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R34 25gt Engine Light

neo1990

By neo1990,
in Engines & Forced Induction

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neo1990 Enthusiast

neo1990

Posted
Posted

Hi, my engine light came on last Saturday- thought could have Been a meter misread cause of the change in weather because it turned off when I restarted the car. 15 mins later it came back and unfrtunately hasn't left since.

Not feeling a difference in performance nor realising misfires. Oil levels fine so is coolant- car temp is always normal.

Called closest Nissan dealer to do a check as to what the issue is, they don't deal with r34 (even though it is still a Nissan) I live in sydneys inner west so if anyone knows a place to take it too that would be great or if anyone knows the issue that too would be appreciated

cheers

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peterw Community Regular

peterw

Posted
Posted

It'll most likely be the coilpacks, if the stock ones are still in there. Extremely common prob.

It will seem fine for a couple of weeks, then you'll notice a misfire and it'll get worse from there.

Get yourself a consult cable from here and you can confirm what the fault is. Fault code 21 = will be coilpacks. If you took it a dealership or mechanic, this is what they'd basically do - plug it in and see what fault code is on the computer.

There is another way to check by bridging the pins on the consult port (just search on here).

I got JJR ones for $399 delivered, and put new plugs in as well.

AYW550 Collaborator

AYW550

Posted
Posted
It'll most likely be the coilpacks, if the stock ones are still in there. Extremely common prob.

It will seem fine for a couple of weeks, then you'll notice a misfire and it'll get worse from there.

Get yourself a consult cable from here and you can confirm what the fault is. Fault code 21 = will be coilpacks. If you took it a dealership or mechanic, this is what they'd basically do - plug it in and see what fault code is on the computer.

There is another way to check by bridging the pins on the consult port (just search on here).

I got JJR ones for $399 delivered, and put new plugs in as well.

+1

i had the exact same problem, just a little light coming on once and a while, also thought it was just cos of damp weather, no noticable misfire at first either (stock exhaust does a good job of hiding the misfire)...took almost 2 years of slowly getting worse before it got very bad and car was nearly undriveable , , , bit the bullet and replaced all of my coils (and plugs just cos they were overdue) and the car has never been better since - turned out all 6 of my coils were infact blown

but there are also some interesting discussion that OEM replacement coils are better then aftermarket, (i replaced mine with aftermarket cos is cheaper) most people dog on the r34 coils really bad, but to be honest im pretty impressed that the OEM coils withstood almost 12 years of engine heat before packing in, ill be happy if my aftermarket ones last half that long!

Damo_R34 Grand Master

Damo_R34

Posted
Posted

The R34 factory coilpacks are fine to use in your engine, however new coilpacks are up around the $1200 mark new from Nissan.

JJR $399

Splitfire $499~

Nissan OEM $1200

So why would you buy Nissan ones :P and dont just buy 2nd hand "working" replacements, theyll only suffer the same fate of the last ones, if you put brand new coils in, they will last much longer.

  • 1 year later...
bra0063 Collaborator

bra0063

Posted
Posted

hi my car also has that idle problem but its only just starting to do it ie once every 2 weeks

would a mechanic be able to detect the problem even if its not misfiring "at the time its getting serviced"

because my dad doesnt want me to jump to conclusions buying a new set of coilpacks and wants me to take it to nissan or nismo in thomastown :(

cheers :D

and would new coils at any performance because unfortunatly im on my p's so performance hungry lol XD

  • 3 weeks later...
  • 10 months later...
Pr0x1mity Proficient

Pr0x1mity

Posted
Posted

Ughhhh! I've had this problem for a while now.

Basically I had a faulty coil, then another one.. I have changed the coils (all of them) to Yellow jackets.

Still having problems.. What else could it be?! Coil loom? what else is there that could be causing it? Injectors?

P.S I've changed the spark plugs..

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