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Location:
Newcastle, Australia
Registered:
March 2005
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1JZ Cressida O/D Light Flashing, other problems
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Sun, 12 June 2005 12:17
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Hi guys, when I bought the cressida the O/D light has always been flashing when I drive. Finally got some free time and pulled code 61...which is speed sensor #2. Just wondering how I fix this?
I had a search thru the forums and someone had mentioned something about needing an MX83 transmission housing or something, but not sure if that is related. Rather not spend a lot of $ to fix what seems to be a minor problem. Also the speedo needle tends to wobble around a bit when I am doing about 40kph, but then settles down when I hit 60 or so kph. Doubt that is related though.
The car uses a stack of fuel, 18-20L per 100km, even when driven fairly sedately, what fuel economy do you other 1JZ cressida guys get? Just trying to see if this is normal. The MX6 (also a 2.5L 6cyl) used 10-12L per 100km around town, but weighed 200kg less and wasn't turbo.
Would the O/D light flashing put the motor into some sort of emergency mode that uses more fuel? Or is that more for errors like O2 sensors etc? The car has an SAFC, which has been tuned apparently, but could this be responsible at all?
The tacho doesn't work (the SAFC is my tacho for now), can I just change the resistor in it as outlined in the Word doc elsewhere on this site, or do I need one of those tacho boosters from Sixworks? If so are they simple enough to fit? Do they go in the engine bay, or just behind the dash?
The car seems to hit some sort of power loss issue at highish revs (4000RPM+), the car should be putting out around 170kW at the wheels, and sometimes pulls hard when driving (fun!), but other times seems to hit some sort of boost/fuel/other cut. On the dyno I only got about 114kW, so something is definitely amiss.
Here is an MP3 of it on the dyno when it was playing up:
http://ribfeast.no-ip.com/cressida/cressida_dynoso und.mp3
Some of the suggestions I have heard and other ideas I have come up with are:
Coil packs (engine has 87,000kms)
Spark plugs (just fitted new BKR6E-11 plugs, will try regapping to 0.8mm soon). Previous owner tried doing this though and it didn't work he said.
Clogged injectors (ran injector cleaner thru the fuel to no avail)
Fuel filter clogged
Old/bad fuel - car was unregistered/undriven for 18 months. I've burned the old fuel thru and filled up twice now, same problem
MAP sensor (I have a spare, have yet to try this though)
Badly tuned or even faulty SAFC - overfuelling or underfuelling? Maybe it is running too rich and clogging the cylinder/not burning fully?
Wrong engine tune? Maybe it is tuned for 102 octane?
O2 sensors - chassis has 218,000kms on it
Boost cut (car is running stock boost though?)
Fuel cut
Fuel pressure regulator?
Any other ideas or something that can help me narrow it down? Will it hurt the car while I am driving it like this? It is fine for regular driving, but I don't want to damage the engine or melt a piston if there is any risk.
The colder the night the less it seems to happen I think, but need to confirm this.
I might even try and see Shane when we can arrange a time when we are both free, could just be something simple.
Bit of a long one but hopefully someone can help me sort all this out. Thanks heaps! 
[Updated on: Sun, 12 June 2005 12:20]
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Location:
sydney
Registered:
March 2003
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Sun, 12 June 2005 12:41
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u need a tacho booster top get tacho to work
u also need to hook up the 2nd speedo sensor to stop the copde from comin up
its not crucial but its just missing one of the speedo signals
i think who ever wired it up didnt know exactly what they where doin
does it change gears ok
is it a soarer 1j or a chaser 1j
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Location:
Newcastle, Australia
Registered:
March 2005
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Sun, 12 June 2005 12:43
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OK I'll contact Sixworks for the tacho booster, they are just around the corner.
Where is the 2nd speed sensor?
The car uses a JZX81 Chaser 1JZ frontcut.
Seems to change gears OK.
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Location:
south west sydney
Registered:
November 2002
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Sun, 12 June 2005 22:51
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Ribfeast,
Same problems as mine however have had mine in for 3 years and still no problems, recently placed car on chassis dyno to get fuel right and came back that every thing was a ok just a big heavy sucker of a car.remember that a aus spec cressy weights nearly 1600 kgs and the 1jz is much the same as 7mg weight.
Squeak
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Location:
Newcastle, Australia
Registered:
March 2005
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Location:
Wollongong, NSW
Registered:
January 2004
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Mon, 13 June 2005 05:45
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Im getting sucky fuel economy out of my stock cressida, along the same lines. I'm wondering if the fuel maps are out.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Mon, 13 June 2005 06:42
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Fuel maps are fine.
5M-E's drink like a fish anyway. Expect about 12L/100km on highway. Maybe 11L if everything is perfect and as new.
Check the timing as that will play the biggest role.
As for the O/D light, I'd say either the SP2 sensor has died, the wiring has been damaged, or the person doing the swap has not used the autobox matched with the ECU, and SP2 hasn't plugged in.
SP2 is the sensor at the rear of the box just below the speedo gear.
SP2 is also the primary input with SPD or SP1 as the backup.
Either fix it to get rid of the annoying O/D flashing, give it to someone to fix, or pull the dash apart and remove said O/D globe.
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Location:
Newcastle, Australia
Registered:
March 2005
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Mon, 13 June 2005 06:56
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I'd kill for 12L/100km on the freeway lol
This engine isn't a 5M-E, but maybe the timing needs looking at. Is there anywhere special I'd need to take it to get the timing sorted out (ideally Newcastle)? It might have been tuned for 102RON or something in Japan.
I'll have to ask Scrote about the SP2 sensor, I think he was the owner of the car when the conversion was done. Does it hurt anything to leave it flashing? It doesn't put the ECU into fault mode does it? Or is that just when an O2 sensor fault code is set? I think some ECUs use a default fuel map or something when some (or all) codes are set.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Mon, 13 June 2005 07:07
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I think in your members ride thread you were told to take it to JT's.
Take it there.
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Location:
Newcastle, Australia
Registered:
March 2005
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Mon, 13 June 2005 09:08
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Just replaced the MAP sensor with a spare, and then went for a spin down on the Charlestown bypass. The road was wet so I kept breaking traction while trying to nail it, but I couldn't get it to play up in any case. Couldn't try too hard as it's a double demerit weekend. I'll give it a good drive over the next week and see if it plays up, but I'm crossing my fingers that this has fixed it! Will see what the fuel economy is like over the next week too. If this doesn't fix it then down to JT's it goes (or RX engineering).
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Location:
Newcastle, Australia
Registered:
March 2005
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Re: 1JZ Cressida O/D Light Flashing, other problems
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Wed, 15 June 2005 07:19
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Put the original MAP sensor back in, regapped the plugs to 0.6mm, and fitted the LSD. Seems to go a bit better, also tested the O2 sensor and that is fine too. Will stick it on the dyno soon to see what it does, but it is definitely behaving a bit better now. Might rip off the SAFC too and just keep it for tacho duties.
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