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WRCjosh
16-12-2008, 09:06 AM
at the moment the car is at ovaboost and their trying to sort an issue...

symptoms are:

ignition on, ecu will read the engine as doing 30,000rpm (hasnt been cranked), it will then flicker back to normal then to 5,000rpm and so on.

If you switch something in the ecu from +ve to -ve, it will idle, but wont rev (sounds like theres a limiter) and if you switch back to +ve, it wont idle, but it will rev.

cam sync is way out, ranges from 5% to 250%

timing is all over the place

now they've tried 4 different crank angle sensors, 2 second handies, a custom made one and a brand new in the bag GM/Nissan item. The nissan item made it the worst its ever been shooting up to 32,000rpm.

We've got a autronic trigger disc in it, the wire from the CAS has been re-routed seperate from everything to avoid interference and they used a shielded wire.

Theyve plugged in a new SMC box, did the same thing so its not the ECU.

its also running individual coils with a 500R cdi box

Anyone heard of this occurring? Sometimes these things are something silly, so i thought potentially someone may have come across it before...

cheers
JME
16-12-2008, 09:23 AM
Shoulda put a 2J in it.
WRCjosh
16-12-2008, 09:25 AM
wanna swap?
cplagz
16-12-2008, 09:26 AM
What version SMC are you running Josh?
cplagz
16-12-2008, 09:27 AM
also, try www.mrm-racing.se/forum

There's a post there about RB30 CAS - I can't read it though and can't remember my login pwd.

http://www.mrm-racing.se/forum/showthread.php?t=645
JME
16-12-2008, 09:28 AM
wanna swap?

Nah im content with my headache. If all else fails, blow through carby!
cplagz
16-12-2008, 09:29 AM
If you switch something in the ecu from +ve to -ve, it will idle, but wont rev (sounds like theres a limiter) and if you switch back to +ve, it wont idle, but it will rev.

Ignition dwell?

Have you tried hooking up an Oscilliscope to see if the cam sync and crank sync are producing proper signals?
WRCjosh
16-12-2008, 09:32 AM
i'm not sure of the version, its on the box but i cant remember it.

Yeah all fairly standard answers in that thing... The fact we've tried 4 CAS's and all do different things makes me think its not an issue with the c.a.s...

I have my coil's mounted on a ally plate which is fixed to my engine bay... Does this need to have a seperate earth? Could a dodgy earth be causing these issues?
cplagz
16-12-2008, 09:49 AM
Do you need the reluctor interface?
cplagz
16-12-2008, 09:54 AM
Also, whats the voltage like going to the ECU ? Is it stable? Could cause problems. Dodgy grounds, bad alternator
Saf
16-12-2008, 09:58 AM
Have you tried to get in-touch with Lumpy or Ray Hall ?.

Not heard of that issue before, is it a new ecu ?. Im not sure how much support is around for autronic nowadays, it kinda went pear shaped there for a time, but those two are a good start.
WRCjosh
16-12-2008, 09:58 AM
reluctor interface? flux capacitor? whats that bro?

as for the voltage, not sure what it is at the ECU? Sounds like its really a problem that someone will need to sit down and spend bulk time on
WRCjosh
16-12-2008, 10:01 AM
Have you tried to get in-touch with Lumpy or Ray Hall ?.

Not heard of that issue before, is it a new ecu ?. Im not sure how much support is around for autronic nowadays, it kinda went pear shaped there for a time, but those two are a good start.

Mick tried lumpy, who suggested the trigger disc/cas change... Ray Hall we havent tried, simply because it would be a bit rude after the situation with him and autronics... Autronics do have a tech line, but i dont feel like i'd get anywhere, i think it may be something they need to actually come out and suss for themselves.

this has been going on for over 4 weeks now so im getting a little tired of it and contemplating other options
Saf
16-12-2008, 10:03 AM
Talk JME into a Motec for his Supra, then talk him out of it, and buy his motec for 5 hunge.
JME
16-12-2008, 10:05 AM
My names, JME not Nathan :p
WRCjosh
16-12-2008, 10:07 AM
saf its an rb30! you could put a carby on it and i reckon it will still have a brainfart
abuse
16-12-2008, 10:11 AM
have you tried Sean at allstar Josh hes pretty good at figuring out stupid shit like that hey
cplagz
16-12-2008, 10:19 AM
I don't know kind of sensors they are, VR or Hall ?

