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05-04-2009
I just switched out my old coil packs and spark plug wires with brand new MSD ignition coil packs and spark plug wires, but now my engine is vibrating badly. Can anyone explain the wire and coil pack set up to me? I just think I went to fast on the swap out and mixed a couple of the wires. I need any info. from somebody thanks.
05-04-2009
what year is your car?
you might of got the wires mixed up, are any loose?
05-04-2009
Back 2 4 6
Front 1 3 5
05-04-2009
Hopefully it's just switched wires, but you downgraded your ignition system and wonder why it doesn't work right?
05-04-2009
If it is a GT he didn't. They were based off the F-body coils, which are teh GT's coil packs.
Waste of money? Yup, bit not a downgrade.
05-05-2009
I fixed the problem, the wires just were not pushed on tight enough. I went ahead and pulled them off the spark plug then reinserted them until I heard a click. My engine is running smooth now that I don't have the loose connections.
05-05-2009
If thats the case then wouldn't he have upgraded by running the stock GTP coils which can be had for way cheaper than MSD?Originally Posted by VinnieGTP
05-05-2009
I'll agree, the coils are a lateral move, but the wires are a downgrade.
05-05-2009
Is there actully proof GTP and GTs have different coil packs?
05-05-2009
Yes
05-05-2009
It would take some searching but yes. They are different part numbers and the spark output is higher on teh GTPs.
05-05-2009
Does anyone have hard data on this? Specs for certain part numbers listed? I keep seeing this thrown around but no one has the evidence. Only that the part numbers are different.
The coil pack bolts for a L36 are different from an L67. Doesn't make the L67 bolts any "better". Just means they more narrow by a half millimeter. So just because the part numbers are different does not mean the L67 coils put out more spark. Most manufacturers for coils use the same part number for both. Only ACDelco/Delphi use different part numbers and they're known for using a different number for the most minuscule difference in design.
05-08-2009
No one? That's kinda what I figured.
05-09-2009
I would have said something that would have got you goin' like always...but I didn't see this thread in time LMAO!!
05-09-2009
I just want to see the hard evidence instead of people assuming things. I've contacted coil pack manufacturers and even taken a few OEM coil packs apart and everything points to the L67 coils being no different from the L36 coils.
05-28-2009
i got onto autozones website and checked the part number for the GT and GtP C849 and its the same for both ..
05-28-2009
Has anyone checked them with a multimeter? You can calculate the voltage output based on the resistance ratio of the primary and secondary coil. for example if you have a primary (input) coil with a resistance of 100 ohms and a secondary of 1000 ohms and you apply 10 volts on the primary, the secondary would have 100 volts present.
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