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Old 02-07-2013, 10:28 PM
davew833 davew833 is offline
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Location: Salt Lake City, UT
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11 mpg ????

Thought I'd start a new thread on this since I had a few comments on my PCV thread relating directly to my MPG problem..

'94 SVX LS 2WD... averaging about 11 MPG lately. It was suggested in my other thread that it might be a stuck open injector, a fuel leak, or bad cats-- Is there any way to test for these specifically?

It passed Utah emissions test in December with no problems. No Check Engine codes either.

I ran a bottle of FI cleaner through it last week and it didn't seem to have much effect. This week's attempt to improve things involves replacing the PCV valve and the under-manifold vacuum lines (can't really do one without the other...)

I did find when I removed the throttle body "snorkus" that one port was folded under causing it to not seal to the throttle intake correctly, and that the inside of it had a pretty thick coating of engine oil.

Any other suggestions?
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Old 02-07-2013, 11:31 PM
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icingdeath88 icingdeath88 is offline
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Re: 11 mpg ????

Are you using 87 octane, or 91? When was the last time the plugs were changed, and do you know what kind were used?
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'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project

'97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod

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Old 02-07-2013, 11:40 PM
bishop bishop is offline
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Re: 11 mpg ????

have the brakes ever been done, i lost a few miles when my were sticking.
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1992 SVX Pearlie: AmsOil signature synthetic 10w40 and Ea15k20 filter, Cobb crank pulley, Outlaw Engineering spacers and tb bypass, LGT 5spd, Slotted Crossdrilled rotors and ceramic pads, 11:1 compression, EGR delete, Port & Polished heads, SaikoMichi catch can, A/c delete.
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