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I supported Toymods
Location:
Sydney
Registered:
August 2002
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Leaning out problem....
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Sun, 17 July 2005 02:16
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Arrgghhh, modified cars are going to send me to the loony bin (that's after I file for bankruptcy first)
My car is leaning out terribly and I would like the opinions of those who have either suffered and corrected the problems I am having, or can offer some sensible suggestions as to what to do next...
The basics
Car is MX83 Cressida with Aristo 2JZGTE fitted. Factory everything except for ... 3 inch Exhaust, Intercooler and Pipework, Walbro 255lph (in tank) fuel Pump. Only other mod is a Gizzmo Fuel Cut Defender (which seems to be working fine). Boost runs to about 9-10psi on the first turbo and then from around 4,000pm onwards, runs to 16-17psi on the second turbo.
The problem
It is leaning out to buggery at full throttle. At the toymods dyno day, It was not able to go above about 5,500 as it started to lean out very badly so the run was aborted (see attached dyno sheet)
However, If using up to around 75% throttle - it runs all the way to redline without any problem, and does not lean out, in fact the AFR is almost perfect.
what we have done so far
Measured the fuel pressure
- 42psi with regulator seeing vaccum and about 46 psi with the regulator disconnected
Measured the Voltage at the pump
- 12V Constant
Replaced spark plugs
- re-gapped to .8mm (from 1.1 previously)
There is no problem with the fuel filter
Re-calibrated the Throttle Position Sensor to be zero volts at 0% (although if anyone knows what the voltage reading at 100% throttle is supposed to be, it would be handy to see if the TPS is going over 100%)
any suggestions ???
[Updated on: Sun, 17 July 2005 13:50]
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| | Subject | Poster | Date |
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Leaning out problem....
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Southo | Sun, 17 July 2005 02:16 |
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Re: Leaning out problem....
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Norbie | Sun, 17 July 2005 07:45 |
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Re: Leaning out problem....
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Southo | Sun, 17 July 2005 14:38 |
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Re: Leaning out problem....
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oldcorollas | Sun, 17 July 2005 16:42 |
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Re: Leaning out problem....
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Norbie | Mon, 18 July 2005 04:04 |
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Re: Leaning out problem....
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Chris Davey | Sun, 17 July 2005 23:25 |
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Re: Leaning out problem....
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Southo | Mon, 18 July 2005 01:45 |
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woo hoo - 245kW - Leaning out problem....fixed....:)
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Southo | Mon, 25 July 2005 09:58 |
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Re: Leaning out problem....
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sideshow | Mon, 25 July 2005 10:04 |
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Re: Leaning out problem....
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Southo | Mon, 25 July 2005 13:21 |
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Re: Leaning out problem....
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Norbie | Tue, 26 July 2005 00:23 |
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Re: Leaning out problem....
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Southo | Tue, 26 July 2005 01:47 |
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Re: Leaning out problem....
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Norbie | Tue, 26 July 2005 01:56 |
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Re: Leaning out problem....
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Southo | Tue, 26 July 2005 02:27 |
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Re: Leaning out problem....
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MS-75 | Tue, 26 July 2005 10:06 |
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Re: Leaning out problem....
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sideshow | Tue, 26 July 2005 11:34 |
