Jump to content
SAU Community

Recommended Posts

Hello all,

My 98 GTT is having issues and I am stuck . the issues surprisingly happened after I washed my car but I am not sure if that is the reason for the issues . Initially there was no cel car started up no problem but seemed to have a misfire at idle and wouldn’t rev above 2k (limp mode ?) . I tried cleaning the AFM and still same issues then the idle got worse and worse . Now the car won’t hold an idle / start and threw codes 12 (afm) 17(abs?) and 46 (tms) . I pulled the coil packs and spark plugs to try to see if they were the issue and car looked to be running rich (black) and the coils (splitfire) all had resistance between 1.5 and 1.6 and cleaned the afm AGAIN so I put back everything back and codes 12 and 17 are gone now but 46 is still there ?
 

how do I correct the code ? Could my issues be from water in the cat from the car wash ? My dumb self also pulled the TPS without marking it so could that also be an issue for starting it? spark plugs are fairly new yet they were black when I pulled them (all of them) 
 

I plan to pull the cat tomorrow to take a look to see if it is clogged. 

also replaced fuel filter 

Side note, my coupler from TB to J pipe is cracking . Will a 2.5 silicon coupler work as a replacement for this old oem one ? 

any insight is appreciated 

Link to comment
https://www.sau.com.au/forums/topic/485780-rb25det-neo-help/
Share on other sites

Make sure you set your TPS back to .46 volts with throttle closed and key in the on position (car off) then use multi metre and probe the positive up the back of your TPS plug, im not 100% sure which of the 3 wires is power on a NEO motor but on my S1 its the middle but just double check. 

as for the coupling in-between tb and j pipe, just take the old one off and take it with you to autobarn, supercheap whatever your go to is and match it up. Those places stock what you need :) 

Just now, MspecR33_ said:

Make sure you set your TPS back to .46 volts with throttle closed and key in the on position (car off) then use multi metre and probe the positive up the back of your TPS plug, im not 100% sure which of the 3 wires is power on a NEO motor but on my S1 its the middle but just double check. 

as for the coupling in-between tb and j pipe, just take the old one off and take it with you to autobarn, supercheap whatever your go to is and match it up. Those places stock what you need :) 

hold on i just realised you're in the USA not Australia hahah, so in that case take the coupling to any automotive parts store you guys have over there instead hahah

20 hours ago, AndyR34GTT said:

Thanks man ! I’ll calibrate the tps . This is the mechanical one though ? Same voltage right ?

Not sure what you mean by mechanical man but this is what im talking about, this is your TPS, and yeh 0.46V is what you’re after!

spacer.png

Mine doesn’t have two plugs . It’s a 1998 rb25det Neo. I didn’t touch that sensor I removed the one in the back which is the mechanical tps which is measured by the throttle / pedal . 

 

 

TPS I bought

8 hours ago, AndyR34GTT said:

Mine doesn’t have two plugs . It’s a 1998 rb25det Neo. I didn’t touch that sensor I removed the one in the back which is the mechanical tps which is measured by the throttle / pedal . 

 

 

TPS I bought

Yeh man what you bought is the TPS. Exactly what's circled in the picture I sent, non Neo's sometimes have 2 plugs but that doesn't change the procedure of setting the correct TPS voltage

Great to hear ! Thanks 🙏  waiting for my iacv gasket to get it back together and pray it starts. I’m worried it’s clogged injectors , cam angle sensor , or block is shot . I plan to do tests on all this need week . 

Problem solved 

 

Things I did , 

 

replaced fuel filter, tps sensor , air fuel meter , iacv gasket (had to since I removed it to clean it)

 

other things I did was removed spark plugs and cleaned , checked all coil packs and retighten down packs , cleaned iacv valve , hollowed out oem cat (looked super clogged), reset ecu , cleaned AFM apexi filter pod .

 

not sure what did it but I’m assuming it was either tps or air flow meter / dirty filter 

 

 

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

    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
Ă—
Ă—
  • Create New...