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Location:
Perth
Registered:
June 2002
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1jz problems
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Wed, 20 April 2005 10:21
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had dramas a few weeks back with odd sparking in 1jz
seems to have subsided with better earthing of wires and what not.
car now runs, but misses through out the rev range, wont rev over 3500ish
giant plumes of fuel smoke when reving above 2K
its coughs, splutters, farts and wont rev.
plugs come out black as sin after liek 10 mins of idleing and a few revs
ive reset the ecu to no success, replaced plugs, havent replaced coils yet.
any ideas of whast could be the cause of the massive overfueling? i cant locate any vac leaks
somepeopel have thrown up ideas of O2 sensor, water temp sensor, map sensor...
ROss
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Location:
Perth
Registered:
October 2003
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Re: 1jz problems
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Thu, 21 April 2005 00:00
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Is the loom hooked up to the check engine light?
If so run a diagnostic.
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Location:
Wollongong
Registered:
November 2004
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Re: 1jz problems
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Thu, 21 April 2005 10:29
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Sounds like the ECU has logged a major error, and is running in limp mode and pumping MASSES of fuel into the engine to avoid a problem...
Maybe the AFM is fuxored and the ECU knows it?
Check for diagnostic codes...
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1jz problems
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Thu, 21 April 2005 10:43
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afm would be great if 1jzs ran an afm  (I'm assuming it's the twin turbo?)
I had a similar problem with my 1j, but it was running aftermarket ecu. the problem was caused by the cam sensor being reverse wired.
could also be caused by incorrectly gapped plugs (should be 0.8mm)
is the car a stock fitted 1jz?
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Location:
Wollongong
Registered:
November 2004
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Re: 1jz problems
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Thu, 21 April 2005 10:57
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| draven wrote on Thu, 21 April 2005 20:43 |
afm would be great if 1jzs ran an afm (I'm assuming it's the twin turbo?)
I had a similar problem with my 1j, but it was running aftermarket ecu. the problem was caused by the cam sensor being reverse wired.
could also be caused by incorrectly gapped plugs (should be 0.8mm)
is the car a stock fitted 1jz?
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I can't remember what they run... Must be Map then...
Same shit, different smell really
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Location:
Perth
Registered:
June 2002
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Re: 1jz problems
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Thu, 21 April 2005 13:18
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tried and pull the codes
engine light doesnt flicker/flash
stays illuminated
hmmm
ROss
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Location:
Perth
Registered:
October 2003
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Re: 1jz problems
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Fri, 22 April 2005 00:07
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Stop wasting time and put an aftermarket ECU on the thing 
BTW that is a seriously good looking Z20!
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Location:
Perth
Registered:
June 2002
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Re: 1jz problems
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Fri, 22 April 2005 09:53
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haha it gets aftermarket ecu next week, just woulda been nice to drive it to the shop
and see the difference between stock and modded power
ROss
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1jz problems
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Fri, 22 April 2005 15:17
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Pull out all 6 plugs, sound like maybe a few aren't firing.
Then again, when one of my coils stopped working (ie, 4cyls died)
All that happened was that it sounded like a diesel, had no power, and the cat were glowing after about 2mins.
There was no black smoke though...
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