R34 GTR ECU removal

[amrithd27]

hey guys 

just wondering if anyone knows how to remove the stud bolt things to replace the stock r34 gtr ecu with an apexi power fc??

cheers

[r32-25t]

It doesn’t come out just unwind it and pull the plug out 

[amrithd27]

when you say unwind it which bit do you mean? cause i pulled out the bolt at the top near the carpet and it won't budge at all... I've put in some pictures to show you my dilemma  

[KiwiRS4T]

Haven't got a car to look at just now but I think you need to pull up the plate at the bottom of the door and pull the door rubber back to remove the trim to get at the ecu and there are a total of 2 or 3 I think nuts to remove. Then undo the 10mm bolt in the middle of the plug and pull the plug out and then remove the ecu.

[r32-25t]

Sorry I thought you meant bolt on the plug 

[kimbod]

That looks like someone has done that so it can't be removed.

[Dose Pipe Sutututu]

why would you want a PowerFC in a GT-R, get something modern/better

[GTSBoy]

33 minutes ago, kimbod said:

That looks like someone has done that so it can't be removed.

Yup.  Looks like the nuts have been ground down in some weird arsed way.  Your best approach would be brute force and violence.

13 minutes ago, Dose Pipe Sutututu said:

why would you want a PowerFC in a GT-R, get something modern/better

I'm with him.  PFC is a f**king terrible idea in 2018.  Was a terrible idea in 2008!

[Sick_R31]

It looks like someone has used shear bolts. You can and undo them with some vice grips or if that doesn't work, drill the heads off them.

[iruvyouskyrine]

Car is no good if the ECU can't be taken out, will give you $20k for it as is.

[admS15]

Jackhammer, best tool for the job. Maybe not but sounds cool.

[No Crust Racing]

I did this job in my 34R, yours has been modified incorrectly - As those should be 10mm bolts. 

You will need to brute force those pop rivets/shear bolts? as gently as you can to not damage the underlying bracket. 

As mentioned, it would be much better to use something newer. I had decent results with Haltech plug in, but there's lots of options. Ideally something that removes the AFMs if possible. 

If that's not an option, choose your tuner carefully as PFC+AFM has been known to result in various drivability issues. Ideally only use it for lower power goal.

Good luck.

 

 

[r32-25t]

There’s a few ways to get them out,

you can cut a slit through the middle and use a screw driver,

you can file 2 flats either side of the head and use vice grips to turn them 

or you can use a center punch and hammer to turn them 

[GTSBoy]

1 hour ago, r32-25t said:

There’s a few ways to get them out,

you can cut a slit through the middle and use a screw driver,

you can file 2 flats either side of the head and use vice grips to turn them 

or you can use a center punch and hammer to turn them 

18V angle grinder and just remove the bits that annoy you!

[amrithd27]

4 hours ago, Dose Pipe Sutututu said:

why would you want a PowerFC in a GT-R, get something modern/better

just wanted something cheap to try stop it from running ridiculously rich on 98... currently get maybe 185ks out of a tank

 

3 hours ago, iruvyouskyrine said:

Car is no good if the ECU can't be taken out, will give you $20k for it as is.

ahaha two hours ago when i was still struggling to get it out i would have accepted that 

1 hour ago, ActionDan said:

I did this job in my 34R, yours has been modified incorrectly - As those should be 10mm bolts. 

You will need to brute force those pop rivets/shear bolts? as gently as you can to not damage the underlying bracket. 

As mentioned, it would be much better to use something newer. I had decent results with Haltech plug in, but there's lots of options. Ideally something that removes the AFMs if possible. 

If that's not an option, choose your tuner carefully as PFC+AFM has been known to result in various drivability issues. Ideally only use it for lower power goal.

Good luck.

 

 

i live in perth any recommendations for a good tuner? i don't really have a power goal in mind i just want it to run smoothly on 98 and reduce the black soot on my poor white car

 

1 hour ago, r32-25t said:

There’s a few ways to get them out,

you can cut a slit through the middle and use a screw driver,

you can file 2 flats either side of the head and use vice grips to turn them 

or you can use a center punch and hammer to turn them 

Vice grips were the way to go, could slit it wide enough to crack the loctite

[amrithd27]

5 minutes ago, GTSBoy said:

18V angle grinder and just remove the bits that annoy you!

knowing my luck my hand would have slipped and cut through the harness 

[Dose Pipe Sutututu]

10 minutes ago, amrithd27 said:

just wanted something cheap to try stop it from running ridiculously rich on 98... currently get maybe 185ks out of a tank 

Sounds like a problem that could be either:

• Faulty AFMs
• Wrong Injectors installed
• Stock O2s are rooted

 

[r32-25t]

that sounds pretty normal for an untuned gtr

[amrithd27]

2 hours ago, Dose Pipe Sutututu said:

Sounds like a problem that could be either:

• Faulty AFMs
• Wrong Injectors installed
• Stock O2s are rooted

 

changed the O2 sensors when i first got the car but didn't bother about the injectors just assumed their stock

[Dose Pipe Sutututu]

3 hours ago, r32-25t said:

that sounds pretty normal for an untuned gtr

A bit too high, I drove a dead stock R34 GT-R around Japan and managed about 300km ish driving like a knob.