hit 70k and the problems have started

Place for discussions about the RX-8
User avatar
feedthegoatxi
Former Member
Former Member
Posts: 110
Joined: Tue Dec 01, 2015 8:21 am
RX-8: 40th Anniversary
Colour: Metropolitan Grey
Location: Stockport
Has thanked: 12 times
Been thanked: 4 times

hit 70k and the problems have started

Post by feedthegoatxi »

i was putting my car away yesterday and thought I'd give it one last beep before going into storage for 8 months... there was a huge hesitancy when i hit 4-5k rpm and lots of loud noises coming from the rear end, felt like there was no power, i didn't notice any smoke and I'm running decat. below 4k seemed normal.

got to the storage place and plugged in an OBD scanner thing to see if there was anything logged - nothing, then when i went to start the car the rev counter was jumping between 0 and 1k several times and the oil pressure gauge went low briefly and then jumped back again to it's normal position... never known my gauges do anything like this before.

any ideas what i might be looking at, 8 months of worry and saving up ahead of me :( will probably book into RR in spring but not sure if i should even consider driving it there.

any input much appreciated as ever.
User avatar
warpc0il
Spin Doctor
Spin Doctor
Posts: 32583
Joined: Sat Sep 06, 2008 10:56 pm
RX-8: 231
Colour: Lightning Yellow
Location: Groomsport, Co Down, NI
Has thanked: 442 times
Been thanked: 2087 times

Re: hit 70k and the problems have started

Post by warpc0il »

Check battery connections and main body earth

Sent from my Samsung using Tapatalk

These users thanked the author warpc0il for the post:
feedthegoatxi (Sun Aug 01, 2021 2:22 pm)
Dave
The Spin Doctor ™
uǝǝɹɔs ɹnoʎ ʇɹǝʌuı ǝsɐǝld :ɹoɹɹǝ
User avatar
feedthegoatxi
Former Member
Former Member
Posts: 110
Joined: Tue Dec 01, 2015 8:21 am
RX-8: 40th Anniversary
Colour: Metropolitan Grey
Location: Stockport
Has thanked: 12 times
Been thanked: 4 times

Re: hit 70k and the problems have started

Post by feedthegoatxi »

...brought my car out of hibernation recently and unfortunately my issues haven't sorted themselves out #-o

done a little vid of the symptoms where I tried to capture the noise whilst running the torque app...

https://youtu.be/u18GM7P2y0Q

* did a battery test and a charging test and they seem good although ground wire did seem to have been 'pinched' probably by the battery cover at some point

* ignition seems healthy to me judging by the blinking tester things (see vid)

* checked and cleaned the following grounds:
** towards the top of both inner wings
** underneath the battery tray/airbox on the crossmember thing
** what I think is the engine ground underneath the spark plugs
** not been able to determine where the other grounds are

* removed the spark plugs and one in particular (T2) seemed to be covered in oil... last changed only 5k but 4 years ago

any advice on the where to go from here much appreciated...
User avatar
New Duke
Club Member
Club Member
Posts: 3396
Joined: Sat Dec 03, 2016 8:38 pm
RX-8: R3
Colour: Sparkling Black
Location: Colchester, Essex
Has thanked: 695 times
Been thanked: 561 times

Re: hit 70k and the problems have started

Post by New Duke »

Yep that plug T2 isn't right. I'd check that coil, or even better get a good set of coils on there to test. Might be worth checking around the housing where it screwed in. Maybe it wasn't in properly? (I don't know if that's even possible)

Great video btw. Loads of detail and well shot. That should really help someone else come and diagnose what's going on.
These users thanked the author New Duke for the post:
feedthegoatxi (Tue Jul 12, 2022 3:26 pm)
User avatar
feedthegoatxi
Former Member
Former Member
Posts: 110
Joined: Tue Dec 01, 2015 8:21 am
RX-8: 40th Anniversary
Colour: Metropolitan Grey
Location: Stockport
Has thanked: 12 times
Been thanked: 4 times

Re: hit 70k and the problems have started

Post by feedthegoatxi »

thinking about it, one plug was loose at one point and needed tightening up again which could explain it
User avatar
casey
Events Team Member
Events Team Member
Posts: 12603
Joined: Sun Jun 27, 2004 7:14 pm
RX-8: 231
Colour: Titanium Grey
Location: Colchester
Has thanked: 507 times
Been thanked: 451 times

Re: hit 70k and the problems have started

Post by casey »

Yep, plug T2 was loose - the sealing washer isn't bright like the others and there's clearly been some leakage from the chamber. You'd have been having very poor compression on rotor 2. I'd start with a set of fresh plugs and go from there. Someone closer to you might even have a used spare set of plugs you could borrow for diagnostic purposes?
These users thanked the author casey for the post:
feedthegoatxi (Tue Jul 12, 2022 4:55 pm)
Essex Rotary Full Bridgeport
Seibon Carbon Fibre Bonnet, "Racing Brake" front calipers, Racing Beat (RB) ARB's F&R, RB REVI intake, full RB Stainless Steel Exhaust & Mani, 20mm Eibach spacers, KOYO Ali Rad, Lightened Fly, Tein MonoFlex coilovers & strut brace, Axial short-shifter, BHR Coils & Engine Mounts, Greddy Sump
Federal 595RS-R or Rainsport 3
YORKSHIRE777
Former Member
Former Member
Posts: 168
Joined: Mon Mar 01, 2021 2:35 pm
RX-8: 231
Colour: Winning Blue
Location: south yorkshire
Has thanked: 99 times
Been thanked: 9 times

Re: hit 70k and the problems have started

Post by YORKSHIRE777 »

I have a spare set of used plugs but I'm near Sheffield
These users thanked the author YORKSHIRE777 for the post:
feedthegoatxi (Tue Jul 12, 2022 4:55 pm)
User avatar
feedthegoatxi
Former Member
Former Member
Posts: 110
Joined: Tue Dec 01, 2015 8:21 am
RX-8: 40th Anniversary
Colour: Metropolitan Grey
Location: Stockport
Has thanked: 12 times
Been thanked: 4 times

Re: hit 70k and the problems have started

Post by feedthegoatxi »

thanks all, I'll order some new plugs and see how I go