Is it okay to put FR coilpacks inplace of RR ones. I am ordering RR coilpacks to replace 2 of the corroded RR ones. Already in hand two coilcover gaskets.
FR inplace of RR coilpacks
- Thread starter Jin1976
- Start date
I believe the plugs for the coil packs are on opposite sides. I know the RR coils have the plugs towards the front and facing the driver side. I THINK the FR coils have the plugs towards the rear and facings the driver side.
never tired this myself. dont see why not if the harness can reach or you can extend the harness to reach.
I believe there is a reason that they are labeled as such and why the p/n is different.
I'm sure having them on for a few miles does not result in catastrophic damage, but just put them back.
I'm sure having them on for a few miles does not result in catastrophic damage, but just put them back.
I'm ordering 3 pieces of RR coilpacks to replace the corroded ones. The place where I ordered from said one of his customer use the FR inplace of the RR ones and no problem observed. I insist on using the correct ones. I just want to know if it is okay to use the FR coilpacks.
the plug ins are facing the opposite way and the wiring is not long enough. i dont want to sound mean but why would you want to chance using the incorrect part on a $12k plus engine. especially something like ignition. you dont know if the impedence is different for the front bank to the rear....basically the front might pulse at a different rate than the rear. if so...you could lean a cylinder or cause too much fuel in essence burn out a catalytic converter. if you want to go cheap...call your closest Kragens or napa auto or even autozone and order the right ones. if you got a parts guy telling you that he knows a guy that knows a guy....bullshit. i know i guy who put chrome rims on a pinto but that doesnt make it ok 
dont take his word for it..especially when you motor is the thing at stake. do your baby a favor and get the right parts thanks for reading and i have no intentions of being mean.
bill
dont take his word for it..especially when you motor is the thing at stake. do your baby a favor and get the right parts thanks for reading and i have no intentions of being mean.bill
The physical arrangement of the coils are identical, front or rear. The front coil paks when installed are connector side down, on the rear they are installed connector side up. They will fit and operate in either location. This is true for the two pin or three pin coils. To this day I still do not know the difference, with the exception of the "FR" and "RR" marks.
HTH,
LarryB
.HTH,
LarryB
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For this reason I want to install the correct ones. I ask this question out of curiousity.
Thanks Larry. I did not know the connectors side are different front and rear. I will check with the old ones that I have replaced.
the plug ins are facing the opposite way and the wiring is not long enough. i dont want to sound mean but why would you want to chance using the incorrect part on a $12k plus engine. especially something like ignition. you dont know if the impedence is different for the front bank to the rear....basically the front might pulse at a different rate than the rear. if so...you could lean a cylinder or cause too much fuel in essence burn out a catalytic converter. if you want to go cheap...call your closest Kragens or napa auto or even autozone and order the right ones. if you got a parts guy telling you that he knows a guy that knows a guy....bullshit. i know i guy who put chrome rims on a pinto but that doesnt make it ok
bill
Thanks Larry. I did not know the connectors side are different front and rear. I will check with the old ones that I have replaced.
The physical arrangement of the coils are identical, front or rear. The front coil paks when installed are connector side down, on the rear they are installed connector side up. They will fit and operate in either location. This is true for the two pin or three pin coils. To this day I still do not know the difference, with the acception of the "FR" and "RR" marks
HTH,
LarryB
What Larry is saying is that they are IDENTICAL except for the lettering stamped on them. There is only a difference because the heads of the motor point outward from each other so they're pointing in the different directions but actually the same physically.
So I was wrong in thinking that they were opposite.
What Larry is saying is that they are IDENTICAL except for the lettering stamped on them. There is only a difference because the heads of the motor point outward from each other so they're pointing in the different directions but actually the same physically.
That is exactly what I meant, they are really the same
HTH,
LarryB
well... since a friend's NSX idle erractly with the FR in the back and the RR in the front, then i assumed they must be different. After they were installed in their right position, everything was fine.
with this i ask:
If their specs are the same, why did they worked bad??
with this i ask:
If their specs are the same, why did they worked bad??
I cannot explain this, but I have used them in ether position with no side effects at all.
Regards,
LarryB
That's what confused me... until i read this thread, i was sure that RR and FR couldn't be swapped....now i'm confused....not that it's my intention to swap them...but confuses me on my understanding of how everything works..
Thanks Larry,
Nuno
the internals are the same. the only difference between FR and RR are the lettering on the coilpacks and the way the male connector is positioned.
different part numbers only means that they are specific for one application, however if you really need to use RR for FR its ok. the wiring harness does not reach, you can make it work by extending the wiring harness and plugging it in.
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But Larry just said that they were the same.......
If you look at this drawing carefully you will see the connectors are on the SAME SIDE, POSITIONED THE SAME WAY FOR ALL COIL PAKS, FR or RR, they are just turned around when they are inserted in the valve cover. There is NO NEED to stretch harnesses, etc, just PUT THEM IN
. But, what do I know, I have only installed about 800 of these
.Regards,
LarryB
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But, what do I know, I have only installed about 800 of these
Larry, please don't get the idea that i was doubting your knowledge in anyway... but i'm sure you understand my doubts...
if the bad idle wasn't the coilpacks being swaped, what could had caused this?? the fact that everything was fine after they were installed in their right place is what confuses me the most...
Thanks,
Nuno
Hi Nuno,
That was not my point at all, and I do not take any offense to your comments.
I just want anyone reading to understand that there is no physical difference.
Regards,
LarryB
That was not my point at all, and I do not take any offense to your comments
.I just want anyone reading to understand that there is no physical difference.
Regards,
LarryB
Perhaps the first installation included user error. Such as an incorrectly plugged in harness. Or a faulty coil.
I recently replaced the plugs on my NSX. Ran great for three days. Then a CEL and rough idle. Went back and checked everything and found I didn't fully snap the connectors together on the middle coil of the rear bank. I don't know how I did that - but that plug wasn't firing.
Other than packaging differences I cannot imagine an engineering reason for the coil packs to be different for the front vs. rear. Has an engine ever used different spark plugs for different cylinders?
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