Rx8 misfired and died

osman · Post by **osman** » Sat Jan 25, 2020 1:07 pm

Was driving around yesterday, revved engine out and then car started misfiring sounded like it was running on one rotor. Got to traffic lights and car stalled and wouldn't start again sounded like it's was just spinning one rotor. Pretty sure I flooded it from all the cranking.
Was having issues with cold starts (taking abit longer) but I put that down to the cold weather.
Going to try pull the spark plugs (7k on them) out now, it's got d585r coils with 20k on them

Any insight would be appreciated

Post by **warpc0il** » Sat Jan 25, 2020 1:18 pm

Could be a ignition problem or fuel pump, or ESS, though the first thing I would look for is oil on the MAF.

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osman · Post by **osman** » Sat Jan 25, 2020 1:57 pm

Thanks

Checked maf last night was clean, had cleaned a few week prior
Got a walbro 255lph fuel pump aswell
Will check ESS

Post by **warpc0il** » Sat Jan 25, 2020 3:01 pm

That upgraded fuel pump can overheat the low-speed resistor, located by the Secondary Air System unit.

Plug in a ODBII reader (or ELM327 dongle and Torque App) and check for any Pending codes.
Pending codes are events that will only light the

if they occur again in the next drive cycle, but they can be important

BigPete · Post by **BigPete** » Sat Jan 25, 2020 3:05 pm

Pull the D585’s off and try standard c coils

osman · Post by **osman** » Sat Jan 25, 2020 3:16 pm

Pulled the plugs and checked spark from each of them
T1 isn't firing at all and L1 seems weak
Rear is all good

osman · Post by **osman** » Sat Jan 25, 2020 3:18 pm

Don't have any stock coils to test with

Post by **warpc0il** » Sat Jan 25, 2020 3:36 pm

If the dwell has already been changed to match the D585s then it would soon kill stock coils, for anything other than a very short start-up test.

The weakest link in D585 setups are the loom adapters, so disconnect and visually check each end.

BigPete · Post by **BigPete** » Sat Jan 25, 2020 3:40 pm

I’ve just pulled a set of d585’s off a car that ran fine until it hit 6k then it just didn’t pull from there, seems like the coils were failing under load. Car hadn’t been mapped for them so swapped to c coils and it drove spot on. I’ve now got 4 sets of D585 coils that have failed in one way or another.

osman · Post by **osman** » Sat Jan 25, 2020 3:54 pm

Loom seems all ok, was the L1 coil pack which wasn't firing not t1
It's a rotary revs kit so will contact them
Thanks for all the help

Don't understand why it wouldn't start still, just kept turning over

Thanks for all the help

Post by **warpc0il** » Sat Jan 25, 2020 4:01 pm

viewtopic.php?f=132&t=81118

PaulAV · Post by **PaulAV** » Sat Jan 25, 2020 4:15 pm

On cranking I believe the engine only fires the leading coils (I could be wrong though) it might be worth while swapping the leading for the trailing just to test, the car will run fairly well on just leading coils and if a trailing coil has failed or is failing you probably wouldn't notice.

LeeW · Post by **LeeW** » Sat Jan 25, 2020 5:13 pm

Sounds very very similarly to what I experienced when mine failed.

Follow warp coils link then see the link to the thread in the first post for my story.

osman · Post by **osman** » Wed Feb 19, 2020 3:54 pm

Got rr to check coils and have all been given the green light
Never had any starting issues before this and car was rebuilt by them 20k miles ago

Cleaned and reset ess still nothing

Ryan Rotary Performance · Wed Feb 19, 2020 4:04 pm

Maybe a dry connection within the wiring loom causing intermittent faults and weak sparks?

Post by **warpc0il** » Wed Feb 19, 2020 4:36 pm

Where have you got the additional D585 earth connection connected?

osman · Post by **osman** » Wed Feb 19, 2020 5:45 pm

Will check wiring loom , plugs only covered 7k shouldnt be too bad to lose complete spark

Got it earthed to negative terminal as per instructions
Going to see if rotors have any compression

Ainmhidh · Post by **Ainmhidh** » Wed Feb 19, 2020 7:03 pm

Check the earth(s) are all secure and good connection too, body and battery.

osman · Post by **osman** » Sat Feb 22, 2020 6:16 pm

Update on this, one leading plug still not firing, swapped over the wiring harness to put a trailing coil as leading and it sparked

Rotary revs have said all the coils are fine and checked out :S

PaulAV · Post by **PaulAV** » Sat Feb 22, 2020 7:18 pm

What about the adapter harness?

PaulAV · Post by **PaulAV** » Sat Feb 22, 2020 7:18 pm

Could be a loose wire

osman · Post by **osman** » Sat Feb 22, 2020 7:26 pm

They've checked everything leads and harness too all checked out
Checked the wires a few times all connected properly

Could ESS mess up and not send a signal to some coils?

Post by **warpc0il** » Sat Feb 22, 2020 7:32 pm

The ess connects to the PCM, if this signal is uneven then that causes a misfire code.

The PCM fires the coils.

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350matt · Post by **350matt** » Sat Feb 22, 2020 11:07 pm

sounds like you've already diagnosed a faulty wiring loom to me
on this site is a wiring diagram sowing what ECM pin relates to what connector plug so I'd use that to confirm that the wire resistance between the coil plug and the ECM socket is no more than 3 ohms

osman · Post by **osman** » Sun Feb 23, 2020 9:04 pm

Took kks sports cat off today and can hear it move around when I shake it, running a rb header with no secondary air pump must've taken its toll and blocked it up

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Rx8 misfired and died

Rx8 misfired and died

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Re: Rx8 misfired and died

Re: Rx8 misfired and died

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Re: Rx8 misfired and died

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Re: Rx8 misfired and died

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Re: Rx8 misfired and died

Re: Rx8 misfired and died