Jump to content
SAU Community

Recommended Posts

I am getting a missfire on my GTT RB25DET engine. I changed the plugs from the Iridiums I had previously gapped from 1.1mm to 0.8mm. I did not like the fact that I had regapped Iridiums so after having this problem I decided to swap in some 1.1mm BKRE7E-11, left them with the 1.1 gapping as well. Problem I have encountered is the famous bad idle and check light flashing at low rpm and having the TCS and SLIP lights on contstantly. I am going to pull the code today and see what is causing it, the coils look perfect no cracks as I inspected them thoroughly but maybe my eyes are deceiving me. I know the usual cause of a misfire is either coilpacks, gapping or in some cases timing. The car worked fine and has never been touched but I always had a slight miss ever since I got the car but in the last week I am getting a break up when in boost and around 5000-6000rpm. My question is are all Neo coilpacks the same, I don't want to run and buy Splitfires as I am removing the engine in a matter of months and I would prefer to get proper working replacements. I am wondering if I can get a set from an N/A RB20DE Neo or RB25DE Neo or will I have to get from an RB25DET Neo setup, does anyone know offhand?

Link to comment
https://www.sau.com.au/forums/topic/333482-neo-coilpacks/
Share on other sites

RB25DE Neo and RB25DET Neo coilpacks are exactly the same

Second that, in fact I've got a mix of these in my car now.

TriniGT if you have access to RB20DE Neo check if the coils have HANSHIN MCP-1440 written on them and look like the photo below. If yes they're exactly the same as RB25DE/T Neo coil packs.

I never had any visible damage to my coil packs, however some of the replacement ones I got (2nd hand OEM) were busted when I tested them for correct resistance.

Also have a read through my misfire thread here, it may give you some pointers. Mine is still getting a random stutter on idle, I am planning on re-checking vacuum hoses and cleaning the AAC next.

2360353540102364341S425x425Q85.jpg

Link to comment
https://www.sau.com.au/forums/topic/333482-neo-coilpacks/#findComment-5406295
Share on other sites

Also I checked the resistance on the primary side of my GTT coilpacks and I have found the culprit. Here are my readings,

Coilpack 1 - 1.686

Coilpack 2 - 1.683

Coilpack 3 - 1.546

Coilpack 4 -

Coilpack 5 - 1.581

Coilpack 6 - 1.671

My Part Number for these coils are MCP-1440 as stated earlier. I got a set off a Neo but not sure if it was an RB20 or 25 as they were off in a box, the part number is MCP-1340. Does anyone know if I can use them? Here is the primary side resistanc eon the five I got,

Coilpack 2 - 1.440

Coilpack 3 - 1.385

Coilpack 4 - 1.423

Coilpack 5 - 1.424

Coilpack 6 - 1.556

Now my next question is is the lower the resistance the better and the higher the resistance? Wondering if I can put it these five and the lowest resistance one from my bunch to make a set? Your thought?

Link to comment
https://www.sau.com.au/forums/topic/333482-neo-coilpacks/#findComment-5411168
Share on other sites

I have three different part numbers although I don't have the actual coils to see if they are in fact different:

ALL R34 neo

RB20DE 22433-AA000

RB25DE 22433-AA100

RB25DET 22433-AA101

Measuring resistance is not enough. You need to examine the coils and the surrounding areas to look for shorting or drive at night with tne coil cover and bonnet off (or may be able to see just be loading it up while parked). There are numerous threads on insulating the coils or just reducing the plug gap to .8mm.

Link to comment
https://www.sau.com.au/forums/topic/333482-neo-coilpacks/#findComment-5411179
Share on other sites

I don't see the need to regap the plugs, once you have proper spark it should be fine at stock boost. Any way, I got a replacement coilpack and swapped number four and refitted my setup, rechecked timing and started the car. CEL has gone so far but the TCS and SLIP lights are still there. Ran an ECU diagnostic and came up with 17 only this time so the coilpack so far has cured two symptoms. I decided to erase fault codes and start again, so far no codes are appearing, no TCS, SLIP or CEL light. My idle is a little lumpy at times but I am yet to drive her. Maybe with some driving it will clear up. I have since found some other stuff to do to her in the mean time before putting her back on the road; leaking upper rad hose and thrashed steering rack rubbers. Does it ever end.

