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Old 03-28-2012, 07:12 PM   #1
2nd Gear Member
Wuzie's Avatar
Join Date: Dec 2011
Location: Ottawa
Posts: 183
M20 Uses 40L/100km at Idle!!

Hey guys.. my car has been through a bit of mishap. The fuel rail was leaking previously. I swapped the rail from an eta engine, of course the holes didnt line up, we rerouted things around. Kept my blue top injectors and fuel pressure regulator. This fixed the leak, hooray.

Everything was dandy aside from my vacuum leaks. I was getting shitty mpg (around 8mpg honestly) and once I fixed everything, swapped a new elbow intake boot piece, but that was also from an eta engine.. so things didnt line up properly. This fixed the idle for a bit, but then fuel economy was bad again, so I put my stock boot piece back on and taped every leak as well as clamped them shut.

This worked! Started to get down to 8.8L/100km and right now it averages about 20-23mpg while driving. However, at idle, I see the little needle showing consumption shoot all the way to the end. And once I reset the thing on the OBC, it shoots up to 40L/100km !

Whats going on here? Can anyone relate or help me out please?
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