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Location:
Baulkham Hills, Sydney
Registered:
February 2003
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 jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Wed, 17 September 2003 22:16
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my supra has been behaving badly of late, seems to stall frequently whenever i let the revs drop back to idle (like at lights, tool booths, drive thrus, and when i'm trying to let the turbo timer run).
however it also seems to feel like it wants to stall at other times but it can't because the revs are too high (am i making any sense?).
i have also had a problem before this that often while boosting i get a strange spluttering sound (actually better described as a cross between a machine gun and a fart) out the exhaust, the revs seem to stagger while they climb and i basically go nowhere. other times i boost ok though, not that i try it much anymore 
oh and sometimes i get a noise from my clutch when i'm in neutral, sounds like a clattering/scraping noise. i've got a 6 button clutch but it didn't always make the noise. i'm not even sure it is the clutch, but when i disengage the clutch in neutral the noise goes away.
thanks, sorry for the highly technical descriptions of my problems 
[Updated on: Wed, 17 September 2003 22:19]
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Thu, 18 September 2003 06:25
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does it always try and stall when at idle, or is it an intermittant problem?
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Location:
Sydney
Registered:
May 2002
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Location:
Baulkham Hills, Sydney
Registered:
February 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Thu, 18 September 2003 07:26
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well it's intermittent, but if it doesn't stall it's idling at around 350-400rpm which is pretty close.
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Location:
Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Thu, 18 September 2003 07:58
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we actually had a 4WD in yesterday with intermittent missing.....ill find out what that was
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Location:
Wollongong
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Thu, 18 September 2003 09:00
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Is it the TT version ?
I've heard some bad stories about venting BOVs on JZA80s cos they are AFM and not MAP based engines.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Thu, 18 September 2003 09:11
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jza80 is afm?!?
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Location:
Sydney
Registered:
March 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Thu, 18 September 2003 09:22
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JDM JZA80 pre VVTI is is MAP.
JDM JZA80 VVTI is MASS.
What year model is this?
The clattering from the clutch is ok, you'll find it's more than likely the gearbox rattling away - the Getrags are known for this.
Check the ECU for any codes
Check the O2 Sensor connector.
Check all your fuses, check all the connectors, check your plugs, check all your intercooler piping and hose clamps.
Reset the ECU - pull the 2 EFI fuses out for about 5 minutes.
How many km's has this motor done?
Is it running the original fuel filter?
Is it running the original fuel pump?
More information would be nice, like does it do it predominantly when cold or when it's up to operating temp?
Check the earths on the ECU and any other earths (Battery negative to block).
Check the vacuum line that goes to the map sensor and make sure it's on securely and has no air leaks (if this is a pre vvti model).
Check to make sure all the connectors going to the coil packs are plugged in correctly.
The O2 sensor could cause these problems if it's died, this recently happened to a member of PerformanceForums 2JZ.
There is probably heaps of things I've missed, but that's a start.
[Updated on: Thu, 18 September 2003 09:26]
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Thu, 18 September 2003 09:34
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it's not the O2 sensor - that died recently, and the symptoms weren't nearly as bad (since replaced)
motor's done 80-90k .. fuel filter was replaced at the last service around 500kms ago, fuel pump is still the original item I'm pretty sure
I'll be checking it out tomorrow - top on my list was a check of the sparks and coil pack connections. apparently JZ turbo engines fry coil packs on occasion
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Location:
perth WA
Registered:
January 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Fri, 19 September 2003 10:34
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clutch rattle sounds lik a shagged thrust bearing ..
sounds lik your hitting boost cut ( the farting noise .. u have exhuast or tweaked the boost )
as for stalling .. ???
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Sun, 21 September 2003 01:19
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ok 2j freaks - supposedly an alan key doesn't have enough leverege to get off the bolts holding the coil pack cover in place. I haven't tried yet, but is there another way to do it?