Link to comment
https://www.sau.com.au/forums/topic/333482-neo-coilpacks/#findComment-5411447
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hi, is the HKS  Tower Bar still available ? negotiable ? 🤔
    • From there, it is really just test and assemble. Plug the adapter cables from the unit into the back of the screen, then the other side to the car harness. Don't forget all the other plugs too! Run the cables behind the unit and screw it back into place (4 screws) and you should now have 3 cables to run from the top screen to the android unit. I ran them along the DS of the other AV units in the gap between their backets and the console, and used some corrugated tubing on the sharp edges of the bracket so the wires were safe. Plug the centre console and lower screen in temporarily and turn the car to ACC, the AV should fire up as normal. Hold the back button for 3 sec and Android should appear on the top screen. You need to set the input to Aux for audio (more on that later). I put the unit under the AC duct in the centre console, with the wifi antenna on top of the AC duct near the shifter, the bluetooth antenna on the AC duct under the centre console The GPS unit on top of the DS to AC duct; they all seem to work OK there are are out of the way. Neat cable routing is a pain. For the drive recorder I mounted it near the rear view mirror and run the cable in the headlining, across the a pillar and then down the inside of the a pillar seal to the DS lower dash. From there it goes across and to one USB input for the unit. The second USB input is attached to the ECUtec OBD dongle and the 3rd goes to the USB bulkhead connected I added in the centre console. This is how the centre console looks "tidied" up Note I didn't install the provided speaker, didn't use the 2.5mm IPod in line or the piggyback loom for the Ipod or change any DIP switches; they seem to only be required if you need to use the Ipod input rather than the AUX input. That's it, install done, I'll follow up with a separate post on how the unit works, but in summary it retains all factory functions and inputs (so I still use my phone to the car for calls), reverse still works like factory etc.
    • Place the new daughterboard in the case and mount it using the 3 small black rivets provided, and reconnect the 3 factory ribbon cables to the new board Then, use the 3 piggyback cables from the daughterboard into the factory board on top (there are stand offs in the case to keep them apart. and remember to reconnect the antenna and rear cover fan wires. 1 screw to hold the motherboard in place. Before closing the case, make a hole in the sticker covering a hole in the case and run the cable for the android unit into the plug there. The video forgot this step, so did I, so will you probably. Then redo the 4 screws on back, 2 each top and bottom, 3 each side and put the 2 brackets back on.....all ready to go and not that tricky really.      
    • Onto the android unit. You need to remove the top screen because there is a daughterboard to put inside the case. Each side vent pops out from clips; start at the bottom and carefully remove upwards (use a trim remover tool to avoid breaking anything). Then the lower screen and controls come out, 4 screws, a couple of clips (including 3 flimsy ones at the top) and 3 plugs on the rear. Then the upper screen, 4 screws and a bunch of plugs and she is out. From there, remove the mounting brackets (2 screws each), 4 screws on the rear, 2 screws top and bottom and 3 screws holding in the small plates on each side. When you remove the back cover (tight fit), watch out for the power cable for the fan, I removed it so I could put the back aside. The mainboard is held in by 1 screw in the middle, 1 aerial at the top and 3 ribbon cables. If you've ever done any laptop stuff the ribbon cables are OK to work with, just pop up the retainer and they slide out. If you are not familiar just grab a 12 year old from an iphone factory, they will know how it works The case should now look like this:
    • Switching the console was tricky. First there were 6 screws to remove, and also the little adapter loom and its screws had to come out. Also don't forget to remove the 2 screws holding the central locking receiver. Then there are 4 clips on either side....these were very tight in this case and needed careful persuading with a long flat screw driver....some force required but not enough to break them...this was probably the fiddliest part of the whole job. In my case I needed both the wiring loom and the central locking receiver module to swap across to the new one. That was it for the console, so "assembly is the reverse of disassembly"
×
×
  • Create New...