12mpg...Sound about right w/ 4.10s + roof rack?

[audiquattrot]

do you have a fuel leak or something? plugged fuel return line? with it being that rich, it would have to be billowing black, stinky smoke..

i don't see any signs (smell) of any fuel leak, but not sure what exactly i should be looking for. I would expect a strong odor of fuel when parked if i was leaking, but I'm not. My exhaust tips do have black soot which i only notice between car washes, but not exactly billowing.

[nando]

do you have a fuel leak or something? plugged fuel return line? with it being that rich, it would have to be billowing black, stinky smoke..

[audiquattrot]

For what it's worth, there's a DIY somewhere to make a Ford F150 o2 sensor fit and they're around $45 at autozone. Just have to change the wiring for your o2 connector.

yeah i saw a thread about that. Just wanted a plug n play connection....didn't feel like splicing.

i saw plugged cats all the time in the rx8 world, but rx8 EGT can run 1800 degrees, with 2000 degrees being in the realm of possibility. e30s dont run anywhere near that hot. so i doubt a clogged cat as well.

95% highway with my ix (i moved) now, i get 24-26mpg. 24, windows down, 80-85mph. 26, windows up, 75mph, trying to keep it easy on the throttle. and my bottom end has ~370k miles, i havent checked compression, but i doubt it's that great. worked head though. 17.5lb injectors.

o2 sensor. afm cleaned? can you swap dmes with someone?

I read many threads about cleaning afm's and it doesn't look like something i really wanna mess with to be honest. I have a spare AFM that i might try swapping out, but that one came out of a high mileage iX, in comparison to mine which only has 128K. I still have yet to unplug the DME that nando suggested, but might try swapping as well if that doesn't work.

fyi, my last fillup (with the A/C on full crank all week...blower motor is only working on highest setting and it was hot as balls in NY this week).....i only got 8.3 mpg! :curse:

Something is seriously wrong here.

[Lenwood]

mpg report

replaced my o2 sensor today, mpg instantly went up to 17-18mpg mixed driving. hmmmmm........ 3-4mpg gain

[Kershaw]

i saw plugged cats all the time in the rx8 world, but rx8 EGT can run 1800 degrees, with 2000 degrees being in the realm of possibility. e30s dont run anywhere near that hot. so i doubt a clogged cat as well.

95% highway with my ix (i moved) now, i get 24-26mpg. 24, windows down, 80-85mph. 26, windows up, 75mph, trying to keep it easy on the throttle. and my bottom end has ~370k miles, i havent checked compression, but i doubt it's that great. worked head though. 17.5lb injectors.

o2 sensor. afm cleaned? can you swap dmes with someone?

[nickskater09]

btw if anyone is looking to order a new O2 sensor, cheapest i found was from AutohausAZ, for the Bosch one....plug and play, no splicing. $74 shipped

For what it's worth, there's a DIY somewhere to make a Ford F150 o2 sensor fit and they're around $45 at autozone. Just have to change the wiring for your o2 connector.

[unevolved]

I clogged a cat on a Festiva once... But we had bought the car for $20 and subsequently cut the roof off and used it as a bowling ball into pins of empty 55gal drums.

[audiquattrot]

unplug your DME for 5 minutes to reset the adaptations.

I doubt you have a clogged cat. I've only ever seen one of those in my life.. and it was a POS VW.

i will do this when i get home tonigh. thanks chris!

[nando]

unplug your DME for 5 minutes to reset the adaptations.

I doubt you have a clogged cat. I've only ever seen one of those in my life.. and it was a POS VW.

[audiquattrot]

btw if anyone is looking to order a new O2 sensor, cheapest i found was from AutohausAZ, for the Bosch one....plug and play, no splicing. $74 shipped

[audiquattrot]

put the O2 sensor in last night. Had to pipe wrench the thing off..... I'll report back to see if it'll make a diff, but just this mornings' commute didn't seem to help (35miles, and the gas needle moved significantly). I'll update once I go thru a full tank. Also added one bottle of Techron last week to my tank. I have been using my A/C though...

If this doesn't do it, I might look into new injectors and rebuilt AFM......or maybe clogged cat?

[nando]

just got 17 on my last tank. 225/50R15 R888s. sees a minimum of 7200rpm every day. :p

[Lenwood]

mpg

i have an 89 ix, did a full tune. plugs wires cap rotor and fuel filter. im avg 14-15. my car passed smog here in cali, runs like a raped ape and i use chevron 91. have kumho a/s 225/50/15 properly inflated. for sure gonna check my 02 sensor next.

[unevolved]

The cat might be partially plugged.

Heh. Plugged cat.

[monticello]

The cat might be partially plugged.