585s are some insanely high number in comparison like 120mA.

Perhaps there's too much resistance on the lines for there to be a good consistent signal. Stock wires would likely alleviate this if you're not already using them.... otherwise I dunno.

Ok give me like 15 mins imma pull out all the msd 8.5 wires out and measure the ohms

Ok wtf i barely had these msd spark plug wires for 4months

Two wires have no readings like blank on my multi meter.

The other two are 52.5 ohms and 66.5 ohms.

Would race roots replace them?

Attachment 226750

Attachment 226751

Ok couple pics of the two messed up wires :wallbash:

Damn, I would contact them directly. Send them these pictures and multimeter results.

Should i make a video on my results? and have brice look at this thread. hmm ill see if i can contact him on monday since tommorow is sunday.

Guess it depends on the warranty. You in the RGV?

Hopefully he does have warrenty. and yup still here in the rgv Mission,TX

Quick update. Made my own wires still no luck. So i used the spark plug tester and it works but when i give i it half throttle the spark cuts out.

Problem solved d514a pos coil packs i got from ebay. Now rolling on yukon d585 coils like a boss ;)