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Old May 10, 2006 | 11:35 PM
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rstdave
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From: Bristol/Bath
Default Underfuelling problem.....

A friend of mine was settin me car up today after it bein off the road for more mods, and couldn't get it to fuel properly over 1.2bar boost (wantin to run 1.5), still on mfi. It would fuel ok up to about 4k on 1.5bar but then steadily lean out from there till it was goin towards 1.0 lambda. This was happenin even with increases in fuel pressure, whereby it would become rich as hell at the bottom of the rev range makin it horrible to drive, but still not givin any more fuel at the top of the rev range. The fuellin was bein monitored via lambda probe in the front pipe and a motech monitor in the car (so proper monitoring), all we can think of is that the meterin unit is faulty or the fuel pump not supllyin enough fuel???? The fuel pump's a brand new bosch jobbie, with the supply bein re-wired so no problem with low voltage. Any ideas lads
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