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Location:
Wollongong
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Sun, 21 September 2003 02:14
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I used to use an allen key to get the 1JZ cover off. I now use an allen key 'bit' in a rachet. I'm guessing that is what you are asking about. Taking the top cover off to get to the coil packs/spark plugs ?
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Location:
Brisbane
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Sun, 21 September 2003 02:15
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I didn't have any problems using a normal allen key to get my cover thing off. Perhaps you just have girly arms?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Sun, 21 September 2003 02:20
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not me - my mate!
and yes, he does have girly arms (I'm gonna cop it for that when he reads it)
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Location:
Sydney
Registered:
March 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Sun, 21 September 2003 07:24
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| slylux wrote on Fri, 19 September 2003 20:34 |
clutch rattle sounds lik a shagged thrust bearing ..
sounds lik your hitting boost cut ( the farting noise .. u have exhuast or tweaked the boost )
as for stalling .. ???
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It's a Getrag V160 - this is a common occurance when a different clutch/flywheel is used other than the factory item.
Draven - so have you figured out the problem?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Sun, 21 September 2003 08:50
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it's behaving much better now
the sparks apparently hadn't been changed in at least 20 000kms, and I'm guessing at least another 5 before that (bare minimum)
put in some new sparks, and it works a charm.
incidentally, repco claimed they didn't stock the sparks for a mkIV turbo supra - as this was an import
when I asked for the part number on a different call "of course, how many would you like?"
*sigh*
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Location:
Baulkham Hills, Sydney
Registered:
February 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 00:47
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girly arms! 
you bitch! *slaps frantically*
i got 'em off eventually... they were not to be moved by human hands alone.
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Location:
Baulkham Hills, Sydney
Registered:
February 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 00:59
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yes, thanks for your help drav
i have an update on "behaving much better"...
true yes it is much smoother and i can definately notice the difference, but it's still stalling  also my "check engine" light flashed on and off for a minute or two this morning  - i pulled over momentarily but there wasn't much i could really do and it didn't do it again afterward...
loose connection on the coil packs maybe? *shrug* what do i know
drav, you nearly got a call at 7:30!! 
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 01:04
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oh, I would have been thrilled :\
hrm, told ya not to get your hopes up that that was the only problem.
hrm - you're not home otnight are you?
I might pop by tomorrow, and check a few other things
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Location:
Baulkham Hills, Sydney
Registered:
February 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 01:34
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not home until a little later than usual, around 9ish yeah.
more info...
93 Mark IV. happens at operating temperature as far as i've ever noticed.
i'm pretty sure it's the original fuel pump.
draven, it was the temp sensor we replaced wasn't it? gotta love speed bumps
i think my clutch is approaching EOL. i never liked the 6 button for peak hour victoria road traffic anyhow!
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 01:39
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mmm.
I've been having a poke around on the mkiv site - we'll check the error codes and see what's happening. a couple of people have mentioned possibly O2 sensor on its way out
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Location:
newcastle
Registered:
June 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 12:12
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this sounds just like fouled plugs .ive seen 3 or 4 1js do the same thing. fit ngk bkr6es gap to 0.8mm spark plugs and change every 10,000 klms at $3 each they are cheap and much better than factory plugs
. a mate with a 2j put me on to these and they work great
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 12:38
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yeah
only problem is we've changed the plugs and the problem is still there
not as bad (the plugs were badly fouled), but still there. next check is the error codes - I'm betting on o2 sensor dying
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Location:
Baulkham Hills, Sydney
Registered:
February 2003
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 13:42
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ehehehehehe
you should have just asked me round ... I'm running out of excuses not to do my thesis anyhow
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Location:
Baulkham Hills, Sydney
Registered:
February 2003
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Mon, 22 September 2003 13:58
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you can procrastinate tomorrow finding the thingie uh the air intake sensor that is
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: jza80 misbehaviour - keeps stalling, boosts badly, makes weird noises and uses stacks of petrol
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Tue, 23 September 2003 12:41
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the problem never occurs until 20 minutes into the gourney - well after operating temperature has been reached. i'm out of ideas.
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it must be love