Try Ian at Autronic, I know a that some people have had a good response. He might be able to give you some ideas.

What are others with RB30's and Autronic doing?

I just read something about the timing loop that nissans use? http://www.efi101.com/forum/viewtopic.php?t=3047
cplagz
16-12-2008, 10:27 AM
Josh, you're welcome to grab my SM2 and see if there are any settings in it that may help you?

The guy I bought it off had it running on a VL.
Fryman
16-12-2008, 10:39 AM
My names, JME not Nathan :p

lol sorry got confused there too :)
WRCjosh
16-12-2008, 10:39 AM
cheers mate im going to give it a week and if its not fixed, ill take the car back on monday and re-asses the situation
cplagz
16-12-2008, 10:47 AM
What have you got the signal set to? Leading or Falling edge? Try switching it around.

Disconnect the crank sensor, turn on ECU, see if it still jumps RPM around. Do same with cam sensor. Narrow it down to if its cam sensor or crank, if it still does it with both disconnected then there's an issue somewhere else...try disconnecting the CDI next? If not, then you know which sensor/wiring you need to look into.

It's only going to be a process of elimination. Make sure you have stable battery voltage at the ECU as well.
devilfish
16-12-2008, 11:29 AM
FIRST check your earths. make sure the ECU has a good earth CLOSE TO THE UNIT on the chassis, dont run a wire to the neg terminal.
gtr_eta
16-12-2008, 02:53 PM
Is the shielded cable earthed??? sure it not interference?
WRCjosh
16-12-2008, 02:57 PM
i would IMAGINE that between mick/brad they would have earthed it, but i didnt install it sean so i couldnt tell you...

If it was just interference, wouldnt it be fairly uniform issues across the board, instead of having varying degrees of fuck-up when the CAS's were changed?
cplagz
16-12-2008, 04:29 PM
Cars do fucking odd things josh, you and I both know this very well :)

Never hurts to double check.
pshrdeta
16-12-2008, 05:33 PM
I don't know kind of sensors they are, VR or Hall ?

Try Ian at Autronic, I know a that some people have had a good response. He might be able to give you some ideas.

What are others with RB30's and Autronic doing?

I just read something about the timing loop that nissans use? http://www.efi101.com/forum/viewtopic.php?t=3047



im pretty sure they are optical sensors
DCIEVE
16-12-2008, 07:09 PM
autronic tech support are actually very helpfull, give them a go

otherwise turner or lumpy would be who I look to for troubleshooting, factory re are also on the ball with autronic gear
STEALTH
17-12-2008, 07:07 AM
if you want the whole Autronic SMC wiring manual let me know, its about 100+ pages and covers all the technical problems and how to fix them.

just PM me your email as its way to big to attach on here
cplagz
17-12-2008, 02:08 PM
Josh -
The Reluctor Interface is used when your engine is equipped with magnetic sensors. It converts the magnetic signal to a signal that looks to the ECU like a Hall signal.
Denver
17-12-2008, 03:55 PM
Given your running a cdi, have you gotten rid of the dwell board in the autronic?, if it had one..
WRCjosh
17-12-2008, 05:26 PM
im actually not too sure, however, we tried to run the car without the CDI hooked up and suffered the same problem?
unique1
17-12-2008, 07:26 PM
hey Josh ring the tech guy at autronic he is very helpful and seems to know a fair bit, he will atleast get u in the ballpark on where to look exactly.

I have run a smc with cdi and dwell board (didnt find out till later) and its fine, it just doesnt like anything over about 18psi and 600rwhp (and over 7500rpm or so it starts misfiring).

good luck with it