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#1
09-09-2007, 19:18
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bum. sold me car cos of the poor fuel (and ridiculous insurance) and it could have been this :P why didnt I find out this before
 Although the wideband showed it as lean on tick over, even crusing at 30 so about -10PSI boost she was reasding and AFR of 13.something i.e. a touch rich 
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#3
09-09-2007, 20:24
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13 is lean mate, i would not run an engine in the 13's on boost
 , i'd say about 14's on tickover, although my mk1 din't like to tickover that lean, i think it was an airspeed issue due to the large throttle body and big tubby, but once it was moving it was ok, i got it mapped as lean as i could at 70mph untill it started to misfire, then put some more fuel in, it did around 32mpg on a long run.
__________________
 fj20/et a replacement for displacement 
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#4
10-09-2007, 00:04
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minus 10PSI i.e. not on boost, just crawling. For some reason the best I ever got from her was 20mpg and pushed you could get that close to single figures.
Srukk sge gas gone now so nothing much I can do about it
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#6
10-09-2007, 19:21
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it was my innovative motorsports wideband Martin.
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#8
11-09-2007, 10:18
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didnt sell the wideband with the car
 only put that in to see what results I got, then I switched it back to the narrow band for everyday use. Didnt want to kill the wideband sensor by running it all the time, and its not the smallest meter ever so finding a perminant home for it would have been a little tricky :P30PSI - yup she should have been running 14.7:1 but just toddling along off bost she was 13:1. the fuel economy was definatly not what it should have been, and now Im wishing I had got a fuel pressure gauge and checked that too. Never mind though, I've done 70 miles on the first 1/8th of a tank in my Primera, and the insurance was a whopping £456 cheaper. Oh and she has a proper old man towbar with dual lighting hook up, track day tow car anyone
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